【摘要】 春小麦喷灌的田间观测表明 ,在灌浆初期 ,春小麦冠层的截留水量可达 2 5 %～ 30 % ,冠层截留水量可使冠层下方的均匀系数比冠层上方提高 10 .1%～ 12 .7% .喷灌的水分飘移蒸发损失可达总水量的 2 0 %～ 2 5 % .春小麦喷灌可以降低空气和土壤温度 ,增加空气实际水汽压和相对湿度 ,这对抑制作物蒸腾将起一定作用 .更多还原

【Abstract】 Measurements of sprinkler irrigation on spring wheat field indicated that spring wheat canopy could intercept water by 25～30%, and compared with that above canopy in first milking period, the uniformity coefficient below canopy could be increased by 7～9%. Floating and evaporation loss of sprinkler irrigation water could reach 20～25% of the total. In addition, sprinkler irrigation on spring wheat field could decrease air and soil temperature, and increase air actual vapor pressure and relative humidity, which played a definite role in restraining crop transpiration.更多还原