Effects of Leaf Spraying with Cadmium Inhibitor on Rice Yield and Cadmium Absorption

doi:10.3969/j.issn.1006-8082.2024.05.010

China Rice ›› 2024, Vol. 30 ›› Issue (5): 72-75.DOI: 10.3969/j.issn.1006-8082.2024.05.010

• Special Thesis & Basic Research • Previous Articles Next Articles

Effects of Leaf Spraying with Cadmium Inhibitor on Rice Yield and Cadmium Absorption

LIAO Jiahui¹^,³^,^#, PAN Ning²^,^#, LU Chusheng¹, LAI Huai², MENG Xiangliang², CAI Haoyang¹^,³, WANG Junjiang¹^,³, WANG Xinyu¹, YIN Yuanhong¹, YE Qunhuan¹, CHENG Xiong³^,^*(), FU Youqiang¹^,^*()

¹Rice Research Institute, Guangdong Academy of Agricultural Sciences/Guangdong Key Laboratory of New Technology in Rice Breeding/Key Laboratory of Genetics and Breeding of High Quality Rice in South China (Co-construction by Ministry and Province), Ministry of Agriculture and Rural Affairs/Guangdong Rice Engineering Laboratory, Guangzhou 510640, China
²Dongguan Bense Biotechnology Co., LTD., Dongguan, Guangdong 523588, China
³South China Agricultural University, Guangzhou 510642, China

Received:2024-07-24 Online:2024-09-20 Published:2024-09-12
Contact: ^*chengx@scau.edu.cn; fyq040430@163.com
About author:First author contact:^# Co-first author

水稻叶片喷施阻镉剂对产量和镉吸收的影响

廖嘉晖¹^,³^,^#, 潘宁²^,^#, 陆楚盛¹, 赖怀², 孟祥亮², 蔡昊炀¹^,³, 王俊江¹^,³, 王昕钰¹, 尹媛红¹, 叶群欢¹, 程雄³^,^*(), 傅友强¹^,^*()

¹广东省农业科学院水稻研究所/广东省水稻育种新技术重点实验室/农业农村部华南优质稻遗传育种重点实验室(部省共建)/广东省水稻工程实验室,广州 510640
²东莞本色生物科技有限公司,广州 523588
³华南农业大学,广州 510642

通讯作者: ^*chengx@scau.edu.cn; fyq040430@163.com
作者简介:第一联系人：^# 共同第一作者
基金资助:
广东省农业科学院水稻研究所优谷计划(2023YG05);广东省农业科学院协同创新中心项目“智慧(数字)农业研究中心建设运行经费项目”(XTXM202201);广东省水稻育种新技术重点实验室项目(2023B1212060042)

Abstract

Abstract:

Cadmium(Cd) is an important heavy metal that endangers food security. In order to reduce the contents of Cd in rice grains, preventing rice from absorbing and transporting Cd is of great significance. This study took the high-quality indica rice variety Meixiangzhan 2, which had the largest planting area in South China, as the experimental material. Four treatments were set up: healthy soil + spraying water(T1), cadmium contaminated soil + spraying water(T2), cadmium contaminated soil+ spraying low concentration cadmium inhibitor(800-fold liquid) (T3), and cadmium contaminated soil+ spraying high concentration cadmium inhibitor (300-fold liquid)(T4). The effects of spraying different concentrations of cadmium inhibitor on rice yield, photosynthesis, and cadmium absorption were explored. The results showed that spraying cadmium inhibitors could significantly increase rice yield and biomass. Compared with T2 treatment, T3 and T4 treatments increased rice yield by 81.70% and 48.57%, respectively, and increased rice biomass by 53.14% and 24.32%, respectively. Net photosynthetic rate, stomatal conductance, intercellular CO₂ concentration, and transpiration rate increased by 9.72%, 42.76%, 7.30%, and 17.05%, respectively, in T3 treatment, but decreased no significantly in T4 treatment, compared with T2 treatment. There was no significant difference in Cd absorption between all parts of T3 treatment and T2 treatment, among them, the Cd contents in plump grains reduced by 33.11%, but the proportion of grain Cd in the total Cd absorption significantly decreased by 31.77%. This indicated that spraying 800-fold liquid of cadmium inhibitor on rice leaves could enhance photosynthesis, increase biomass, reduce Cd transport to grains, and increase grain yield.

Key words: rice, cadmium inhibitor, photosynthesis, heavy metal, cadmium

摘要：

镉(Cd)是一种危害粮食安全的重金属元素。为了降低水稻籽粒Cd含量,阻止水稻吸收和转运Cd具有重要意义。本文以华南地区种植面积最大的优质籼稻品种美香占2号为试验材料,设置健康土壤+清水喷施(T1)、镉污染土壤+清水喷施(T2)、镉污染土壤+喷施低浓度(800倍液)阻镉剂(T3)、镉污染土壤+喷施高浓度(300倍液)阻镉剂(T4)共4个处理,探讨喷施不同浓度阻镉剂对水稻产量、光合作用和Cd吸收的影响。结果表明,喷施阻镉剂能够显著增加水稻籽粒质量和生物量,与T2处理相比,T3和T4处理的籽粒质量分别增加81.70%和48.57%,生物量分别增加53.14%和24.32%。与T2处理相比,T3处理的净光合速率、气孔导度、胞间CO₂浓度和蒸腾速率分别增加9.72%、42.76%、7.30%和17.05%,但T4处理稍有减少,差异不显著。T3处理各部位的Cd吸收量与T2处理相比均无显著差异,其中实粒Cd含量降低33.11%,但籽粒Cd在总Cd吸收量中的占比显著降低31.77%。表明水稻叶面喷施适量阻隔剂能促进光合作用,增加生物量,减少Cd向籽粒转运,增加产量,其中以叶面喷施低浓度阻隔剂(800倍液)效果更好。

关键词: 水稻, 叶面阻镉剂, 光合作用, 重金属, 镉

CLC Number:

S511.05

LIAO Jiahui, PAN Ning, LU Chusheng, LAI Huai, MENG Xiangliang, CAI Haoyang, WANG Junjiang, WANG Xinyu, YIN Yuanhong, YE Qunhuan, CHENG Xiong, FU Youqiang. Effects of Leaf Spraying with Cadmium Inhibitor on Rice Yield and Cadmium Absorption[J]. China Rice, 2024, 30(5): 72-75.

廖嘉晖, 潘宁, 陆楚盛, 赖怀, 孟祥亮, 蔡昊炀, 王俊江, 王昕钰, 尹媛红, 叶群欢, 程雄, 傅友强. 水稻叶片喷施阻镉剂对产量和镉吸收的影响[J]. 中国稻米, 2024, 30(5): 72-75.

Figures/Tables 4

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Effects of Leaf Spraying with Cadmium Inhibitor on Rice Yield and Cadmium Absorption

水稻叶片喷施阻镉剂对产量和镉吸收的影响

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