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20 March 2016, Volume 22 Issue 2 Previous Issue    Next Issue

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Research Progress and Prospect on Utilization of Heterosis between Indica-Japonica Rice Subspecies XU Wei-Dong, CAI Jin-Yang, YANG Yao-Cheng 2016, 22(2): 1-7.  DOI: 10.3969/j.issn.1006-8082.2016.02.001 Abstract ( )   PDF (931KB) ( )   This study reviewed the current research status of indica-japonica rice breeding practices, and analyzed the difficulties and solutions in the utilization of heterosis in subspecies. Meanwhile the authors summarized the principal issues to make use of indica-japonica subspecies heterosis completely. As well as combined the agricultural production and breeding practice, the utilization of heterosis between indica and japonica rice is prospected.

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Study on Quality Traits and Inheritance of Hybrid Rice and Its Parents 2016, 22(2): 8-14.  DOI: 10.3969/j.issn.1006-8082.2016.02.002 Abstract ( )   PDF (600KB) ( )   Genetic analysis of the mid-parent heterosis and heterobeltiosis in rice quality was carried out by using the hybrid rice and their parents as the research objects. The results showed that the mid-parent heterosis and heterobeltiosis of brown rice and milled rice rate of hybrid rice were positive, the mid-parent heterosis and heterobeltiosis of head rice rate of hybrid rice were negative. The average 1 000-grains weight of hybrid rice was 26.48 g and ranged between the male sterile line and the restore line. The mid-parent heterosis of 1 000-grains weight of hybrid rice was positive and the heterobeltiosis of hybrid rice was negative. The average seed length, seed width and length-width ratio of hybrid rice was 6.59 mm, 2.24 mm and 2.98 mm respectively. The mid-parent heterosis and heterobeltiosis of seed length, seed width and length-width ratio of hybrid rice were positive. The average chalky grain rate and chalkiness degree of hybrid rice was 7.5% and 17.86%. The mid-parent heterosis and heterobeltiosis of chalky grain rate and chalkiness degree of hybrid rice were negative. The average amylose content of hybrid rice was 16.98% and ranged between the male sterile line and restore line. The mid-parent heterosis of amylose content of hybrid rice was positive and the heterobeltiosis of amylose content of hybrid rice was negative. The average gel consistency of hybrid rice was 36.28 mm, the mid-parent heterosis and heterobeltiosis of gel consistency of hybrid rice were negative. Therefore, the ideal hybrid rice combinations with high grain quality can be selected according to the genetic association between the parents and hybrid rice .

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Correlation Analysis of Grain Quality in Medium Indica Hybrid Rice Combinations with Different Grain Shape 2016, 22(2): 15-20.  DOI: 10.3969/j.issn.1006-8082.2016.02.003 Abstract ( )   PDF (517KB) ( )   According to the classification method of rice grain shape analysis on the situation of quality characters and correlation was conducted by using the 36 medium indica hybrid rice combinations authorized in Sichuan Province during 2013-2014. The results indicated that only 2 combinations reach three grade quality standards in the 36 indica hybrid rice combinations, the length-width ratio of the 2 combinations were greater than 2.9. According to the grain quality of individual traits, the highest quality rate is brown rice rate, followed by gel consistency and head milled rice rate, the last were chalky rice rate and chalkiness degree. The high quality rate of chalky rice rate and chalkiness degree of length grain type combinations were both 16.67%. The high quality rate of chalky rice rate and chalkiness degree of medium grain type combinations were 0 and 14.29%. The high quality rate of chalky rice rate and chalkiness degree of short grain type combinations were 10.00% and 0 respectively. Improving the quality of medium indica hybrid rice combinations was restricted by chalky rice rate and chalkiness degree. Correlation analysis of quality results showed that the chalky rice rate and chalkiness degree were highly significant negative correlation with length-width ratio and highly significant positive correlation with amylose content. The chalky rice rate and chalkiness degree were highly significant positive correlation with amylose content in length grain type combinations. The chalky rice rate and chalkiness degree were highly significant negative correlation with length-width ratio and highly significant positive correlation with amylose content in medium grain type combinations. The chalky rice rate and chalkiness degree were not significantly correlated with other quality traits of short grain type combination. It is suggested that genetic improvement of the chalky rice rate and chalkiness degree in medium indica hybrid rice combinations could start from grain shape. It is a good suggestion to select long grain type, big capacity, no crack and almost cylindrical materials or combinations.

