摘要
滴灌条件下核桃需水量研究结果表明,核桃生育期内各土层的土壤含水量的变化趋势是一致的,灌水后土壤含水量均增大,但增加的幅度不相同,随着灌水时间的推移,各土层的含水量逐渐减小。核桃生育期的灌溉总量为725.28mm,需水总量为727.34mm,年日均耗水量为4.75mm。核桃生育期的平均作物系数和需水系数分别为1.14和1.04。
The water requirement of walnut trees was studied under the drip irrigation.The results showed that the variation trend of the water content in soil of per volume was concurrent in growth period of walnut tree.The water content in soil increased after irrigation,but the extent of increasement was difference after irrigation.The water content in soil was diminishing with the time putting off.Sum of amount of irrigation and amount of water requirement were 725.28 mm and 727.34 mm respectively in growth period of walnut tree.Average daily water use was 4.75 mm.Average of crop coefficients and water requirement coefficients were 1.14 and 1.04 respectively in growth period.
出处
《现代农业科技》
2010年第21期117-118,121,共3页
Modern Agricultural Science and Technology
基金
国家科技支撑项目"环塔里木盆地特色果树微喷技术研究与示范"(2007BAD38B02)和"干旱区现代农业节水技术集成与示范"(2007BAD38B09)
自治区重大专项"果树和葡萄节水灌溉技术开发与示范"(200731136-5)
关键词
核桃树
滴灌
需水量
参考作物蒸发蒸腾量
作物系数
walnut trees
drip irrigation
water requirement
evapotranspiration
crop coefficients
