摘要
对兰州市安宁区保护地蔬菜施肥现状和养分平衡进行了调查和分析。结果表明，目前蔬菜生产上肥料养分投入结构极不合理，氮磷钾养分投入比例Ｎ∶Ｐ２Ｏ５∶Ｋ２Ｏ为１００９∶４１４∶１；氮磷施用量过大，其投入量分别是需要量的５～１０倍和４～１５倍，而钾素养分投入量少，呈亏缺状态。肥料利用率很低，Ｎ、Ｐ利用率均不足１５％。
Fertilization condition and nutrient balance of vegetable planted soil under plastic shed in Anning district of Lanzhou were investigated and analyzed in the paper. The results showed that the structure of nutrients in fertilizers in the vegetable fields was out of proportion and the investment ratio of nitrogen, phosphorus and potassium. i. e. N∶P 2O 5∶K 2O, was 10.09∶4.14∶1. The amounts of nitrogen and phosphorus applied were far more than those of requirements, with the investment amounts as much as 5 to 10 times and 4 to 15 times of requirements respectively, on the other hand, the investment of potassium nutrient was less than that of requirement and the reserve of potassium in soil was not enough for vegetables.Besides, use efficiencies of nitrogen and phosphorus were both less than 15 %.
出处
《甘肃农业大学学报》
CAS
CSCD
1998年第2期190-193,208,共5页
Journal of Gansu Agricultural University
关键词
保护地
蔬菜
施肥
调查
兰州市安宁区
soil under plastic shed
vegetable fertilization
investigation