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Effects of Secondary Element and Microelement Fertilizer Application on Lodging Resistance and Yield of Super Rice 2016, 22(2): 21-26.  DOI: 10.3969/j.issn.1006-8082.2016.02.004 Abstract ( )   PDF (691KB) ( )   A field experiment was carried out to investigate the effects of secondary element and microelement fertilizer （main component contains CaO, MgO, ZnO and SiO2, with content of 20%, 12%, 10% and 3%, respectively） on the lodging resistance and yield of Tianyou 3618, at Guangzhou with four levels of fertilizer application （F0, F1, F2 and F3 referred to 0, 25, 50 and 75 kg/667 m2 in whole growth period, respectively） in 2014. The results showed that secondary element and microelement fertilizer decreased the lodging index and the height of gravity center. The lodging index of F1 and F2 treatments were significantly decreased by 10.50% and 8.37% respectively, and the gravity center height were decreased by 2.56% and 2.22% respectively. The breaking resistance of the plant, stem, and basal internodes were significant increased by 10.78%, 13.49% and 12.33%, and the fresh weight percentage and culm wall thickness of the internode were significant increased by 11.93% and 4.81%, respectively.The secondary and microelement fertilizer had significant effects on the lodging index of basal internodes. Compared with the third internodes, the lodging index of second internode decreased by 5.51 percentage points, and the internode fresh weight percentage, fresh weight/dry weight, internode culm wall thickness and internode diameter increased by 3.55, 2.41, 0.98 and 0.19 percentage points. The secondary and microelement fertilizer significant increased the spike rate and green leaves area of the heading period. These results showed that the secondary and microelement fertilizer was beneficial to the formation of rice yield, improved rice lodging resistance. The suitable amount of the secondary and microelement fertilizer application was 25~50 kg/667 m2.

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Effects of Bud Fertilizer and Stubble Types on Grain Yield and Regeneration Capacity of Ratoon Rice in Northeast of Jiangxi Province 2016, 22(2): 27-30.  DOI: 10.3969/j.issn.1006-8082.2016.02.005 Abstract ( )   PDF (511KB) ( )   The northeast of Jiangxi Province is suitable for planting ratoon rice because of sufficient light and heat resources. Filed experiments were carried out to explore the reasonable application period of bud fertilizer, harvesting methods and better height of stubble. The results showed that bud fertilizer could improve grain yield of ratoon rice. Compared with no bud fertilizer treatment, the yields of ratoon rice in 170 kg/hm2 N and 125 kg/hm2 N were increased by 48.9% and 36.9%, and the effective panicles and grains per panicle were also increased. The yield of manual harvesting ratoon rice was higher than mechanical harvesting, and its buds on stubble, the effective panicles and grains per panicle were increased by 7.7%, 27.9% and 11.6%. In manual harvesting, compared with low stubble, higher stubble could improve grain yield, buds on stubble, effective panicles and grains per panicle of ratoon rice. Therefore, the study shows that, 170 kg/hm2 N and the manual harvesting is the better management mode of ratoon rice in the Northeast of Jiangxi Province.

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Effect of Temperature on Cadmium Content of Brown Rice in Different Cultivars 2016, 22(2): 31-35.  DOI: 10.3969/j.issn.1006-8082.2016.02.006 Abstract ( )   PDF (668KB) ( )   Field experiments were carried out to study the influence of temperature on brown rice cadmium accumulation with different early rice and late rice varieties as materials. The results indicated that the difference range of early-season variant varieties（S6） was 5.29 times under different temperature and growth stage of the four different Cd resistant varieties, and was 67.4%, 12.8%, 181.4% higher than stable varieties（S1, S5, S4） respectively, the range of late-season variant varieties（K11）was 50.2%, 78.8%, 160.6% higher than stable varieties（K2, K33, K7）respectively. Comprehensive performance of cadmium content of brown rice in different rice cultivars, the tillering stage and filling stage are sensitive periods for temperature influence on uptake of cadmium; low temperature in early growth period and high temperature in later growth period contributes to accumulation of cadmium in grain.

