Ecosystem of grassland and farmland 草原农田生态系统
The use of fertilizer in modern agriculture broke the close circle of nutrient in the traditional farmland ecosystem.
近代农业中化肥的施用打破了传统农业生产体系中封闭的物质循环。
In this paper, the recent researches on the movement and transport of the water, solute, nutrient and bed-load in farmland ecosystem are reviewed and the research prospects in future are pointed out.
对近年来国内外农田生态系统中的水分、溶质和养分迁移的研究工作进行了评述，并指出了需进一步研究的问题。
The energy inputs and their structure, efficiencies, and the relationship between energy input and output in the farmland ecosystem of Jianyang County were studied in this paper.
本文从生态学能量流的角度研究了简阳县不同时期农田系统能量投入量、投能结构，投能效率及能量投入产出关系。
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