期刊论文

Effects of low nitrogen rate combined with high plant density on yield components and photosynthetic characteristics of machine-transplanted late rice

中文

南方农业学报

2095-1191

2019

50

3

546-553

10.3969/j.issn.2095-1191.2019.03.15

国家重点研发计划项目（2017YFD0301503）；

本校为第一机构

【目的】探明低氮密植对机插晚稻产量形成和光合特性的影响,为推广低氮密植栽培技术提供理论依据。 【方法】在大田试验条件下,采用裂区设计,以杂交稻泰优390和常规稻湘晚籼13为材料,设低氮高密(N 120 kg/ha、 36.36万穴/ha)和常规栽培(N 150 kg/ha、28.57万穴/ha)2种氮肥密度水平,测定不同氮肥密度处理下机插晚稻的产量及其构成因素、茎蘖动态、干物质含量、主要生育时期叶面积指数和叶绿素相对含量(SPAD值)及齐穗期叶片的光合特性参数。【结果】与常规栽培相比,低氮高密处理下泰优390产量降低5.56%,但差异不显著(P>0.05,下同),湘晚籼13产量无显著变化;低氮高密处理机插晚稻的有效穗数、单位面...

【Objective】In order to provide theoretical basis for popularizing the planting technique of nitrogen-decreasing and density-increasing,the effects of low nitrogen rate combined with high plant density on yield components and photosynthetic characteristics of machine-transplanted late rice were studied.【Method】Under the field experiment condition, taking hybrid rice Taiyou 390 and conventional rice Xiangwanxian 13 as materials with two nitrogen and density levels. Low nitrogen rate with high density(N 120 kg/ha,363600 hole/ha)and conventiona...