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Study on Methane Emissions in Paddy Soil under Covered Film Drip Irrigation 2016, 22(2): 36-38.  DOI: 10.3969/j.issn.1006-8082.2016.02.007 Abstract ( )   PDF (421KB) ( )   To reveal CH4 emissions in rice fields under covered film drip irrigation, the comparative method was used to study the methane emission of rice paddy with drip irrigation under mulch film. Experiments were divided into three treatments: drip I, drip II and flooding. The local high-yielding cultivars Jihan 1 was used to analysis the methane emissions from rice paddy. The results showed that methane emission flux from rice fields under covered film drip irrigation was less than flooded conditions; methane emission flux in drip Ⅰ was higher than that of drip Ⅱ, which indicated that the soil moisture content is one of the major factors which affect CH4 emission; methane emissions trend under three conditions were roughly the same, and the emission peaks were in mid tillering stage and jointing booting stage, which indicated that the process of CH4 emission from paddy field under film drip irrigation was not changed.

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Effects of Nitrogen Application on Yield and Yield Formation of Pot-Seedling Mechanical Transplanting Rice 2016, 22(2): 39-42.  DOI: 10.3969/j.issn.1006-8082.2016.02.008 Abstract ( )   PDF (491KB) ( )   The effects of nitrogen application ratio on yield and yield formation of pot-seedling mechanical transplanting rice were studied in this paper, with Huaidao 11 and Yongyou 2640 as materials. The results showed that the relation between panicle and grains, and the yield were better than other treatments, when the basal fertilizer and panicle fertilizer ratio is 7∶3 or 6∶4. The population tillers were growing and declining steadily, the spike rates were above 70%, the leaf area index and biomass increased with the treatments of 7∶3 or 6∶4 in the middle and late growth stage.

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Effects of Water Direct Seeding on Yield and Quality of Japonica Rice in Cold Area 2016, 22(2): 43-46,50.  DOI: 10.3969/j.issn.1006-8082.2016.02.009 Abstract ( )   PDF (560KB) ( )   Direct seeding rice has been expanding in Heilongjiang Province year by year. In order to understand the effects of water direct seeding cultivation techniques on yield and quality of rice in cold area, Hulin City and Fuyuan County, two larger water direct seeding rice producer of Heilongjiang Province were investigated. The results showed that the effect of water direct seeding on panicle length, primary branch number and secondary branch number of Jinhe 1 were less than Longjing 31. The yield of Jinhe 1 and Longjing 31 reached 7.78 t/hm2 and 8.73 t/hm2 under water direct seeding, respectively, significantly lower than transplanted rice. The low yield of water direct seeding was due to the signficant decreased in grain weight. The milled rice rate, head rice rate and protein content of Jinhe 1 and Longjing 31 of water direct seeding rice were lower than transplanted rice. The amylose content was higher than transplanted rice, but the difference were not significant. The chalky rice rate and chalkiness degree of Jinhe 1 under water direct seeding were significantly lower than transplanted rice. The chalky rice rate and chalkiness degree of Longjing 31 were not significant among different cultivation methods. The taste score of two varieties in two cultivation methods were also not significant.

