膜下滴灌条件下棉花花铃期冠层内的温光特征分析

Analyzes of Temperature and Light Characteristics for Drip Irrigation under Plastic Film Cotton Canopy at Blossoming and Boll-forming Stages

设计棉花膜下滴灌与普通沟灌2种灌溉方式,在棉花花铃期对冠层内的温度、光照强度、净辐射和消光系数等进行了同步观测。结果表明,在两种灌溉方式下棉花冠层内的温度、光照强度和净辐射日变化曲线均呈单峰线;花铃期初期和后期膜下滴灌棉花冠层温度、净辐射大于常规灌溉,而光照强度和消光系数均小于常规灌溉。

Compare with two irrigation ways of drip irrigation under plastic film and common cotton, synchronize observe the temperature,irradiation intensity,and extinction coefficient synchronously. The result showed that the diurnal variation of temperature, irradiation intensity, net radiation as a curve in cotton canopy of two irrigation ways. The temperature and Net radiation of drip irrigation under plastic film in initial stages and later stage at blossoming and boll-forming stages is bigger, irradiation intensity and Net Radiation is less than common irrigation.