期刊论文、会议论文

中文

中国稻米

1006-8082

2015

4

163-169

全国第十六届水稻优质高产理论与技术研讨会

全国第十六届水稻优质高产理论与技术研讨会论文集

2015-08-25

贵阳

中国作物学会

10.3969/j.issn.1006-8082.2015.04.037

国家现代农业产业技术体系建设“水稻栽培与土壤岗位科学家”项目（2011-2015）；

本校为第一机构

以两优培九、Y两优1号、玉香油占和黄华占为材料,研究了施氮量对华南双季超级稻产量和干物质生产的影响。结果表明,施氮量对产量、有效穗数、每穗粒数和总颖花数的影响达显著水平,对结实率和千粒重的影响不显著,2011年N2（225 kg/hm^2）条件下的产量显著高于N1（112.5 kg/hm^2）,早、晚稻增幅分别为6.33%-13.39%和11.53%-25.06%,而2012年N1（161-176 kg/hm^2）和N2之间的产量差异不显著;与N0相比,增施氮肥可以显著增加干物质量,提高作物生长速率,但2012年N1和N2之间差异不显著。2年各品种N1的氮肥利用率要高于N2,其中氮肥偏生产力达到显著水平。因此,华南双季稻区早、晚稻在施氮量为161-176 kg/...

In order to study the effect of nitrogen rate on grain yield and dry matter for double cropping super rice in South China, field experiments were conducted with Liangyoupeijiu, Yliangyou 1, Yuxiangyouzhan and Huanghuazhan as materials. The results showed that there was significant difference in effective panicles, grains per spike, spikelets per m 2 and grain yield, however, there was no significant difference in grain filling rate and 1000-grain weight. Compared with N1 treatment, the grain yield of early rice and late rice cultivars in N2 treatment were significantly increased by 6.33%~13.39...