摘要
在中等肥力水平下,赣早籼52全生育期平均吸氮在158.3kg/hm2左右,产量6000kg/hm2左右,施氮量为150kg/hm2、行株距20.0cm×16.7cm时产量最高。施氮量和密度两因素在产量表现上存在极显著的互作效应。由于施氮量和密度的不同,形成了数量和质量性状各异的群体,进而影响产量和品质,该试验条件下群体叶面积指数(LAI)在孕穗期5.9d左右时最有利于产量的形成。氮肥和密度对整精米率、蛋白质含量和垩白米率等部分米质指标有一定的影响。
Results showed that under the local soil and climate,on an average,the rice variety-Ganzaoxian 52 absorbed 158.3 kg/hm^2 N fertilizer during its whole growth period with a grain yield of about 6 000 kg/hm^2.The highest yield of 6 525 kg/hm^2 was obtained with 150 kg/hm^2 N fertilizer and planting density of 20.0 cm×16.7 cm.Nitrogen fertilizer and planting density showed a significant interaction on grain yield.Owing to different amount of N fertilizer and different planting density,populations with different quantitative and qualitative characters formed.A population with optimum LAI of 5.9 at booting stage was good for high grain yield and grain quality such as the ratio of head rice,chalky rice percentage and protein content.
出处
《湖北农业科学》
北大核心
2010年第9期2061-2065,共5页
Hubei Agricultural Sciences
基金
江西省自然科学基金项目(2009GZN0097)
关键词
早稻
氮肥
密度
产量
品质
early rice
nitrogen fertilizer
density
yield
quality
