氮、锌肥配施对小白菜产量和品质的影响

Effects of combined application of N and Zn on the yield and quality of Chinese cabbage

研究了山西省石灰性褐土上施用氮、锌肥对小白菜（brassica campestris ssp．chinensis）产量和品质的影响。结果表明，在磷、钾肥底肥的基础上，施用氮、锌肥均有一定的增产作用，增产效果为氮〉锌，但过量施锌导致产量下降。在施氮基础上适量配施锌肥，不仅利于增产，而且利于品质的改善。在本试验条件下得出的小白菜高产、优质施肥方案为每公顷施用尿素400～500kg、硫酸锌100kg。

A field experiment was conducted on calcareous cinnamon soil of Shanxi Province to study the effects of N and Zn fertilizer on yield and quality of Chinese cabbage （ brassica campestris ssp. chinensis ）. The results showed that apphcation nitrogen and zinc fertilizer could increase the yield of Chinese cabbage on the basis of combined application of P and K, the effect of N and Zn on cabbage yield was N 〉 Zn. However heavy zinc fertilization decreased yield. Quality of cabbage was improved to certain extent by combined N and Zn fertilizer. Under the condition of this experiment the optimum application rates was： urea 400 N 500 kg/hm^2, zinc sulfate 100 kg/hm^2.