早稻能抢时早播、早栽、早发棵,产量丰收有望。但是,有些年份往往早栽不早发,稻苗僵直,新根不长老根黑,生长停滞不分蘖,甚至萎缩死亡,这是什么原因呢?出现上述现象,群众称为“僵稻”。一般讲,除磷肥不足,病虫危害,耕作及栽插技术欠佳外,气温影响特别重要。据试验,稻的发根力受温度的影响很大。当气温达到31℃时,发根数最多,超过38℃发根力则减退,低于12℃发根停 Early rice can grab early sowing, early planting, as early as tree, crop yield is expected. However, in some years, it is often the case that early seedlings are not planted earlier, the rice seedlings are stiff, the roots are not old and black, the growth is stagnant, tilts or even dies. What is the reason? In general, the impact of temperature is particularly important except for the lack of phosphate fertilizer, pest and disease hazards, poor cultivation and planting techniques. According to the test, rice hair root strength greatly affected by temperature. When the temperature reached 31 ℃, the largest number of hair roots, more than 38 ℃ hair root power decreased, less than 12 ℃ hair root stop