摘要
试验结果表明:水稻从分蘖至抽穗期遇上干旱,对产量都有不同程度的影响。其中分蘖期干旱减产最大,孕穗期和抽穗期次之。干旱主要使植株生育不良,导致亩穗数、穗粒数、千粒重减少,空秕率增多而减产。干旱时间越长,减产幅度越大。
The experimental results showed that the yield of rice could be effected by drought from tillering to heading stage in varying degrees. The margin of drop in production of rice dried in tillering stage is bigger than in booting and heading stage. Reduction of rice output is because of the bad growth of rice plant suffered drought and then caused decrease of panicle number per mu, kernel per panicle, and weight per 1000 ker-nel and increased the rate of shrunken and sterile grain.The longer the drought stage, the wider the range of yield decrease is.
出处
《贵州农业科学》
CAS
1990年第5期37-41,共5页
Guizhou Agricultural Sciences
关键词
水稻
生育
产量
干旱
drought
growth and development of rice
yield
