安康市设施蔬菜施肥现状及土壤养分累积特性研究

目的]探索安康市设施蔬菜施肥现状及土壤养分累积特性。方法]调查安康市40余个塑料大棚蔬菜的施肥现状,并测定土壤养分含量。结果]结果表明:当地过量施氮磷现象比较普遍,而钾肥施用量相对不足;土壤中的全氮、有效氮、有效磷及有机质含均明显高于露地,而pH值低于露地。结论]安康市设施蔬菜化肥施用氮磷钾比例明显失调,研究含量合理的施肥数量和比例等问题对于安康市设施蔬菜生产意义重大。

Study on Fertilizer Application Status and Soil Nutrient Accumulation of Greenhouse Vegetable in Ankang City

Objective The aim was to study the fertilizer application status and soil nutrient accumulation characters of greenhouse vegetable.Method Fertilizer application status in more than 40 greenhouses in Ankang city was investigated and their soil nutrient contents were determined.Result Result showed that over-application of nitrogen and phosphorus was common and the application of potassium was lack.The levels of total N,available N,available P and organic matter in greenhouse were significantly higher compared with those of the cultivated soils in open field.But pH in greenhouse was lower.Conclusion Significant maladjustment of N,P and K application ratio existed in greenhouse vegetable in Ankang.It had important significance to study the rational fertilizer application ratio of greenhouse vegetable in Ankang.