期刊论文

中文

杂交水稻

1005-3956

2016

31

4

47-53

10.16267/j.cnki.1005-3956.201604019

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

本校为第一机构

在湖南长沙以超级稻Y两优1号为材料,研究了机插秧条件下栽插密度和施氮量对产量表现及氮肥利用率的影响。结果表明:产量随机插密度增加而增加,随施氮量的增加先增后降,机插密度和施氮量均通过增加有效穗数来增加产量;产量最高的处理组合为N1D1(施氮量170 kg /hm~2, 密度36.4万穴/hm~2, 产量9.57 t /hm~2), 其次为N1D2(施氮量170 kg /hm~2, 密度为28.6万穴/hm~2, 产量9.45 t /hm~2)和N2D1(施氮量240 kg /hm~2, 密度为36.4万穴/hm~2, 产量9.38 t /hm~2) 。降低施氮量或增加机插密度能提高氮肥吸收利用率和氮肥偏生产力。在施氮量为170 kg /hm~2、机插密度为28.6万~ 36.4万穴/hm~2条件下,既可以获得...

Using Y Liangyou 1（ a super hybrid rice） as the material,the effects of nitrogen rate and planting density under the mechanized transplanting conditions were studied on grain yield and N-use efficiency at Changsha,Hunan Province. The results showed that the grain yield increased with the increasing of density. With the increasing of the amount of nitrogen application,the grain yield of Y Liangyou 1 increased at a N rate of 170 kg / hm^2,and then reduced at a N rate of 240 kg / hm^2. Increasing nitrogen rate and mechanized transplanting densit...