| 张莉,丁国栋,王翔宇,赵名彦,郭跃,韦立伟,梁文俊.隔沙层对盐碱地土壤水盐运动的影响[J].干旱地区农业研究,2010,28(2):197~200 |
| 隔沙层对盐碱地土壤水盐运动的影响 |
| 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 |
| 中文关键词: 盐碱地 隔沙层 水盐运动 |
| 英文关键词:saline land sand layer water and salt movement |
| 基金项目:国家科技支撑计划课题（2006BAD03A0305） |
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| 中文摘要: |
| 在80～100 cm范围土层设置沙层，对土壤电导率和含水量进行为期6个月的观察，分析隔沙层对土壤水盐运动的影响。结果表明：80～100 cm层沙层在大降雨量时能够提高土壤含水量；降雨量小，蒸发强烈的5～7月份，隔沙处理能够使土壤积盐程度较对照减少50%～70%；隔沙层延缓沙层以上土壤水分的下渗，从而提高降雨对土壤盐分的淋洗作用。当降雨量接近蒸发量的时候，隔沙处理土壤就能明显脱盐，而在此雨量下，对照只能保证土壤不发生积盐或少量积盐。雨季结束之后,隔沙处理土壤脱盐率较对照提高10%～35%，并能够使土壤脱盐过程持续到10月份，对植物生长十分有利。 |
| 英文摘要: |
| 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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