摘要
利用田间试验研究了不同喷灌均匀系数条件下的冬小麦耗水规律及喷灌蒸发漂移损失。试验设置低、中、高喷灌均匀系数处理 ,喷灌均匀系数的变化范围为 6 2 %～ 82 %。试验结果表明 ,在北京地区冬小麦生育期内 ,喷洒水利用系数的变化范围为 0 .6 4～ 0 .86 ,利用系数随喷灌均匀系数的增大而增大 ,随风速的增大而降低。低均匀系数处理的冬小麦耗水量高于高均匀系数处理。试验结果还表明 ,在所研究的喷灌均匀系数范围内 ,均匀系数对产量的影响不明显。
Field experiments were conducted to observe winter wheat response to nonuniform sprinkler irrigation under various Christiansen uniformity coefficient (CU) levels ranging from 62% to 82%. Evaporation and drift losses were estimated during the whole irrigation season of winter wheat based on catch can data. The results demonstrated that sprinkler efficiency, defined in this article, varied in a range of 0.64～0.86, increasing with sprinkler uniformity but decreasing with wind speed. For the same yield level the amount of water consumed by winter wheat in the growing season was greater for low sprinkler uniformity than for high uniformity since low uniformity produced a reduced sprinkler efficiency. Experimental results also indicated that sprinkler uniformity had little effect on crop yield for the studied range of CU.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2001年第1期58-63,共6页
Transactions of the Chinese Society of Agricultural Engineering
基金
Project is supported by the National NaturalScience F oundation of China (5 97790 2 5 ) and NKBRSF ProjectG19990 4340 6
关键词
喷灌
均匀系数
喷洒水利用系数
冬小麦
作物需水量
产量
sprinkler irrigation
uniformity
efficiency
winter wheat
crop water requirements
yield
