期刊论文

中文

中国水稻科学

1001-7216

2015

29

6

628-636

10.3969/j.issn.1001-7216.2015.06.009

国家水稻产业技术体系资助项目（CARS-01-34）；

本校为第一机构

针对长江流域双季稻机插秧发展缓慢的问题,以常规早稻品种中嘉早17为材料,在大田条件下研究了栽插密度与氮肥用量对机插双季稻产量的影响.结果表明,机插双季稻产量并未随栽插密度增加而显著增加.以高密(36.4万穴/hm~2)+高氮(施纯氮量早稻175.5 kg/hm~2,晚稻189 kg/hm~2)处理产量最高,其中,早稻为7.80 t/hm~2,晚稻为9.05 t/hm~2,但与高密+中氮(施纯氮量早稻110 kg/hm~2,晚稻140 kg/hm~2)处理产量差异不显著,且栽插密度和施氮量间互作效应不显著.氮肥利用率随氮肥用量增加而下降,随栽插密度增加而提高.其中,氮肥吸收利用率中氮比高氮平均增加13.26%,高密度比低密度平均增加17.53%.由此可见,提高栽...

Aiming at the slow development of rice mechanical transplanting in the Yangtze River Valley,we explored the effects of mechanical transplanting densities and nitrogen application on yield formation and nitrogen use efficiency (NRE)in a field experiment with the conventional variety Zhongjiazao1 7 as material.The results showed that the grain yield didn’t significantly increase with the increasing levels of transplanting density.At the high density (36.4 hill/m2 ) and high nitrogen rates (1 75 .5 kg/hm2 in early season,189 kg/hm2 in late season...