近几年我国在水稻、小麦等大田作物上施用控释肥增产效应研究多有报道，但在棉花上的应用研究报道较少。
In recent years, many studies reported the effects of CRFs on rice, wheat and other field crops, but less reports about the application on the cotton were issued.
然而基于不同粮食作物，来定量研究现行粮食补贴政策增产效应的文献还比较有限。
However, the literature, based on different grain crops to research the yield effect of current grain subsidies policy by quantitative methods, is rare.
本文研究了腐植酸复合肥对草莓增产作用的几种生理效应。
This thesis studied Several physiological effect of humic acid compound circuit in strawberry.
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