摘要
在三江平原上,测定42个小区中玉米、大豆、小麦籽实Fe、Mn、Cu和Zn含量和土壤中各形态Fe、Mn、Cu和Zn含量。通过相关分析和通径分析,探讨了土壤中各形态Fe、Mn、Cu和Zn的生物有效性,旨在为该地区合理施用微量元素提供科学依据。试验结果表明,玉米、大豆和小麦籽实含Fe、Mn、Cu和Zn量与土壤中有效态和交换态Fe、Mn、Cu和Zn含量呈显著或极显著正相关。有机态Fe、Mn、Cu和Zn含量与玉米、大豆和小麦籽实Fe、Mn、Cu和Zn含量也有很好的相关关系。交换态对有效态Fe、Mn、Cu和Zn影响最大,其次是有机质结合态。铁锰氧化物结合态Fe、Cu对有效态Fe、Cu及碳酸盐结合态Mn、Zn对有效态Mn、Zn具有一定正效应。而残留态Fe、Cu对有效态Fe、Cu和铁锰氧化物结合态Mn对有效态Mn产生负效应。
The experimental aimed at the contents of Fe, Mn, Cu and Zn in the seeds of wheat, soybean and maize, and the contents of Fe,Mn, Cu and Zn in different forms in soil, and the data were obtained from 42 experimental plots in the Three River Plain. This paper illustrated the bio-availability of Fe, Mn, Cu and Zn in different forms in soil in order to find a scientific method for application of trace elements in the Three River Plain. The correlated analyses showed that the contents of available, exchangeable and organic Fe, Mn, Cu and Zn in soil had significant or very significant positive correlations with those in the seeds of wheat, soybean and maize. The results of path analyses showed that the effect of exchangeable forms on available Fe, Mn, Cu and Zn was most, followed by the organic form. The oxide bound Fe, Cu to available Fe, Cu and carbonate bound Mn, Zn to available Mn, Zn showed positive effect, but residual Fe, Cu to available Fe, Cu and oxide bound Mn to available Mn show negative effect.
出处
《土壤》
CAS
CSCD
北大核心
2009年第2期196-200,共5页
Soils
基金
黑龙江教委项目(9541068)资助
