研究表明 ,水稻覆膜旱作 ,在严重干旱的情况下 ,土壤含水量能保持在田间持水量以上 ,水稻分蘖能正常进行。水稻露地旱作 (对照 ) ,在同样干旱的情况下 ,土壤含水量却低于田间持水量 ,水稻分蘖受到严重影响 The results showed that under the conditions of dry film mulching, the water content of soil could be kept above the field capacity in the case of severe drought, and the tillering of rice could be carried out normally. In the same drought condition, the soil water content in paddy field was lower than that in field, and tillering of rice was severely affected