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20 January 2025, Volume 31 Issue 1 Previous Issue    Next Issue
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Special Thesis & Basic Research
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Special Thesis & Basic Research

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Research Progress on the Early Vigor of Cereal Crop DAI Shuaijun, ZHANG Yunbo, HUANG Liying 2025, 31(1): 1-10.  DOI: 10.3969/j.issn.1006-8082.2025.01.001 Abstract ( )   HTML ( )   PDF (883KB) ( )   Crop early vigor is the characteristic of seed quality with the rapid, uniform germination and the establishment of strong seedings under various environmental conditions. Early vigor is critical to improve crop seedlings’ access to light, nutrients and water resources, weed competitiveness, leaf area development, crop growth and development rate, dry matter accumulation and yield. This article summarized the concept and evaluation index of early vigor, genetic mechanisms of early vigor, role of early vigor, and measures to improve early vigor, which can provide a theoretic basis for the breeding and cultivation of early vigor crop varieties.

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Research Progress on Nitrogen Fertilizer Management Techniques for High Yield and Emission Reduction in Rice Production and Their Impacts on Greenhouse Gas Emissions from Paddy Fields WEN Ya, GU Jiayi, WANG Chaorui, ZHANG Ying, XIAO Zhilin, ZHANG Hao 2025, 31(1): 11-17.  DOI: 10.3969/j.issn.1006-8082.2025.01.002 Abstract ( )   HTML ( )   PDF (849KB) ( )   Nitrogen is a key factor affecting rice yield, scientific nitrogen fertilizer management is not only crucial for achieving high rice productivity but also has far-reaching implications for ecological environment protection. Rice fields are significant sources of greenhouse gases such as methane and nitrous oxide, the use of nitrogen fertilizers has a notable impact on greenhouse gas emissions from rice paddies. This paper explains the emission mechanisms of greenhouse gases in rice paddies, systematically reviews the effects of nitrogen fertilizer application on greenhouse gas emissions, and discusses nitrogen fertilizer management techniques that balance high yields with emission reduction. Additionally, this article summarizes the current issues associated with nitrogen fertilizer application and proposes outlooks for future research directions.

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Effects of Different Cultivation Techniques and Varieties on Grain Yield, Fertilizer Utilization and Indirect Carbon Footprint of Indica Rice in South China HUANG Nanxun, ZHANG Minqiang, YE Qingsheng, ZHANG Congkun, LI Jianxiong, WANG Xinyu, FU Youqiang, LIANG Kaiming 2025, 31(1): 18-26.  DOI: 10.3969/j.issn.1006-8082.2025.01.003 Abstract ( )   HTML ( )   PDF (1144KB) ( )   Collaboration towards achieving high yields and carbon reduction in rice production is crucial for ensuring national food self-sufficiency and attaining the goals of carbon peak and carbon neutrality. To quantitatively analyze the carbon footprint (CF) and composition characteristics of rice production in South China, multiple site field experiments were conducted in four representative rice-producing areas in Guangdong Province. The life cycle assessment method was employed to examine variations in rice yield, fertilizer utilization rate, indirect CF (CFindirect), and its composition under different planting techniques. The results revealed that CFindirect per unit area of indica rice production ranged from 1 235.3-1 487.7 kg CO2-eq/hm2, while CFindirect per unit yield varied between 0.12-0.31 kg CO2-eq/kg yield. The cultivation technique significantly influenced yield, fertilizer utilization efficiency, irrigation frequency, and CFindirect per unit yield in rice production. Compared with the farmers conventional cultivation techniques (FP), the low-carbon and high-yielding cultivation technique (LC) significantly reduced the N fertilizer input and increased the grain yields. No significant interaction was found between the factors of cultivation techniques and rice varieties. The CFindirect per unit yield was found to be significantly and negatively correlated with the yield under the same cultivation techniques, suggesting that adopting high-yielding varieties effectively mitigated CFindirect per unit yield under the same cultivation technique. Multi-site demonstration experiments showed that LC technique increased rice grain yield by 3.67%-21.62% and improved the partial productivity of N fertilizer by 21.68%-60.81%, compared with FP. The implementation of LC technique led to an average reduction of irrigation frequency by 4 times during each cropping season. The CFindirect per unit area and CFindirect per unit yield in LC was decreased by 6.11% and 16.19%, respectively, compared with FP. N fertilizer and diesel were the primary factors influencing CFindirect in rice production. Carbon emissions from diesel accounted for 49.65%-52.88% of the total CFindirect, while emissions from N fertilizer contributed to 30.62%-34.70%. On average, reducing N fertilizer by 1 kg led to a reduction of CFindirect by 2.49 kg CO2-eq/hm2. The indirect carbon footprint per unit yield was significantly and negatively correlated with fertilizer N partial productivity, indicating that the CFindirect per unit yield could be effectively reduced by increasing yield and fertilizer N efficiency. In conclusion, the adoption of high-yield rice varieties in conjunction with optimized cultivation techniques effectively enhanced grain yield and fertilizer N efficiency, while simultaneously reduced both the CFindirect per unit area and CFindirect per unit yield. This ultimately achieved a synergistic balance between high yielding and low carbon emissions in rice production at South China.

