【作者】 孙泽强； 康跃虎； 窦超银；

【Author】 Sun Zeqiang~(1,2),Kang Yuehu,~2 Dou Chaoyin~2 (1.Soil and Fertilizer Institute,Shandong Academy of Agricultural Sciences,Jinan 250100;2.Institute of geographical sciences and natural resources research,Chinese Academy of Sciences,Beijing 100101)

【机构】 山东省农业科学院土壤肥料研究所； 中国科学院地理科学与资源研究所；

【摘要】 利用负压计控制滴头正下方20cm土壤水分条件的田间试验方法,对地下水浅埋区重度盐碱荒地"咸水滴灌+高垄+覆膜"治理开发模式下栽植两年的枸杞土壤盐分分布进行了初步研究。发现在该模式下,随着土壤基质势控制水平的降低,滴灌水量降低。当土壤基质势控制水平较高时(-10kPa和-20kPa),土壤盐分有远离滴头的趋势,当土壤基质势控制水平较低时(-30～-50kPa),土壤盐分有向滴头靠近的趋势。在垄沟内,各处理与处理前相比土壤总合盐量都减小,减小幅度有随土壤基质势控制水平的降低而增加的趋势。在各种水分控制条件下,通过降水淋洗和排水系统,土壤剖面的盐分能维持基本的平衡。该研究结果可为盐碱地开发利用提供科学依据和技术参数。更多还原

【Abstract】 A field experiment was carried out on the effects of drip irrigation using saline water on the distribution of soil salt of lycium barbarum grown 2 years in shallow burying area of groundwater on serious degrees of saline and alkaline wasteland under the pattern of ’drip irrigation using saline water + high ridge’ when the soil matric potential at 20 cm below soil surface.The results indicated that the drip irrigation amount decreased with the decreasing of the control lever of soil matric potential.When the soil matric potential controls higher(-10kPa and -20kPa),the soil salt have the tendency to far away from the dripper.When the soil matric potential controls lower(-30 to -50kPa),the soil salt have tendency to close the dripper.In the furrow,soil total salt content reduced compared with the initial condition and the reducing range increased with the decreasing of controlling lever of soil matric potential.Under these water control conditions,soil salt of profile could be kept in basic balance through rainfall and water drainage system.The research results can product scientific basis and technological parameters.更多还原