氮素施用比例对双季超级稻产量和氮素吸收、利用的影响

摘要

Effects of the nitrogen basic-tiller and panicle fertilizer application ratio on the yield and nitrogen using efficiency were studied with super early and late rice Ganxin 203 and Ganxin 688 as materials. The results showed that in the early rice 180 kg/hm2 and late rice 232. 5 kg/hm2 nitrogen level, the N (8∶ 2) and N (7∶ 3) treatment had the highest biomass,grain yield, total N uptake and N using efficiency in early rice, while the N (6∶4) treatment had the highest biomass, grain yield, total N uptake and N using efficiency in late rice.%以超级早、晚稻品种淦鑫203和淦鑫688为材料,研究了氮素基蘖肥:穗肥的施用比例对产量及氮肥利用率的影响.结果表明,在早稻180 kg/hm2和晚稻232.5 kg/hm2的施氮水平下,早稻在N(8∶2)和N(7∶3)、晚稻在N(6∶4)时的生物产量、稻谷产量、总吸氮量、氮肥利用率最高.