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Characteristics of Photosynthesis and Matter Production of Japonica Rice in Northeast China under High-light-efficiency Cultivation Mode 2016, 22(2): 47-50.  DOI: 10.3969/j.issn.1006-8082.2016.02.010 Abstract ( )   PDF (408KB) ( )   Dongnong 428 and Longdao5 were used as test materials to research the characteristics of photosynthesis and matter production of japonica rice in Northeast China under different cultivation mode. The results showed that, under the appropriate ridge distance, the material production and photosynthetic characteristics of high-light-efficiency cultivation mode such as the dry matter accumulation, transportation, leaf area, photosynthetic potential were better than those of other cultivation modes, and the group dry weight and yield at the maturing stage were 1.75~2.51 t/hm2 and 2.66~3.78 kg/30 m2 higher than conventional cultivation. The group dry matter weight and yield of （20+40） cm×15 cm ridge distance treatment were significantly higher than those of （20+50） cm×15 cm ridge distance treatment under high-light-efficiency cultivation mode, increased by 2.00~2.67 t/hm2 and 2.91~4.95 kg/30 m2 respectively. It suggested that accumulation of group dry matter would decrease when the ridge distance was beyond the suitable range, and not conducive to the final formation of high yield population of rice.

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Study on the Production and Transportation of Dry Matter of Erect and Curved Panicle Type Rice 2016, 22(2): 51-53,56.  DOI: 10.3969/j.issn.1006-8082.2016.02.011 Abstract ( )   PDF (462KB) ( )   A comparative analysis on the production and transportation of dry matter in different growth stages of erect panicle type rice and curved panicle type rice was conducted. The results showed that the filling degree of erect panicle type rice was significantly higher than that of the curved panicle type rice. The accumulation of dry matter of erect panicle type rice in vegetative growth stage was higher than that of the curved panicle type rice, and the output rate of two panicle type rice was the opposite. The contribution rate of dry matter accumulation after heading in two panicle type rice were more than 85%, and the contribution of erect panicle type rice was higher than that of the curved panicle type rice. The dry matter translocation rate of dry matter before heading of erect panicle type rice was lower than that of the curved panicle type rice.

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Preliminary Study on QuEChERS-LC-MS/MS Method for Rapid Detection of 12 Kinds of Pesticide Residues in Rice 2016, 22(2): 54-56.  DOI: 10.3969/j.issn.1006-8082.2016.02.012 Abstract ( )   PDF (372KB) ( )   To detect 12 kinds of pesticide in rice by QuEChERS-LC-MS/MS with acetonitrile as extracting agent. By comparison，the anhydrous magnesium sulfate, PSA, and C18 were selected as adsorbent, and the amount of the three adsorbent was determined as 50 mg, 50 mg and 20 mg. Extraction of rice after purification were detected by LC-MS/MS with 0.1% formic acid and tendency for 2 mmol/L ammonium acetate mixed aqueous solution and acetonitrile as mobile phase. The results showed that a good linear relationship （R>0.99）, the recoveries of 12 kinds of pesticide were 70.3%~118.5%, with the precision below 20%. This method not only could meet the inspection work of rice residue but also have the characteristics of energy saving and environmental protection, simple operation and cost saving and high efficiency.

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Developing of Rice and Grain by New Concept for Ensuring Balance and Beautiful China 2016, 22(2): 57-60.  DOI: 10.3969/j.issn.1006-8082.2016.02.013 Abstract ( )   PDF (611KB) ( )   After analysising the supply and demand trend of rice and grain in recent years in China, put forward the measures of rice and grain development in the future, by new concept proposed in 18 the fifth plenary session of the central committee of the communist party of China, including grasping market and resources and development trend in China and abroad, doing grain production and consuming guide and regulation, scientifically playing rice and grain production layout, innovating development model and sci-techniques, carrying out grain saving and loss reducing research and application.

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Establishment and Application of Forecasting Model on Early Southern Rice Black- streaked Dwarf Virus Disease Incidence 2016, 22(2): 61-64.  DOI: 10.3969/j.issn.1006-8082.2016.02.014 Abstract ( )   PDF (489KB) ( )   The southern rice black streaked dwarf disease virus is an important viral disease that newly happen in recent years in rice area of Southern China. In order to clarify the relationship between the ecological factors and the disease incidence and improve the ability to predict and avoid serious losses，the author did a survey on their relationship based on the occurrence data from 2007 to 2015 by stepwise regression and path analysis. The results showed that the temperature and rain coefficient of late October last year and the late southern rice black streaked dwarf disease incidence of last year have a critical impact on the disease incidence. The author established the early southern rice black streaked dwarf virus disease incidence regression model with the ecological factors, and the model is ■ = -2.7590 + 0.1895 X 1 + 0.1345 X 2 + 1.0495 X 3 + 0.0044 X 4 . The fitting effect of historical data is better by using the regression equation. In 2015, the difference between the forecast values and actual values is small and the predictive ability is strong，so the model is suitable for local as well as West Guangdong region.

