Leaching effectiveness of desalinization by rainfall combined with wheat straw mulching on heavy saline soil
文献类型： 外文期刊
第一作者： Cui, Shiyou
作者： Cui, Shiyou;Zhang, Jiaojiao;Sun, Mingfa;Chen, Huatao;Feng, Zhixiang
作者机构：
关键词： Soil electrical conductivity; soil pH; sodium adsorption ratio; straw mulch; leaching curve
期刊名称：ARCHIVES OF AGRONOMY AND SOIL SCIENCE （ 影响因子：3.092； 五年影响因子：2.745 ）
ISSN： 0365-0340
年卷期： 2018 年 64 卷 7 期
页码：
收录情况： SCI
摘要： Natural desalting in saline land with shallow groundwater and high evaporation is proceeding slowly. The main objective of the study was to evaluate the efficiency of straw mulching on desalinization by rainfall in saline land. Two sites of Solonchaks with different electrical conductivity (EC1:5) were selected to compare topsoil (0-40 cm) EC1:5 dynamics between bare land and straw mulching treatment. Soil samples were taken from May 2014 to April 2015 for determination of EC and pH, initial and termination samples were also used to measure Na+, Ca2+ and Mg2+ for calculating sodium adsorption ratio. The results demonstrated that supplementing salt leaching with straw mulch significantly decreased the EC1:5 of the soil profile (0-80 cm) when compared with no mulch. The both of topsoil (0-40 cm) EC1:5 and ECa/ECi decreased exponentially with the increase of cumulative rainfall and D-w/D-s under straw mulching, respectively. 178.6 and 351.9mm of averaging rainfall were needed for removing 80% of salts in the 0-20 and 0-40 cm soil profile layers, respectively across all the cases of straw mulching and various EC1:5. These findings suggested that rainfall combined with straw mulching could be popularized as effective measures to ameliorate saline soil for agriculture and forestry utilization.
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