期刊论文

Effects of Nitrogen Rate on Grain Yield and Nitrogen Use Efficiency of Different Phases of Super Hybrid Rice Varieties

中文

杂交水稻

1005-3956

2016

31

6

59-64

10.16267/j.cnki.1005-3956.201606019

超级杂交稻百、千、万高产攻关示范工程

本校为第一机构

以超级杂交稻两优培九、Y两优1号、Y两优2号和Y两优900及超高产杂交稻苗头品种超优千号为材料,研究了施氮量(0,210,300,390 kg/hm~2)对不同时期超级杂交稻产量和氮肥利用率的影响。结果表明,超优千号和Y两优2号产量较高,其后依次为Y两优900、Y两优1号和两优培九。不同氮肥水平下,两优培九和Y两优1号的产量随施氮量增加呈现先增加后降低趋势,均在施氮量300 kg/hm~2下达到最高;其余品种的产量则随施氮量增加而增加,但施氮量390 kg/hm~2处理与300 kg/hm~2处理产量差异不显著。各品种氮肥利用率均随施氮量增加而降低,在施氮量300 kg/hm~2处理下达到了高产高效的平衡。较高的干物质积累和收获指数是高...

Using super hybrid rice varieties Liangyou Peijiu, Y Liangyou 1, Y Liangyou 2 and Y Liangyou 900 and a promising super hybrid rice variety Chaoyou 1000 as the materials, the effects of nitrogen rate （0, 210, 300 and 390 kg/hm^2） were studied on grain yield and N-use efficiency of different phases of super hybrid rice varieties. The results showed that Chaoyou 1000 and Y Liangyou 2 had higher grain yields, followed orderly by Y Liangyou 900, Y Liangyou 1 and Liangyou Peijiu. Under different nitrogen rates from 0 to 390 kg/hm^2, Liangyou Peijiu...