摘要
了解下辽河平原地区不同施肥模式对于土壤微量元素含量及其变化的影响。利用下辽河平原18年的定位试验,对不同施肥处理下土壤中Fe、Mn、Zn、Cu、Pb的含量及其变化进行研究。下辽河地区所测微量元素含量均略低于全国平均水平,长期采用常规施肥方式不会对土壤造成污染;除了Fe以外,试验前后所测元素的变化量在施肥处理与CK间均有显著差异,而各元素的变化量在养分循环处理与化肥处理间无显著差异;长期试验过程中,对照处理除了Zn以外均表现出下降的趋势,施肥处理除Cu以外均表现为增加的趋势;重茬玉米地中Cu含量比豆茬玉米地高。下辽河平原地区不同施肥模式下微量元素含量均低于国家限定标准,不会对土壤造成污染;不同施肥模式下微量元素变化不同,但养分循环再利用能够增加农田中微量元素的输入,对于维持农田生态系统的可持续发展有重要意义。
Objectives of this paper are to elucidate the effect of different fertilization treatments on the contents and changes of trace elements in acquic brown soil. The effect was studied by a consecutive 18 years field trial on aquic brown soil in Shenyang suburb of Northeast China. The contents of trace elements in this area were lower than that of the national average, and there is no risk of pollution on soil under those fertilizations. Changes of contents of measured elements ex- cept Fe in soil between fertilization treatments and the control were significant, and there were no significant difference be- tween the fertilizer treatment and the nutrient cycling treatment in those changes. All the measured elements except Zn de- clined during the trial under the control treatment, while all the measured elements except Cu increased under fertilization treatments. The content of Cu in the soil with continuous maize stubble was higher than that in the soil with soybean stub- ble. The contents of trace elements under different fertilization treatments in the lower reach of Liaohe Plain were lower than the environment quantity standard for soils, so those fertilization treatments can not make damage to the soil for a long time;And there are some differences in the changes of trace elements among treatments, while nutrients cycling can im- prove the inputs of trace elements in agroecosystem and has an important effect on the sustainable of agriculture.
出处
《华北农学报》
CSCD
北大核心
2009年第B08期195-200,共6页
Acta Agriculturae Boreali-Sinica
基金
中国科学院创新项目(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)
关键词
微量元素
施肥
养分循环
潮棕壤
茬口
Trace elements
Fertilization
Nutrients cycling
Aquic brown soil
Stubble