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Effects of Salicylic Acid on Growth and Physiological Characteristics in Different Drought Tolerance Rice Varieties under Drought Stress LIU Qing, SUN Luhong, GAO Shiwei, LIU Yuqiang, CHANG Huilin, MA Cheng, WANG Jingze, WANG Cuiling, NIE Shoujun 2025, 31(1): 27-34.  DOI: 10.3969/j.issn.1006-8082.2025.01.004 Abstract ( )   HTML ( )   PDF (885KB) ( )   About one-third of the world’s arable land is susceptible to drought, leading to a decrease in the yield of grain crops. This study selected conventional japonica rice varieties Suijing 309 (drought-tolerant type) and Suijing 318 (drought-sensitive type) as experimental varieties. Based on four levels of drought stress conditions, two treatments were set up with no salicylic acid spraying and foliar spraying of salicylic acid (concentration of 100 mg/L). The growth morphology, physiological and biochemical characteristics, oxidative characteristics, nutrients, and yield of the two varieties under different treatments were measured and analyzed. The results indicated that drought stress decreased the water and gas exchange parameters in rice leaves. Drought stress exacerbated oxidative damage to rice characterized by an increase in malondialdehyde and hydrogen peroxide, an increase in reactive oxygen species production, and a rise in sodiumion content in rice tissues. Foliar spraying with salicylic acid enhanced the activity of antioxidant enzymes such as catalase, ascorbic acid peroxidase, peroxidase and superoxide dismutase, and reduced the degree of oxidative damage in rice. Drought stress reduced the ascorbic acid content, total soluble protein content, total soluble sugar content, total soluble phenol content, proline content, anthocyanin content, salicylic acid content and α-amylase activity, whereas these substance all increased after foliar spraying with salicylic acid. Foliar spraying of salicylic acid not only improved the rice biomass and metabolic activities but also eliminated the toxic effects brought by drought stress, enhanced the antioxidant capacity and improved rice nutritional status, and thereby increased rice yield. Drought-tolerant varieties have a better ability to drought stress than drought-sensitive varieties.

