膜下滴灌土壤湿润区水热耦合对棉花生长的影响

为了探明膜下滴灌土壤湿润区对土壤温度及棉花生长的影响,试验中通过不同滴水流量的设置（＂1倍滴流量＂、＂2倍滴流量＂和＂4倍滴流量＂）获得了不同的土壤湿润区范围和膜下土壤含水率分布;测定了棉花生育期土壤水分和温度以及棉花生长指标和产量。结果表明,在覆膜保温作用下,膜下滴灌土壤湿润区扩大和土壤含水率的增加对膜下土壤温度没有...

Effect of Moisture and Heat Coupling in Soil Wetting Pattern on the Cotton Growth under Mulched Drip Irrigation

Based on the different soil wetting patterns and soil moisture distribution resulting from different drip discharges designed with "1 time drip discharge","2 time drip discharge",and "4 time drip discharge",the soil water content and temperature were determined as well as the cotton growth and yield to research the effects of soil wetting pattern on the soil temperature and cotton growth under the mulched drip irrigation.The results indicated that with plastic film covering,the soil temperature wasn't influenced obviously by the enhanced soil wetting pattern and soil water content,but by the cotton leaves blocking sunshine;the growth of cotton stem was impacted by the soil moisture rather than the soil temperature;the widened soil wetting pattern resulted in the soil moisture distributing more uniformly that the number bolls and theoretical yield of the cotton were increased significantly.These efforts are helpful to the design of soil wetting pattern for the mulched drip irrigation technique.