【摘要】 该文利用3 a试验资料研究了华北半湿润地区滴灌条件下,不同盐分浓度微咸水和土壤基质势对番茄耗水量、水分利用效率和土壤盐分的影响。研究发现总体上番茄整个生育期累计耗水量随着灌溉水盐分浓度的增大而降低,随着土壤基质势控制的降低而降低;而水分利用效率随着灌溉水盐分浓度的增大略微有增大的趋势,随着土壤基质势控制的降低明显升高;3 a微咸水灌溉后,整个土体0～90 cm深度土壤盐分没有明显增加。更多还原

【Abstract】 A three years experiment was carried out to investigate the effects of saline water and soil matric potential(SMP) on tomato water use,water use efficiency(WUE) and soil salinity under drip irrigation in semi-humid regions of North China.The results indicate that tomato seasonal water use dec with the increasing of electrical conductivity of saline water(ECi),and decreased with the decreasing of SMP.Water use efficiency increased a little with the increasing of ECi,and increased with the decreasing of SMP.After three-year saline water irrigation,the soil salinity in the layer of 0～90 cm did not increase obviously.更多还原