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Analysis of Variation Types of BADH2 Aroma Genes and Detection of Rice Blast Resistance Genes in 80 Aromatic Rice Materials LI Hu, WU Zishuai, LIU Guanglin, CHEN Chuanhua, LUO Qunchang, ZHU Qinan 2025, 31(1): 35-43.  DOI: 10.3969/j.issn.1006-8082.2025.01.005 Abstract ( )   HTML ( )   PDF (957KB) ( )   Using six aroma gene variation types and five rice blast broad-spectrum resistance gene functional markers, we detected the Badh2 aroma gene variant types and rice blast resistance genes in 80 aromatic rice materials. At the same time, we also counted the rice blast identification results of the approved varieties in rice regional trial, and identified the aroma and rice blast phenotype. The results showed that all 80 aromatic rice materials possessed aroma, with 7 samples (accounting for 8.75%) having a 803 bp deletion mutation in exons 4 to 5, and 4 samples (accounting for 5.00%) containing two types of variants with a 3 bp deletion in the 5’UTR region and an 8 bp deletion and 3 bp mutation in exon 7. The remaining 69 samples (accounting for 86.25%) had the variant type of 8 bp deletion and 3 bp mutation in exon 7. Among the 80 aromatic rice materials, the numbers containing the Pita, Pi2, Pi9, Pigm, and Pi1 resistance genes were 57 (71.25%), 12 (15.00%), 4 (5.00%), 1 (1.25%), and 1 (1.25%), respectively. There are 9 materials containing both Pi2 and Pita (accounting for 11.25%), 1 material containing both Pigm and Pita (accounting for 1.25%), and 1 material containing both Pi1 and Pita (accounting for 1.25%). The proportion of materials carrying two resistance genes simultaneously exhibiting disease resistance is higher than that of materials carrying only one resistance gene and those without resistance genes. The research results provide a basis for the application of aromatic rice materials and the pyramiding of rice blast resistance genes, as well as for molecular marker-assisted breeding of aromatic rice.

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Study on the Characteristics of Grain Production and the Countermeasures of Productivity Improvement in Zhejiang Province MAO Xiaohong, LI Yiyun, FU Linlin 2025, 31(1): 44-53.  DOI: 10.3969/j.issn.1006-8082.2025.01.006 Abstract ( )   HTML ( )   PDF (1139KB) ( )   The state has clearly pointed out that in the work of ensuring food security, the main production areas, main sales areas, and production-sales balance areas should share responsibilities together, which means “holding the bowl together and sharing the responsibility together.” As a typical grain-consuming province, Zhejiang’s in-depth analysis of the characteristics of grain production and exploration of the bottlenecks in capacity enhancement, followed by the proposal of practical strategies for increasing grain production capacity, is of great significance for ensuring national food security. The research reveals that Zhejiang faces challenges and bottlenecks in improving grain production capacity from various aspects, including the main bodies of grain production, cultivated land resources, and technology. The population carrying capacity of cultivated land resources in the province has been under continuous pressure, and since 2012, it has entered the overloaded population zone. Compared with the national scope, Zhejiang’s grain production only has a comparative advantage in production efficiency. Within the province, Pinghu, Xuzhou, and Nanxun have demonstrated certain comprehensive advantages in grain production capacity. In terms of grain crop, Zhejiang’s rice and soybean production have certain comprehensive comparative advantages, but the advantage of soybeans is not stable. To effectively respond to these challenges and increase grain production capacity, precise policies should be implemented from various aspects, such as strengthening the team of grain producers, adapting to local conditions, and ensuring that the new round of the billion-ton grain production capacity enhancement action is implemented on the ground and achieves practical results.

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Situation and High-quality Development Strategies of Jiangxi’s Grain Industry YU Yanfeng, YUAN Tingting, YU Yongqi, SUN Mingzhu 2025, 31(1): 54-60.  DOI: 10.3969/j.issn.1006-8082.2025.01.007 Abstract ( )   HTML ( )   PDF (1075KB) ( )   At present, the development situation of Jiangxi’s grain industry is good, the planting area, total output and yield per unit area are basically stable, the innovation ability of rice seed industry is strong, the planting mode of “three cropping system” is gradually popularized and applied, the level of agricultural socialization service is improved, and the policy of stable yield and supply is good. However, at the same time, it must be seen that the development of Jiangxi’s grain industry is facing the problems of tight resource constraints, increasement of grain supply pressure, low grain production efficiency affecting the endogenous power of grain production, technological innovation lagging and restricting the improvement of grain production efficiency, weak grain industry chain leading to low comprehensive benefits, insufficient supporting support and slow expansion of industrial scale. Promoting the high-quality development of Jiangxi’s grain industry is an effective way to ensure national food security and realize the strategy of strengthening Jiangxi’s agriculture. In order to promote the high-quality development of Jiangxi’s grain industry, we proposed development paths such as consolidating agricultural infrastructure, stimulating market factor vitality, enhancing scientific and technological support capabilities, deepening supply-side structural reform, and continuously strengthening supporting facilities.

