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采用实地访问和田间调查的方式,对江苏省句容市水稻—大棚草莓轮作农田生态系统施肥状况进行调查,并对氮、磷、钾输入输出的数量特征及其平衡状况进行了分析。结果表明,系统养分投入结构以有机养分为主,其中氮、磷、钾分别占各项总输入量的80.01%、57.65%和55.50%;氮、磷、钾比例为1∶0.28∶0.70,基本合理;氮、磷、钾盈余率分别为34.27%、264.47%和33.12%;磷投入偏高,应适当降低磷的投入。
A field survey and field survey were conducted to investigate the fertilization status of strawberry rotation in paddy-greenhouses in Jurong, Jiangsu Province. The quantitative characteristics of input and output of nitrogen, phosphorus and potassium and their balance were analyzed. The results showed that the structure of nutrient input was dominated by organic nutrients, of which nitrogen, phosphorus and potassium accounted for 80.01%, 57.65% and 55.50% of the total input respectively; and the ratio of nitrogen, phosphorus and potassium was 1: 0.28: 0.70, Reasonable; nitrogen, phosphorus and potassium surplus rates were 34.27%, 264.47% and 33.12%; phosphorus investment is high, should be appropriate to reduce the input of phosphorus.