马铃薯氮肥基追肥比例试验初报

通过田间试验研究了不同氮肥基追施比例对马铃薯产量的影响.结果表明,马铃薯在总施氮量相同的情况下,氮肥60％作基肥、40％作追肥处理单株结薯数、单株产量均高于氮肥全部基施处理,且该处理单位面积产量最高,较氮肥全部基施处理增产13.5％.因此,在当地马铃薯生产中氮肥60％基施、40％追施的施肥效果最佳.

Preliminary Report on Experiment of Base and Topdressing Proportion of Nitrogen Fertilizer for Potato

A field experiment was conducted to study the effects of different base and topdressing proportions of nitrogen fer- tilizer on the yield of potato. The results showed that under the condition of applying same amount of nitrogen fertilizer in total for potato, the tuber number and the yield per plant with the treatment of 60% of the nitrogen fertilizer as the base fertilizer and 40% of that as the topdressing were both higher that those of the treatment with all the nitrogen fertilizer as the base fertilizer. Furthermore, the per unit area yield of the treatment was the highest, an increase of 13.5% compared with that of the all base fertilizer treatment. So the effect of the nitrogen fertilizer application with 60% as the base and 40% as the topdressing was optimum in the local potato production.