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Progress on Application of WRKY Transcription Factor in Rice Stress Tolerance Genetic Engineering DUAN Junzhi, YAN Zhaoling, QI Hongzhi, ZHANG Huifang, CHEN Haiyan, YANG Cuiping, WANG Nan, ZHUO Wenfei 2025, 31(1): 61-67.  DOI: 10.3969/j.issn.1006-8082.2025.01.008 Abstract ( )   HTML ( )   PDF (685KB) ( )   Rice often encounters various abiotic stresses (including drought, high salt, low temperature, high temperature, etc.) and biotic stresses (such as pests and diseases) during its growth process, which seriously affect its normal growth and development. The WRKY transcription factor farmily, one of the largest families of transcription factors in plants, plays a key role in regulating plant growth and development as well as in responding to abiotic and biotic stresses. This paper reviews the structural characteristics of WRKY transcription factors and their application progress in genetic engineering for rice resistance to abiotic stresses (drought, high salt, low temperature, high temperature, etc.) and biotic stresses (rice blast, bacterial leaf blight, sheath blight, rice planthopper, etc.), aiming to provide a theoretical basis and practical guidance for the application of WRKY transcription factor in the genetic improvement of stress tolerance in rice and other crops.

Varieties & Technology

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Evolution Rule of Major Agronomic Traits of Heilongjiang Japonica Rice at Different Breeding Stages LIU Youhong, TANG Ao, DONG Wenjun, MENG Ying, ZHANG Xijuan, LIU Kai, LENG Chunxu, SHANG Quanyu, LAI Yongcai 2025, 31(1): 68-73.  DOI: 10.3969/j.issn.1006-8082.2025.01.009 Abstract ( )   HTML ( )   PDF (605KB) ( )   Two hundred cold japonica rice bred from 1949 to 2020 were selected to analyze the evolution rule of the main agronomic traits of cold japonica rice at different breeding stages. The results showed that the plant height of cold region japonica rice gradually increased, and the spike length gradually became longer with the advancement of breeding stage. The correlation coefficient between panicles and yield was highest in dry-raising and sparse-planting breeding stage, and the correlation coefficient between effective grain number and yield was highest after 2000. Pathway analysis showed that before 2010, the number of spikes had the greatest direct contribution to yield, while the number of grains had the greatest direct contribution to yield in the high-quality, high-yield, and multi resistance breeding stage. With the advancement of breeding stage, rice taste value and amylose content of cold region japonica rice showed an increasing trend, while the protein content showed a decreasing trend. The Chalkiness rate and Chalkiness degree of cold region japonica rice decreased, and while the aspect ratio and grain length increased after 2000. Taste value was highly significant negatively correlated with protein content and highly significant positively correlated with amylose content and grain length at all stages of breeding. Pathway analysis showed that protein content had the largest direct effect coefficient and negative effect, while starch content had a positive effect at all stages of breeding. Chalkiness also had a direct negative effect on taste value after 2000.