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Discussion on Rice Bacterial Leaf Blight Occurrence and Integrated Control Techniques 2016, 22(2): 65-67.  DOI: 10.3969/j.issn.1006-8082.2016.02.015 Abstract ( )   PDF (491KB) ( )   Rice bacterial leaf blight rises in epidemic trend in recent years, which is a threat to high and stable rice production. In order to explore epidemic regularity and control strategy of rice bacterial leaf blight in new cropping system, occurrence, damage, infestation cycle and affecting factors of rice bacterial leaf blight were systematically investigated, major causes of the disease rising were found out, the control strategy and technology of the disease were presented.

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Preliminary Application Effects on Machine-transplanted Rice of Different Seedling Substrates 2016, 22(2): 68-71.  DOI: 10.3969/j.issn.1006-8082.2016.02.016 Abstract ( )   PDF (497KB) ( )   Comparing the application effects on machine-transplanted rice of different seedling substrates, with nutrient soil seedling as control. The results showed that the leaf color of seedling substrates treatment significantly shallower than nutrient soil treatment, seedling quality is poorer. But the matrix seedling root is better. The survival rate and seedlings is slow than the nutrient soil seedling treatment after transplanting in field. The final yield of nutrient soil seedling, Changzhou Lihua and Xinghua xintuyuan are almost the same, and the yield of the other substrates are relatively low.

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Application Research of Fertilizer Combination from Beijing Xinbefeng Agrochemical Co. Ltd on Rice with Drip Irrigation under Mulch Film 2016, 22(2): 72-74.  DOI: 10.3969/j.issn.1006-8082.2016.02.017 Abstract ( )   PDF (418KB) ( )   Application effects were testing of different fertilizer methods between conventional fertilization of Xinjiang and fertilizer combination from Beijing Xinbefeng Agrochemical Co. Ltd on mulched drip irrigation rice. The results showed that the root growth, chlorophyll content, pure photosynthetic, yield and yield components of new fertilizer combination treatment from Beijing Xinbefeng Agrochemical Co. Ltd were higher than that of conventional fertilization of Xinjiang reclamation area. The amount of new fertilizer combination is lower than conventinonal fertilization, and friendly to soil and ecological environment.

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Effects of Sowing Date on Yield and Characteristics of Tianyou 8012 2016, 22(2): 75-77.  DOI: 10.3969/j.issn.1006-8082.2016.02.018 Abstract ( )   PDF (348KB) ( )   A field experiment was carried out to explore the appropriate sowing date of single season rice combination Tianyou 8012. The results showed that Tianyou 8012 is suitable for planting in Zhejiang Province for single late season rice． It can be normal heading and grain filling when sowing date from May 20th to June 9th. However, with the delay of sowing date, the full heading stage and maturity stage is also pushed back. Tianyou 8012 has high 1 000-grain weight and seed setting rate under appropriate seedling age. In this experiment, the yield and daily output of the treatment with May 25th sowing, 35d seedling age was significant higher than the other 4 treatments.

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Application Effects of Methyl Jasmonate （MeJA） in Different Japonica Inter-subspecific Hybrid Rice Seed Production 2016, 22(2): 78-80.  DOI: 10.3969/j.issn.1006-8082.2016.02.019 Abstract ( )   PDF (384KB) ( )   In order to make the the floret opening time of both male parent and female parent fit well, a field experiment, in which the MeJA was sprayed to the female parent of 3 japonica intersubspecific hybrid rice with different floret opening time characteristics was carried out. The results showed that the MeJA can adjust the floret opening time of female parent significantly to fit the floret opening time of it's male parent, increase seed setting rate, and enhance the seed production yield obviously.

