北京地区蔬菜施肥的问题与对策

目前北京地区蔬菜施肥中氮，磷，钾养分比例不协调，土壤养分收支不平衡，氮，磷盈余而钾不足，这不仅造成蔬菜品质的下降和对环境的污染。也使菜地发生次生盐渍化，并使蔬菜易发生病害，采用土壤诊断与植株诊断相结合的平衡施肥技术，是解决上述问题的有效措施，文章提出了今后蔬菜施肥中需要研究的问题。

The Problems and Countermeasures of Vegetable Fertilization in Beijing

The problems concerning vegetable fertilixation were investigated in Beijing suburb. The unappropriate ratio of N, P and K applied, and the unbalance between input and output for soil nutrient poot were the most serious problems. This led to in dectease vegatable quality, environment at pollution,soll salinization and disease develop-ment. Balanced fertilization, by combination of soil testing with plant diagnosis, is the effective measure to solve the problems in vegetable fertilization. The topics which should be studied further in the respects were also discussed in this paper.