模拟降雨条件下保水剂对沙质土壤水分的影响  

Effects of water retention agent on the moisture content of sandy soil under rainfall simulation

作　　者：王猛[1] 雷虹娟 高永[1] 汪季[1] 肖芳[1] 张文[1] 

机构地区：[1]内蒙古农业大学生态环境学院,呼和浩特010018 [2]包头市达茂旗林业局,内蒙古包头014500

出　　处：《中国水土保持科学》2015年第1期96-100,共5页Science of Soil and Water Conservation

基　　金：国家林业公益性行业科研专项"中国沙地补充考察与沙地志编研"(201304325)

摘　　要：为了探究保水剂对沙质土壤水分的影响,采用室内重建土柱,在人工模拟降雨条件下研究不同用量保水剂对沙质土壤（0-30 cm）含水率的影响。结果表明：土壤含水率随着保水剂用量的增加而增加,保水剂用量为0.2%时不但省时省力,而且0-10 cm、10-20 cm、20-30 cm 3个土层土壤含水率分别为45.42%、48.48%、46.16%,既能满足植物的生长需要,又能节省经济成本,可为干旱、半干旱区节水造林及保水剂的合理使用提供理论依据。In order to explore the effect of water retention agent on the moisture content of sandy soil,the reconstruction of laboratory soil column and artificial rainfall simulation test method were applied. The distribution of soil moisture content within 0- 30 cm depth of soil mixed with different dosages of water retention agent was analyzed. The result showed that with the increasing dosage of moisture retaining agent,the soil moisture content rose apparently. When the dosage of water retention agent was 0. 2%,it was time-saving and efficient,and the soil moisture contents of three layers（0- 10 cm,10- 20 cm,20-30 cm） were 45. 42%,48. 48%,and 46. 16%,respectively,which not only met the needs for growth of plants,but was also cost-saving. Our results are helpful for the rational use of water-saving afforestation and water retention agent,and provide a theoretical basis for arid and semiarid areas as well.

关 键 词：模拟降雨 保水剂 风沙土 土壤含水率 

分 类 号：S152.7[农业科学—土壤学]