控制水稻无效分蘖的水分管理技术

在决定水稻成穗的分蘖关键时期，江南地区连作早、晚稻多通过晒田以控制无效分蘖。此时由于常遇阴雨连绵天气并且早、晚稻生育期短，稻田失晒率高达７０％～８０％。充分利用降水和拦蓄雨水进行深水控蘖９～１１天，或者利用暗管排水进行晒田控蘖，可使水稻产生较好的生理效应，无效分蘖显著减少，成穗率明显提高，且能达到节水增产的目的。

Moisture Management Technique for Controlling the Non-Effective Tillering of Rice

The field sun -drying technique is used for controlling the non -effectivc tillering of rice in the key stage of tillering for determining rice tillering in south part of China Unfortunately, it is always the rainy season at the tillering stage of every year and,hc growing periods of early and later rice arc very short Therefore, the ratio of field sun-drying failure of rice is reached to 70%-80%. The better physiological effect of rice can be produced by the 9-11 days deep water tillering control of using rain water or the field drying tillering control of using underground drains. The non-effective tillering can be deercased and the spike ratio can be enhanced obviously and the purpose of water saving and yield increase can be reached.