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Screening and Evaluation of Nitrogen-Efficient Varieties of Rice in the Yellow Rive Irrigation Area WANG Ying, MA Jiansen, WANG Fang, LIU Ruliang, HONG Yu, MAO Xinping 2025, 31(1): 74-78.  DOI: 10.3969/j.issn.1006-8082.2025.01.010 Abstract ( )   HTML ( )   PDF (656KB) ( )   Selection and breeding of high-yielding and efficient nitrogen-fertilized rice varieties is an effective strategy to solve the problems of resource shortage and environmental pollution. Thirty-nine varieties/lines were studied and screened at three nitrogen levels (0, 180 and 240 kg N/hm2) by field trials combined with principal component analysis in the Yellow Rive irrigation area of Ningxia. The yield and nitrogen utilization efficiency of each variety (line) were measured at maturity. The composite value of nitrogen efficiency of each variety (line) was obtained by principal component analysis, and the yield-nitrogen efficiency composite index was used to classify the yield-nitrogen efficiency types of the varieties (lines) for testing. The results showed that, based on the relation of the rice nitrogen efficiency composite score and yield, and the test varieties (lines) can be classified into four types, namely double high-efficiency type, high-nitrogen low-efficiency type, double low-efficiency type, and low-nitrogen high-efficiency type. A total of 11 varieties (lines), including Ninggeng 41, Jigeng 105, Ninggeng 45, Ninggeng 47, Ninggeng 48, Ninggeng 52, Ninggeng 55, Ninggeng 56, Ninggeng 57, Zhongke 804, and Hua 147, were screened as nitrogen-efficient varieties (lines). Compared with the nitrogen inefficient types, the increase in yield of the nitrogen efficient varieties (lines) was mainly due to the increase in spike length, effective spike number and total grains per spike.

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Principal Component Analysis and Comprehensive Evaluation of Salt Tolerance Related Traits in Japonica Rice in Xinjiang KANG Mintai, DU Xiaojing, ZHANG Yanhong, WEN Xiaorong, TANG Fusen, ZHAO Zhiqiang, YUAN Jie, WANG Fengbin 2025, 31(1): 79-83.  DOI: 10.3969/j.issn.1006-8082.2025.01.011 Abstract ( )   HTML ( )   PDF (502KB) ( )   To establish a comprehensive evaluation index system for salt tolerance of japonica rice in northwest China and screen salt tolerant rice varieties suitable for planting in the saline-alkali areas of Xinjiang, 10 phenotypic indicators of 18 japonica rice materials in Xinjiang were determined using 0.5% salt stress treatment. In the evaluation process, we used the salt tolerance coefficient of each individual indicator as the main evaluation index, and comprehensively applied various statistical methods such as correlation analysis, principal component analysis, and cluster analysis to fully assess the salt tolerance of these materials. The results showed that under the salt stress conditions, there was a significant correlation among the weight per panicle, leaf area, the number of full grains and the number of total grains. The 10 indexes under salt stress were transformed into 4 independent principal components by principal component analysis, and the cumulative contribution of 4 principal components reached 76.19%. According to the comprehensive evaluation value D of the tested materials, the 18 materials were classified into three types: non salt resistant materials, accounting for 11.11%; medium salt resistant materials, accounting for 61.11%; salt resistant materials, accounting for 27.78%, including SD-12, SD-17, SD-16, SD-13 and SD-15.

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Comparison of Yield and Grain Quality among Different Fragrant Rice Varieties for Ratooning Rice Planting QIN Yitian, WANG Zaiman, PAN Shenggang, ZHANG Minghua, MO Zhaowen 2025, 31(1): 84-88.  DOI: 10.3969/j.issn.1006-8082.2025.01.012 Abstract ( )   HTML ( )   PDF (611KB) ( )   In order to screen the suitable varieties for ratooning rice planting in South China, a comparative analisis was conducted under field experimental conditions on key indicators such as growth period, dry matter quality, yield, and processing quality of fragrant rice varieties including Meixiangzhan 2 (CK), Ruanhuayoujinsi, Taixiang 812, Fuxiangyou 6503, and Zengxiangyouningxiangsimiao. The results showed that Fuxiangyou 6503 performed the best in terms of annual yield, ratooning season yield, daily yield, and head rice yield, significantly higher than other tested varieties with the annual yield reached as high as 7 841.0 kg/hm2, making it suitable for cultivation as ratooning rice in south China.

