摘要
研究了不同施氮量与栽植密度对常优1号产量及群体生长特性的影响。结果表明:施氮量270 kg/hm^2和栽植密度5.0×10~5/hm^2的处理产量最高。施氮量与栽植密度对产量构成因素的影响,以有效穗数、每穗粒数影响较大,达极显著水平,对千粒重影响较小,为显著水平,对结实率影响不显著;施氮量与栽植密度对茎蘖数、叶面积指数以及干物质生产与积累等群体生长特性的影响与产量的变化一致。
The three-way hybrid keng rice Changyou 1 was used as a test material,and the effects of nitrogen application amount and planting density on the rice yield and growth characteristics were studied. The results showed that the effects varied with nitrogen application amount and planting density. The nitrogen application amount of 270 kg/hm2 and planting density of 500 000 seedlings/hm2 could gain the highest yield. The effects of both nitrogen application amount and planting density were very significant on the number of effective panicles and grains per spike,significant on the 1 000-grain weight, and not significant on the seed setting rate. The effects of both nitrogen application amount and planting density on the growth characteristics of rice population such as tiller number, LAI, and production and accumulation of dry matter were basically the same as those on the rice yield in change trend. It was preliminarily concluded that the appropriate nitrogen application amount and planting density for high yield culture of the cultivar Changyou 1 transplanted by machine were respectively 210-330 kg/hm2 and 500 000 seedlings/hm2 ,and the best nitrogen application amount was not more than 270 kg/hm2.
出处
《上海农业学报》
CSCD
北大核心
2009年第4期114-118,共5页
Acta Agriculturae Shanghai
基金
国家科技部支撑计划(2007BAD89B12)
苏州市农业重大招标项目(ZN0504)资助
关键词
杂交粳稻
常优1号
施氮量
栽培密度
水稻产量
生长特性
高产栽培
Hybrid keng rice
Changyou 1
Nitrogen application amount
Planting density
Rice yield
Growth characteristics
High yield culture
