叶面阻控剂对杂交中稻的降镉及增产增收效果  

Effect of Leaf Inhibitor on Cd Reduction and Yield Increase in Mid-Season Hybrid Rice

作　　者：李娟 LI Juan(Agriculture and Rural Affairs Bureau of Anxiang County,Anxiang 415600,PRC)

机构地区：[1]安乡县农业农村局,湖南安乡415600

出　　处：《湖南农业科学》2023年第1期52-54,63,共4页Hunan Agricultural Sciences

基　　金：国家重点研发计划子项(2016YFD0800707-2-3)。

摘　　要：为了验证中量元素肥料对杂交中稻的降镉增产增效作用,选择叶面阻控剂“归欣甲”水剂作为降镉肥料,在常规施肥的基础上,分别在水稻分蘖末期和灌浆期叶面喷施“归欣甲”水剂(T1和T2处理用量分别为4500和3000 mL/hm^(2)),以不喷施叶面阻控剂和清水作为对照处理进行杂交中稻大田试验。结果表明:T1和T2处理的稻米镉含量分别为0.146和0.162mg/kg,低于国家限量标准(0.2 mg/kg),分别比CK降低0.189和0.173 mg/kg,降幅达56.42%和51.64%,差异极显著;杂交中稻的株高、有效穗、每穗实粒数、结实率和千粒重略有增加;T1和T2处理的稻谷产量分别为7920和7800 kg/hm^(2),分别比CK增产6.88%和5.26%,差异极显著;经济效益分别比CK增加1092和858元/kg。这说明施用叶面阻控剂“归欣甲”水剂对杂交中稻稻米的降镉及增产增收效果显著,建议在中低度镉污染农田大面积推广应用。In order to explore the in?uence of medium element fertilizer on cadmium reduction,yield and economic bene?ts of midseason hybrid rice,foliar inhibitor"Guixinjia"water agent as cadmium reduction fertilizer was sprayed at 4500(T1)and 3000 mL/hm^(2)(T2),respectively at both the end of tillering period and the filling period based on conventional fertilization,with conventional fertilization plus no foliar inhibitor and water as CK in a?eld experiment.The results showed:in T1 and T2,the rice cadmium content was 0.146 and 0.162 mg/kg,respectively,below the national limit standard(0.2 mg/kg),and 0.189 and 0.173 mg/kg lower than CK by56.42%and 51.64%,respectively,reaching extremely signi?cant differences;the plant height,effective panicle,the number of?lled grains per panicle,seed set rate and 1000-grain weight slightly increased;the grain yield in T1 and T2 was 7920 and 7800 kg/hm^(2),respectively,6.88%and 5.26%higher than CK,reaching extremely signi?cant differences;the economic pro?ts increased by 1092 and858 yuan/kg,respectively compared with CK.It demonstrates that the application of foliar inhibitor"Guixinjia"water agent in midseason hybrid rice has a signi?cant effect on cadmium reduction and yield and income increase,which can be widely applied in low to medium Cd-contaminated?elds.

关 键 词：叶面阻控剂 中量元素肥料 杂交中稻 镉 产量 经济效益 

分 类 号：S143.68[农业科学—肥料学] S511.32[农业科学—农业基础科学]