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Study on the Effect of Sex-pheromone-trap Intelligent Monitoring of Chilo suppressalis SHEN Jianghua, XIAO Shan, ZHENG Wei, CHAI Weigang, YAO Hongyan 2025, 31(1): 89-93.  DOI: 10.3969/j.issn.1006-8082.2025.01.013 Abstract ( )   HTML ( )   PDF (605KB) ( )   In order to verify the field monitoring accuracy and feasibility of the sex-pheromone-trap intelligent monitoring system for Chilo suppressalis, the author carried out the sex-pheromone-trap intelligent monitoring effect test for Chilo suppressalis in Fenghua District, Yinzhou District and Zhenhai District of Ningbo City in 2022. The results showed that the tested monitoring system had a high recognition accuracy for Chilo suppressalis. The average recognition accuracy rate of the three places was 97.2%, and the correlation coefficient (R2 value) of intelligent recognition and manual recognition was above 0.9800. The dynamic comparison results of the occurrence of Chilo suppressalis adults obtained from the the sex-pheromone-trap intelligent monitoring and the light attraction monitoring were consistent, which can accurately reflect the occurrence dynamics of Chilo suppressalis in the field, and can be used for the population occurrence monitoring and early warning of Chilo suppressalis.

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Development and Technical Points of the Side Deep Fertilization Technology for Rice Mechanical Transplanting WU Huayu, WU Hongmiao, LI Zhong, WU Wenge 2025, 31(1): 94-99.  DOI: 10.3969/j.issn.1006-8082.2025.01.014 Abstract ( )   HTML ( )   PDF (830KB) ( )   Rice is one of the important food crops in China, and its yield directly affects national food security. Coordinating the safe production of rice, ecological environmental protection, and efficient utilization of resources has become a key and difficult issue faced in the field of sustainable agricultural development in China and even globally. The side deep fertilization technology for rice mechanical transplanting integrates the side deep application of fertilizer with the mechanical transplanting of rice seedlings, effectively replacing the traditional broadcast fertilization method. It has significant advantages such as improving fertilizer utilization efficiency, promoting the growth and development of rice, and increasing yield. Based on the team’s years of in-depth research and rich practical experience, this paper reviewed the research status and future development trends of side deep fertilization technology for rice mechanical transplanting, focusing on the development history, core technical points, existing constraints, and corresponding reference suggestions. In the process of promoting the side deep fertilization technology for mechanical transplanting, attention should be paid to the organic combination of policy support and technological innovation, to achieve the coordinated development of rice safety production, ecological environmental protection, and efficient resource utilization, providing a reference for the transformation of China’s agriculture towards an environmentally friendly and green sustainable production model.

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Effects of Sowing Date on Fertility Transformation and Self-pollination Rate of Rice Dual-purpose Genic Male Sterile Lines KANG Hongcan, LI Guosheng, WANG Jinyan, ZHANG Yi, DUAN Haoping, YIN Zhengqin, HE Rongman, CHUAN Xingkuan 2025, 31(1): 100-105.  DOI: 10.3969/j.issn.1006-8082.2025.01.015 Abstract ( )   HTML ( )   PDF (510KB) ( )   Seven representative dual-purpose genic male sterile lines of rice were selected as experimental materials, and a sowing date experiment was conducted at the breeding base of rice dual-purpose genic male sterile lines in Shidian County to study the fertility transformation characteristics of different types of dual-purpose genic male sterile lines and the optimal sowing date for high-yielding reproduction of male sterile lines. The results showed that the sowing date had a significant impact on the fertility conversion and self-pollination rate of sterile lines. The peak values of fertility conversion and self-pollination rate of different male sterile lines varied greatly with the change of sowing date, and the tested sterile lines all had the optimal sowing date. The fertility conversion of photosensitive japonica sterile lines was mainly influenced by light length. Under the condition of ensuring safe full heading, delaying sowing was beneficial to fertility transformation and improving self-pollination rate, thus increasing reproductive yield. Due to the short growth period and rapid growth and development, the temperature sensitive early indica male sterile lines could achieve basic yield by early sowing to utilize the short-term low temperature in early June under the premise of ensuring the seedling age. The growth and development and fertility transformation of different temperature sensitive mid indica male sterile lines varied significantly. Identifying the optimal sowing date was the key to their high yield and high efficiency reproduction. By analyzing the temperature changes of the rice dual-purpose nuclear male sterile line breeding base in Shidian County over the years, it was found that the probability of high temperatures occurring from late June to mid July was high. The sensitive period of male sterile line reproduction should avoid this period as much as possible.

