氮肥对向日葵的增产效果研究

Research on Effect of Nitrogen Fertilizer on Sunflower Yield-increasing

向日葵施用氮肥增产效果明显,增产幅度为28.8%～51.8%,施氮量以92～115 kg/hm2为宜。在氮肥的施用方法上,氮肥总量的1/3作底肥与2/3现蕾期追肥效果最明显。

The yield-increasing effect about the application of nitrogen fertilizer on sunflower was obvious, the range of yield-increasing was from 28.8% to 51.8% ,the appropriate nitrogen volume was 92-115 kg/hm2. On the nitrogen fertilizing method ,the effect was the most obviously when using one-third of nitrogen total amounts as subsoil and two-thirds of nitrogen total amounts as additional ferlilizer, applied in squaring stage.