| Effect of sand layer on soil water and salt movement in saline land |
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| DOI：10.7606/j.issn.1000-7601.2010.02.41 |
| Key Words: saline land sand layer water and salt movement |
| Author Name | Affiliation | | ZHANG Li | Beijing Forestry University, Key Laboratory of Soil and Water Conservation and Desertification Combating, Ministry of Education, Beijing 100083, China | | DING Guodong | Beijing Forestry University, Key Laboratory of Soil and Water Conservation and Desertification Combating, Ministry of Education, Beijing 100083, China | | WANG Xiangyu | Beijing Forestry University, Key Laboratory of Soil and Water Conservation and Desertification Combating, Ministry of Education, Beijing 100083, China | | ZHAO Mingyan | Beijing Forestry University, Key Laboratory of Soil and Water Conservation and Desertification Combating, Ministry of Education, Beijing 100083, China | | GUO Yue | Beijing Forestry University, Key Laboratory of Soil and Water Conservation and Desertification Combating, Ministry of Education, Beijing 100083, China | | WEI Li wei | Beijing Forestry University, Key Laboratory of Soil and Water Conservation and Desertification Combating, Ministry of Education, Beijing 100083, China | | LIANG Wenjun | Beijing Forestry University, Key Laboratory of Soil and Water Conservation and Desertification Combating, Ministry of Education, Beijing 100083, China |
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| Abstract: |
| The effect of sand layer on soil water and salt movement was analyzed based on a 6-month observation about soil conductivity and liquid water content in the experiment that laid sand in 80～100 cm soil profile. The result showed that sand layer in 80～100 cm could increase the soil liquid water content while rainfall is heavy enough; When in May to July that had great amount of evaporation and small amount of rainfall, with sand layer, the degree of soil salt accumulation could decrease by 50%～70% compared with the control; Sand layer could prolong the process of infiltration under sand layer，then strengthened the eluviation effect of rainfall. Soil salt content decreased significantly in sand-layered soil when rainfall was near to evaporation, and it didn't increase or increase a litter in the control. When rainy season ended, soil desalinization ratio increased by 10％～35% compared with the control, and the process of soil desalting could continue to October, which is very beneficial for the growing of plants. |
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