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Exploration of Lateral Depth Variable Fertilization Technology for Rice in Cold Regions ZHANG Shaobo, ZHANG Jincheng 2025, 31(1): 106-108.  DOI: 10.3969/j.issn.1006-8082.2025.01.016 Abstract ( )   HTML ( )   PDF (281KB) ( )   Using Longgeng 31 as the test variety, an experiment on the application effects of different fertilization techniques (conventional fertilization, lateral depth quantitative fertilization, lateral depth variable fertilization) on rice was carried out at Qixing Branch of Beidahuang Agriculture Co., Ltd. The results showed that the growth process of rice was basically the same in all fertilization treatments. The tillering ability of rice treated with lateral deep variable fertilization was the strongest, with a tiller number of 13.6 per cluster, which was 0.4 and 0.3 higher than that of the conventional fertilization treatment and the lateral depth quantitative fertilization treatment, respectively. The rice yield of the lateral depth variable fertilization treatment was highest, reaching 9 085.5 kg/hm2, which increased by 247.5 kg/hm2 and 54.0 kg/hm2 respectively compared to the conventional fertilization treatment and the lateral depth quantitative fertilization treatment. The lateral depth variable fertilization mainly increased yield by increasing the number of effective panicles. The benefit of lateral depth variable fertilization treatment is the highest, which is 298.5 and 192.3 yuan/hm2 higher than conventional fertilization treatment and lateral depth quantitative fertilization treatment, respectively.

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Breeding of Rice Variety Degeng 5 With Low Cadmium Accumulation and Reflection on Japonica Rice Breeding in Low Latitude Plain and Hilly Area of Southwest China LI Zhaoxiang, QIN Jian, YANG Li, LUO Jing, JIANG Kaifeng, TANG Bin 2025, 31(1): 109-111.  DOI: 10.3969/j.issn.1006-8082.2025.01.017 Abstract ( )   HTML ( )   PDF (520KB) ( )   This article introduced the breeding process, characteristics and key cultivation techniques of Degeng 5, and discussed the breeding route of japonica rice in the low latitude plain and hilly areas of Southwest China. Degeng 5 is a new mid maturity conventional japonica rice variety selected by Rice and Sorghum Reserarch Institute, Sichuan Academy of Agricultural Sciences through the pedigree method, suitable for planting in the low-latitude plain hilly area of Southwest China and has the characteristics of high temperature resistance, high quality, and low rice accumulation of cadmium. This variety was approved by the Sichuan Provincial Crop Variety Approval Committee in 2023.

Cultural Column

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Research on the Spatio-temporal Characteristics, Multiple Values and Protection Development of Rice Agricultural Heritage in Zhejiang Province WANG Caiyan, ZHENG Liangyan, YU Lan, XU Minying, GU Xingguo 2025, 31(1): 112-119.  DOI: 10.3969/j.issn.1006-8082.2025.01.018 Abstract ( )   HTML ( )   PDF (1093KB) ( )   Rice cultivation in Zhejiang Province has a profound historical and cultural foundation, which can be traced back to the Shangshan culture period 10 000 years ago. It has been gradually formed through prehistoric period such as the Kuahuqiao Culture, Hemudu Culture, Majiabang Culture and Liangzhu Culture. Through continuous improvement in various historical periods, a rich and diverse cultural heritage of rice agriculture is still preserved today. According to statistics, the resources of rice agricultural heritage systems in Zhejiang Province are not only in the forefront of the country in quantity, but also rich in types, which have the value of history and culture, economy and society, ecology and environment, promotion and demonstration. On the basis of summarizing the formation and evolution of rice culture in Zhejiang Province and the distribution characteristics of prehistoric rice culture sites, this paper discussed the relationship between rice agricultural heritage systems and prehistoric rice culture in Zhejiang Province, and then classified and analyzed the diverse value of rice agricultural cultural heritage in Zhejiang Province. Finally, the policy recommendations for the protection and development of rice agricultural heritage systems in Zhejiang Province were put forward.