不同钾肥对水稻镉吸收和运移的影响  

Effect of Different Potash Fertilizers on Cd Uptake and Translocation in Rice

作　　者：衣纯真[1] 傅桂平[1] 张福锁[1] 

机构地区：[1]中国农业大学资源和环境学院,北京100094

出　　处：《中国农业大学学报》1996年第3期65-70,共6页Journal of China Agricultural University

摘　　要：研究了镉污染的水稻土上三种钾肥，即KCl，K2SO4和KNO3对水稻在不同生育期吸收累积Cd的影响。结果表明：Cl－对水稻吸收Cd有促进作用，而且K＋和Cl－对水稻吸收Cd的促进作用，在不同生育期表现的程度不一样。SO42－显著降低水稻对Cd的吸收，降低糙米中Cd的含量。在稻田施加KCl，增加了土壤交换态Cd的含量。Pot experiments were conducted to study the effects of three potash fertilizers, namely, KCl,K2SO4 and KNO3, on Cd uptake by rice. The results indicated that potassium chloride stimulated Cd uptake of rice on the Cd-contaminated siol, but the increment induced by KCl supply varied with growth stages. SO42- reduced the Cd uptake of rice significantly and lowered Cd content in unpolished rice grains.KCl inereased the soil exchangable-Cd concentration.

关 键 词：水稻 钾肥 生育期 镉 吸收 运移 

分 类 号：S511[农业科学—作物学] S143.72