摘要
以下辽河平原一组18年的定位试验为平台,研究长期不同施肥处理作物收获物中Fe、Mn、Zn、Cu含量及其分布。结果表明:作物收获物中微量元素含量表现为Fe>Mn、Zn>Cu,且玉米收获物各元素含量远高于大豆;处理间微量元素含量差异显著,表现为NPK+M>NPK>M>CK;作物收获物中微量元素含量与作物籽实或秸秆产量间有显著相关性,玉米收获物中Fe、Mn、Zn、Cu含量与秸秆产量的线性回归关系中R2分别为0.99、0.94、0.92、0.87,大豆收获物中Fe、Mn含量与秸秆产量的线性回归关系中R2均为0.97,Zn、Cu与籽实产量的线性回归关系中R2分别为1.00和0.97。不同施肥处理间微量元素分配存在变异,但总体仍表现为玉米收获物中微量元素主要分配在秸秆中,而大豆籽实富集了大量的微量元素。采用秸秆还田等养分循环再利用措施,可实现农田微量元素可持续发展,因而应在农村加强秸秆还田等养分循环再利用措施的应用。
The content and distribution of Fe, Mn, Zn and Cu in harvested crops under different long-term fertilization schemes were analyzed. Data from 18 years of continuous field trials in aquic-brown soils in a suburb of Shenyang, Northeast China were used in the study. Based on the study, the order of the trace elements in the harvested crops in relation to content is as follows： Fe〉 Mn, Zn〉Cu. The content of the trace elements in maize is higher than that in soybean. There are extreme differences in the content of trace elements among different fertilization treatments, generally occurring in the order of NPK＋M〉NPK〉M〉CK. There is a significant correlation between trace element content and grain yield/stalk yield. R2 regression trends of Fe, Mn, Zn and Cu contents in maize harvests and stalks yield are 0.99, 0.94, 0.92 and 0.87 respectively. R^2 regression trends of Fe and Mn content in soybean harvests and stalks yield are all 0.97, while that of Zn and Cu content in soybean harvests and grain yield are 1.00 and 0.97 respectively. The distribution of trace elements varies with fertilization treatment. In maize, trace elements are mainly concentrated in stalks, whereas they are concentrated in grains for soybean. Nutrient cycling like straw reuse is therefore an effective strategy for sustainable agro-ecosystem. Extensive and intensive application of nutrients recycling like plowing straw into the soil should therefore be supported.
出处
《中国生态农业学报》
CAS
CSCD
北大核心
2009年第6期1063-1068,共6页
Chinese Journal of Eco-Agriculture
基金
中国科学院知识创新项目(KZCX2-YW-407
KZCX2-YW-405)
国家科技支撑计划课题(2006BAD05B05)
沈阳环境工程重点实验室基金(ERCERR08014)资助
关键词
施肥模式
微量元素
养分循环
玉米
大豆
Fertilization scheme
Trace element
Nutrient cycling
Maize
Soybean
