摘要
以不同穗型水稻品种为试材,研究了不同氮素水平对参试品种产量及产量构成因素的影响。结果表明,株型尤其是穗型与需氮量有一定相关。在本试验条件下,不同穗型品种干物质生产均呈“S”型曲线,抽穗前两种穗型品种干物质生产量差异不大,灌浆结实期直立穗型干物质生产量明显高于弯曲穗型品种。提高直立穗型品种经济产量的可行途径是在保持较高群体光合生产率的前提下,促进后期干物质向子粒的转移。
Effect of nitrogen level on yield of rice grain and yield components were studied using 4 rice varieties with different panicle types. The results showed that plant types, especially panicle types were surely related to the need for nitrogen. In this experiment, dry matter production of all varieties showed the curve of ＂s＂ model. Before heading stage, there was no significant difference in dry matter production of two different panicle type varieties. In the milk stage, dry matter production of varieties with erect panicle was obvious higher than that of varieties with curve panicle. Rice varieties with erect panicle enhanced economic yield effectively by improving dry matter transport to grains in late period of the season, on the premise of keeping a higher CGR.
出处
《吉林农业科学》
CSCD
2005年第4期37-40,共4页
Journal of Jilin Agricultural Sciences
基金
吉林省科技厅应用基础研究项目(2000-05-59)部分研究内容
关键词
水稻
穗型
氮素水平
产量
Rice
Type of panicle
Nitrogen level
Yield