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Breeding and Cultivation Techniques of Japonica Rice Songxiangzaojing with Fine Quality and Early Maturity 2016, 22(2): 81-82,84.  DOI: 10.3969/j.issn.1006-8082.2016.02.020 Abstract ( )   PDF (423KB) ( )   Songxiangzaojing is a new Japonica rice variety with fine quality and early maturity, bred by Shanghai Songjiang Seed Co., Ltd. It was systematic breeding from Suhuxiangjing. The breeding process and cultivation techniques of Songxiangzaojing was introduced in this paper.

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Breeding and High-yielding Cultivation Techniques of Rice Variety Huangsilizhan with Fine Quality 2016, 22(2): 83-84.  DOI: 10.3969/j.issn.1006-8082.2016.02.021 Abstract ( )   PDF (256KB) ( )   Huangsilizhan is a new rice variety with fine quality as early and late rice, developed by Rice Research Institute of Guangdong Academy of Agricultural Sciences. It is resistance to rice blast, middle susceptible to bacterial blight and good lodging resistance. It was approved by Guangdong Provincial Crop Variety Appraisal Committee in 2015. The characteristics and cultivation techniques of Huangsilizhan was introduced in this paper.

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Characteristics and Cultivation Techniques of Weakly Photosensitive Hybrid Rice Combination Anfengyou 5618 with Fine Quality 2016, 22(2): 85-86.  DOI: 10.3969/j.issn.1006-8082.2016.02.022 Abstract ( )   PDF (264KB) ( )   Anfengyou 5618 is a new weakly photosensitive hybrid rice combination, derived from Anfeng A and Guanghui 5618, developed by Rice Research Institute, Guangdong Academy of Agricultural Sciences. It has good plant type, fine grain quality, good blast resistance, high yield and wide adaptability. It is suitable for planting in south and southwest in Guangdong Province as late season rice. It was registered and released by Guangdong Provincial Crop Variety Appraisal Committee in 2013. The characteristics and cultivation techniques of the combination were introduced in this paper.

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Planting Performance and High Yield Cultivation Techniques of Middle Indica Hybrid Rice Gangyou 52 2016, 22(2): 87-88.  DOI: 10.3969/j.issn.1006-8082.2016.02.023 Abstract ( )   PDF (315KB) ( )   Gangyou 52 is a three-line indica hybrid rice, with a moderate growth period, high yield, better resistance to rice blast and wide adaptability, bred by Rice Research Institute, Anhui Academy of Agricultural Sciences. It is suitable for planting as middle season rice in Anhui and middle and lower reaches of the Yangtze River. It was approved by Anhui Provincial Crop Variety Appraisal Committee in 2013. High yield cultivation should pay attention to suitable sowing date, cultivating strong seedlings, reasonable planting density, fertilizer and water management, pest control and other key points.

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Breeding and Cultivation Techniques for Seed Production of Tianlongyou 1340 2016, 22(2): 89-92.  DOI: 10.3969/j.issn.1006-8082.2016.02.024 Abstract ( )   PDF (548KB) ( )   Tianlongyou 1340 is a new three line hybrid rice combination, bred by Sichuan Xike Seed Co. Ltd. and Henan Province Xinyang Academy of Agricultural Sciences, derived from Tianlong 13A, a CMS line as female parent, and Tianlonghui 140, a high biomass and high combining ability restorer line. The average yield of the regional test in 2012-2013 was 585.5 kg/667 m2, increased by 6.9%, and had extremely significant difference with the control. The average yield of the production test in 2014 was 608.4 kg/667 m2, increased by 7.0%, the yields of all the test points were increased. It was approved by Henan Provincial Crop Variety Approval Committee in 2015.

