硅基叶面阻控剂对水稻的控镉效应

doi:10.14088/j.cnki.issn0439-8114.2024.06.004

摘要/Abstract

摘要： 在中轻度Cd污染区域开展大田试验,探索不同用量的硅基叶面阻控剂对土壤有效Cd、水稻（Oryza sativa L.）不同器官Cd含量及Cd转运的影响。结果表明,叶面阻控剂不能降低土壤有效Cd含量,但能调控Cd在水稻器官中的转运与富集,与不施叶面阻控剂对照相比,水稻根、茎、叶与稻米中Cd含量分别降低13.06%~27.03%、17.39%~36.96%、14.89%~42.55%、11.11%~32.83%,水稻对Cd的富集从高到低依次为根、茎、叶、稻米。水稻植株中Cd从根到茎（TF_根-茎）、茎到叶（TF_茎-叶）、叶到稻米（TF_叶-稻米）的转运系数分别为0.36~0.42、0.47~0.53、0.42~0.50,其中根到茎的转运系数最低,且随叶面阻控剂用量的增加其转运系数逐渐降低。施用一定量的叶面阻控剂在一定程度上能提高水稻产量,从经济成本和降镉效果等因素综合考虑,用量为4 500 mL/hm²时,成本低廉且效果较佳。

关键词: 硅基叶面阻控剂, 水稻（Oryza sativa L.）, 污染土壤, 转运系数, 产量, 控镉效应

Abstract: A field experiment was carried out to investigate the effects of different concentrations of silicon-based leaf inhibitors on available Cd in soil, and the content and the transport of Cd in different organs of rice （Oryza sativa L.）. The results showed that leaf inhibitors could not reduce the content of available Cd in soil, but could regulate the transport and accumulation of Cd in rice organs. Compared with the control without leaf inhibitor, the Cd contents in roots, stems, leaves and grain of rice with leaf inhibitor decreased by 13.06%~27.03%, 17.39%~36.96%, 14.89%~42.55%, and 11.11%~32.83%, respectively. The order of Cd accumulation in rice from high to low was root, stem, leaf and grain. The transport coefficients of Cd from root to stem （TF_root-stem）, stem to leaf （TF_stem-leaf） and leaf to rice （TF_leaf-Rice） were 0.36~0.42, 0.47~0.53 and 0.42~0.50, respectively, the transport coefficient from root to stem was the lowest, and it decreased gradually with the increase of the dosage of inhibitor. The yield of rice could be increased by applying a certain amount of leaf inhibitor. Considering the comprehensive factors such as economic cost and the effect of reducing cadmium, the cost was low and the effect was better when the dosage was 4 500 mL/hm².

Key words: silicon-based leaf inhibitor, rice（Oryza sativa L.）, polluted soil, transport coefficient, yield, effect of Cd control

中图分类号:

X53
S511

康兵, 顾祝禹, 皮杰, 黄博阳, 李文超, 唐东海. 硅基叶面阻控剂对水稻的控镉效应[J]. 湖北农业科学, 2024, 63(6): 22-26.

KANG Bing, GU Zhu-yu, PI Jie, HUANG Bo-yang, LI Wen-chao, TANG Dong-hai. Effect of silicon-based leaf inhibitor on Cd control in rice[J]. HUBEI AGRICULTURAL SCIENCES, 2024, 63(6): 22-26.

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