关键词: 甬优1540, 施氮量, 产量, 群体结构, 密度

Abstract:

 Yongyou 1540 is the main variety of single-season rice in southwest Zhejiang province in recent years. The results of different nitrogen application rates and planting densities showed that the nitrogen fertilizer requirement of Yongyou 1540 is large, and the application of enough nitrogen fertilizer is the key to increase yield. Under the same fertilizer application rate, the effect of different planting densities on yield was not significant, but the nitrogen fertilizer application rate had a very significant effect on the yield. In production, under the premise of applying enough phosphorus and potassium in vegetable-rice rotation field, the suitable pure nitrogen was 105 kg/hm2, and planting density was 185 000 /hm2.

Key words: Yongyou 1540, nitrogen application rate, yield, population structure, planting density