土壤中Cd、P、Zn含量对水稻产量和植株中矿物浓度的影响

YIELD AND MINERAL CONCENTRATION OF RICE AS AFFECTED BY THE CONTENT OF Cd, P AND Zn IN SOIL

摘要:

在温室中进行了剖析添加的Cd、P、Zn对稻谷产量、植株和稻草中的矿物含量以及糙米中Cd的浓度的研究。P增加了稻谷和植株产量,而Cd、Zn和P-Zn的交互作用使其降低。稻谷和植株产量有类似的线性回归方程式,其稻谷的线性回归方程为: Y=17.24+0.0466(P)-0.1850(Cd)-0.1115(Zn)-0.0005(P-Zn) 其R²=0.97^**,式中Y为稻谷产量(克/株);P为添加的P浓度(毫克/公斤);(Cd)为添加的Cd浓度(毫克/公斤);(Zn)为添加的Zn浓度(毫克/公斤);(P-Zn)为P和Zn的交互作用。所有处理均明显地影响着稻草中矿物元素的含量。粕米中的Cd浓度随着添加的Cd、P、Zn浓度的增加而增加;但多元回归分析表明只有Cd的影响是显著的。粕米中Cd的浓度与收获时用0.05M HCI所提取的风干土中的Cd浓度有极显著相关性(Y=0.75^**).对糙米中Cd浓度的评价进行了简要的讨论。

Abstract:

The effect of the addition of Cd,P and Zn compounds on the yields of rice grains,plant shoots and the content of mineral nutrients in straw and Cd concentration in brown rice were studied in the greenhouse.P increas}ad the yields of rice grains and plant shoots,while Cd,Zn and interaction of P and Zn decreased them.There are similar 1near regression equations for the yields of rice grain and plant shoots.The linear regresaion equation for rice grain is:Y=17.24+0.0466(P)-0.1850(Cd)-0.1115(Zn)-0.0005(P-Zn)with R²=0.97^**,where Y is grain yield (g/plant);(P) is concentration of added P (mg/kg);(Cd) is concentration of added Cd (mg/kg);(Zn) is concentration of added Zn (mg/kg);(P-Zn) is interaction of P and Zn.The mineral nutrients in rice straw were markedly affected by all treatments.The Cd concentration in brown rice increased with the increase of concentration of Cd,Zn and P added.However multiple linear regression analysis shows that only the Cd effect is the most significant.The Cd concentration in brown rice shows a highly significant correlation (r=0.75^**) with Cd in air-dried soil at harvest extracted by 0.05 M HCl.The toxicological evaluation of Cd concentration in brown rice are discussed.