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High Yield Cultivation Techniques of the Mixed Cropping in Suijing 4 and Kendao 12 2016, 22(2): 93-94,96.  DOI: 10.3969/j.issn.1006-8082.2016.02.025 Abstract ( )   PDF (423KB) ( )   According to the characteristics of Kendao 12 and Suijing 4, this paper described the principle of the two rice varieties of mixed planting with the ratio of 1∶1, and put forward the high yield cultivation techniques of mixed planting.

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Breeding and Cultivation Techniques of Hybrid Rice Combination Ningxianyou 8 with High Yield and Fine Quality 2016, 22(2): 95-96.  DOI: 10.3969/j.issn.1006-8082.2016.02.026 Abstract ( )   PDF (273KB) ( )   Ningxianyou 8 is a new hybrid rice combination with high yield and fine quality. It was bred by Institute of Food Crops, Jiangsu Academy of Agricultural Sciences, and approved by Jiangsu Crop Variety Appraisal Committee in 2015. It is suitable for planting in Jiangsu for middle season indica rice．

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Characteristics and Cultivation Techniques of Glutinous Rice Variety Bannanuo 18 2016, 22(2): 97-98.  DOI: 10.3969/j.issn.1006-8082.2016.02.027 Abstract ( )   PDF (286KB) ( )   Bannanuo 18 is a middle maturing glutinous rice, bred by Xishuangbanna Dai Autonomous Prefecture Institute of Agricultural Sciences in 1996, derived from dianyin 313 as female parent and Menglanuo as male parent. It has high yield and fine quality, good palatability, high 1000-grain weight and other major characteristics. It was approved by Yunnan Provincial Crop Variety Appraisal Committee in 2014. The characteristics and high yield cultivation techniques of Bannanuo 18 were introduced in this paper.

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Evolution of Paddy Soil Fertility in Tonglu County in the Past 30 Years 2016, 22(2): 99-103.  DOI: 10.3969/j.issn.1006-8082.2016.02.028 Abstract ( )   PDF (609KB) ( )   In order to understand the status and evolution trend of fertility of paddy soils in Tonglu county, Zhejiang province, historical changes in soil pH, organic matter, available P, available K of the cultivated layer were analyzed over the past 30 years by comparing data obtained from the current soil quality investigation of cultivated lands and the second national soil survey. The results showed that those soil fertility indexes of cultivated layer of paddy soils in the county changed greatly in the past 30 years, but the direction and degree of the change varied with nutrient types and zones. The soils were slightly acidified, and averaged pH declined 0.07 pH unit. The soil cation exchange capacity of paddy soils in the county was at low level. The organic matter of the soils was significant decreased by 17.32%. The decrease proportion of soil organic matter in Fenshui town was 24.17%, and was the largest in the whole county. The available phosphorus and potassium were significant improved by 173.75% and 63.05%, respectively. The soil available P has emerged accumulation phenomenon in some area. The most obvious accumulation appeared in Tongjun town, and it was increased by 316.24%. The available K was also remarkable improved, but it was still at a moderate level, and Tongjun town was increased by 112.62%. The changes in soil fertility of paddy field in the county were relate to the changes in fertilization structure and cropping system in the past 30 years.

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Rice Production Status, Problems and Suggestions of Jining City 2016, 22(2): 104-106.  DOI: 10.3969/j.issn.1006-8082.2016.02.029 Abstract ( )   PDF (461KB) ( )   Jining rice is mainly planted in the Weishan Lake area, including Yutai, Rencheng, Weishan and Jiaxiang County. The basic situation of rice production in Jining City was introduced in this paper, and put forward some suggestions for the development of rice industry in Jining City.

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Development Situation and Strategies of Fine Quality Rice Industry in Songbai Town Yongshun County 2016, 22(2): 107-109.  DOI: 10.3969/j.issn.1006-8082.2016.02.030 Abstract ( )   PDF (487KB) ( )   The survey results showed that the development of high quality rice industry in Songbai Town, Yongshun County, has superior natural resources, good industrial base, market potential. It is suggested that we should intensify the market guidance, play a leading role, develop scale management, strengthen policy support, and promote the rapid development of rice industry.