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在喀拉喀什河流域冬小麦套种玉米高产攻关田内 ,研究了单产 15 0 0 0kg/ hm2 的小麦、玉米对氮、磷养分的吸收需求规律和土壤主要养分供给能力和动态变化 ,提出了具体施肥方案。结果表明 :两种作物氮、磷养分含量在整个生育期呈单峰曲线 ,小麦、玉米的氮磷需求高峰分别在孕穗—抽穗期和抽雄期 ;同时指出土壤养分供应不足是限制产量进一步提高的重要因子。
In the field of high-yield winter wheat intercropping corn in the Krakesh river basin, the demand of nutrient absorption of nitrogen and phosphorus of wheat and corn with a yield of 150 000 kg / hm2 was studied and the main nutrient supply capacity and dynamic change of soil were put forward. The specific fertilization scheme . The results showed that the nutrient contents of nitrogen and phosphorus in both crops showed a single peak curve during the whole growth period, and the peak of nitrogen and phosphorus demand in wheat and maize were at booting stage, heading stage and tasseling stage respectively. At the same time, it was pointed out that insufficient supply of soil nutrients limited the yield increase further Important factor.