摘要
研究了大田条件下氮肥水平(常规施氮肥(187.5 kg/hm2)、减氮28%(135.0 kg/hm2)和不施氮肥(0 kg/hm2)对不同基因型水稻(粤晶丝苗2号、桂香占、华优8305和天优998)的源库特性的影响。结果表明,减氮不会导致华南早晚兼用型水稻产量显著降低在于其能维持或促进水稻的源库协调性。与常规施氮比较,减氮28%有利于提高粤晶丝苗2号、桂香占及华优8305的产量,增幅分别为11.99%,5.51%,6.46%,主要归因于减氮28%能增强后期叶片光合或茎鞘转运而有利于稳定高产形成。减氮28%有利于提高粤晶丝苗2号和桂香占库容和粒叶比,提高华优8305库容有效充实度,而对天优998无显著影响。
Effects of N fertilizer （Conventional N （187.5 kg/ha）,reduction of N by 28%（135.0 kg/ha） and without N（0 kg/ha）） on rice sink and source characteristics were studied using four varieties （Yuejingsimiao 2, Guixiangzhan ,Huayou 8305 and Tianyou 998 ） in field experiment .Compared by conventional N ,reduction of N by 28%would maintain or promote the rice source and sink coordination ,which resulted in no significant decrease in yield.Reduction of N by 28%increased grain yield by 11.99%,5.51%and 6.46%for Yuejingsimiao 2,Guixian-gzhan and Huayou 8305 , rexpectively , due to enhancement of photosynthetic or the transfer ability of sheath and stem .Reduction of N by 28%improved sink capacity and ratio of spikelets No .and leaf area in Yuejingsimiao 2 and Guixiangzhan ,improved available filled ratio of sink in Huayou 8305 , while there was no significant difference in Tianyou 998 .
出处
《华北农学报》
CSCD
北大核心
2013年第5期206-212,共7页
Acta Agriculturae Boreali-Sinica
基金
国家"十一五"科技支撑计划项目(2007BAD89B14)
广东省农业攻关重点专项(2006A20303001)
广东省农业攻关项目(2004B20101007)
关键词
华南早晚兼用型水稻
产量
减氮
源库特性
Early/late season rice
Yield
Nitrogen reduction
Source and sink characteristics
