水稻子粒发育动态与含水率的研究  

Research on Development Dynamics and Water Content of Rice Seeds

作　　者：马景勇[1] 邢桂玲[1] 杨福[1] 邬信康[1] 

机构地区：[1]吉林农业大学

出　　处：《吉林农业大学学报》1995年第1期20-24,共5页Journal of Jilin Agricultural University

基　　金：吉林省农业厅资助

摘　　要：本文在严格标识强、弱势花的条件下通过称重方法，研究了藤系１３８和秋光两品种同一穗上强、弱势粒的干重积累过程与子粒含水率的动态变化。结果表明，强势花在开花后迅速增重，待强势粒增重高峰下降后，弱势粒才相应出现高峰，并有阶段灌浆现象；抽穗后水稻子粒含水率动态过程可分为缓慢下降、迅速下降、平稳下降三个时期；子粒含水率与灌浆速率呈单峰偏态曲线，在子粒含水率５０％～５５％时段灌浆速率出现最大值，子粒停止灌浆的临界含水率为２０％左右。Research results showed that Vigorous fertilized spikelets of two varieties had rapid weight increase after flowering,while there was only little or even no increment of weight in weak.when the peak of grain weight of vigorous began to decline the spikelets started to gain weight rapidly.The dynamic changes of the grain water content(GWC)after thesis could be divided into slow steep and steady decrease periods. The curve of the filling rate in response to GWC was of non-normal distribution with a single climax at 50%￣55% of GWC.The filling of grain ended when the GWC was 20%. It might be true that 20% of GWC was the critical level for grain filling.

关 键 词：水稻 子粒 发育 含水率 

分 类 号：S511.101[农业科学—作物学]