摘要
以中浙优1号和甬优9号为试验材料,在免耕机插条件下比较三种种植密度（20.83万/hm2、18.52万/hm2和15.87万/hm2）对水稻生长及产量形成的影响。结果表明,在行距30cm固定,株距16~21cm范围内,通过缩小株距增加机插密度,可增产免耕机插水稻产量,增产幅度在中浙优1号在22.5%~27.3%,甬优9号在1.8%~18.4%;种植密度增加,也有利于增加高峰苗和有效穗数,提高成穗率和群体叶面积指数,基部透光率下降,从而提高光能利用,促进高产群体形成和后期干物质积累。
Taking Zhongzheyou1 and Yongyou9 for example, the effect of different densities on growth and grain yield of rice were studied under no-tillage machined transplanting. The row space（ 30cm） was fixed, but the hill space can be changed in 16 ~21cm, the grain yield rate of Zhongzheyou1 and Yongyou9 increased about 22.5% ~27.3% and 1.8% ~18.4% respectivelywhen the hill space reduced and planting density increased. The higher planting density is conducive to the increase of the max tiller number, panicle number, and leaf area index, which reduce the light transmittance, improve solar utilization and total biomass.
出处
《中国农机化学报》
北大核心
2014年第5期9-12,共4页
Journal of Chinese Agricultural Mechanization
基金
国家科技支撑计划项目(2012BAD07B02)
科技部科研院所技术开发研究专项(2013EG134237)
浙江三农六方科技协作计划项目(SN201206)
关键词
水稻
免耕
机插
种植密度
产量
rice
no-tillage
machined transplanting
density
yield
