摘要
研究了氮肥施用量对单季杂高粳稻秀优5号产量的影响。结果表明,氮肥对秀优5号的苗、蘖和穗形成有明显的促进作用,氮肥施用量与结实率及千粒重呈负相关关系;施纯氮0～225 kg/hm^2,秀优5号单产随施氮量上升而增加;当氮肥用量超过225 kg/hm^2时,则产量随施肥量增加而降低,施肥效益也降低。秀优5号在中等土壤肥力条件下,最佳施氮量为施纯氮225 kg/hm^2左右。
The effect of nitrogenous fertilizer level on the hybrid japonica rice var. Xiuyou No. 5 were studied. The results showed： nitrogenous fertilizer is of great enhancement to the seedling, tiller, panicle of the hybrid japonica rice var. Xiuyou No. 5, and it is of negative correlation between nitrogenous fertilizer level and the seed setting, 1 000 seed weight. The product is arising with the increase of nitrogenous fertilizer when the pure nitrogenous fertilizer is below 255 kg/hm^2 . However, the product is decreased with the increase of nitrogenous fertilizer when the pure N is beyond 225 kg/hm^2. It is of the best effect to bestow pure N 225 kg/hm^2 in the middle of the middling of the soil fertility for the single-cropping of hybrid japonica rice var. Xiuyou No. 5.
出处
《河北农业科学》
2007年第2期69-70,共2页
Journal of Hebei Agricultural Sciences
关键词
杂交粳稻
秀优5号
氮肥施用量
Hybrid japonica rice
Xiuyou No. 5
Nitrogenous fertilizer
