期刊论文

Effects of High Nitrogen Rate Combined With High Plant Density on Yield Formation and Nitrogen Utilization Efficiency of Xiangliangyou900

中文

核农学报

1000-8551

2019

33

8

1602-1610

10.11869/j.issn.100-8551.2019.08.1602

现代农业产业技术体系建设专项(CARS-01-89) 海南农业科技示范推广项目(琼农计财[2014]121号) 海南省自然科学基金(318QN295).

本校为第一机构

为探明湘两优900在热带稻区的高产性和适应性,在海南三亚进行4个施氮水平(0、150、225、300kg·hm~(-2))和2个移栽密度(25.0×10~4、16.7×10~4hills·hm~(-2))大田栽培试验,研究施氮水平和移栽密度对湘两优900产量形成和氮肥利用率的影响。结果表明,施氮水平和移栽密度对湘两优900产量影响显著,产量随着施氮水平和移栽密度的提高而显著增加,以施氮量300kg·hm~(-2)与移栽密度16.7×10~4hills·hm~(-2)组合的产量最高(15.32t·hm~(-2)),其增产优势主要表现为有效穗数多,地上部干物重和叶面积指数(LAI)大,叶绿素含量和净光合速率(Pn)高。施氮水平与移栽密度对氮肥吸收利用效率有影响,且施氮水平起...

In order to explore high yield and adaptability of super hybrid rice Xiangliangyou900 in tropical environment in Sanya,Hainan.A field experiments with four levels of nitrogen (N) application rate (0,150,225,300 kg·hm~(-2)) and two planting densities (25.0×10~4,16.7×10~4 hills·hm~(-2)) was conducted to study effects of N application rate and plant density on yield components and nitrogen utilization efficiency of super hybrid rice Xiangliangyou900.The results showed that grain yield of super hybrid rice Xiangliangyou900 was significantly aff...