中低产田水稻氮肥施用技术研究

Study of nitrogen fertilizer application techniques of middle and low-yield rice field

试验研究了宁夏灌区中低产田水稻氮肥基追比例对水稻产量的影响.研究结果表明:插秧稻氮肥65%基施、35%追施的产量最高,水稻产量为13 436.5 kg/hm2.50%基肥、50%追肥的产量次之,水稻产量为12 957.0 kg/hm2.直播稻氮肥50%基施、50%追施的产量最高,水稻产量为7 403.0 kg/hm2.氮肥65%基施、35%追施的产量次之,水稻产量为7 253.5 kg/hm2.

The influences of basic fertilizer and topdressing fertilizer percentage of N on the yield of rice in lowmiddle producing farmland in Ningxia irrigation region were studied. The results showed that： the highest rice yield was at 13 436.5 kg/hm^2 with the application of 65% basic fertilizer and 35% as topdressing fertilizer for transplamed ricer while with the application of 50% basic fertilizer and 50% as topdressing fertilizer, the rice yield was at 12 957.0 kg/hm^2. For direct seeding rice, the highest rice yield was 7 403. 0 kg/hm^2 with the application of 50% as basic fertilizer and 50% as topdressing fertilizer, while with the application of 65% as basic fertilizer and 35% as topdressing fertilize, the rice yield was at 7 253. 5 kg/hm^2.