摘要
通过对川西北高寒草地不同类型的沙化样地0—10cm，10～20cm和20～30cm土壤有机质、pH和含水量进行分析。结果表明：（1）随着沙化程度加重，土壤有机质含量和土壤含水量明显降低；（2）随着土层深度增加，土壤有机质含量降低；未沙化、轻度沙化样地的土壤含水量随土层深度增加而降低，重度沙化样地则相反；（3）中度和重度沙化样地土壤pH约7．0，未沙化和轻度沙化pH值在6．5左右；沙地土壤有机质与pH值呈显著负相关关系，沙化土壤有机碳与水分损失是一个正反馈。鉴于川西高寒草地特殊环境，探讨了选用适宜的多年生高原药用植物或者其他高价值资源植物作为固沙材料，将治沙与经济发展相结合，建立高寒沙化草地治理模式。
This paper analyzed the soil organic matter, pH value and soil water content of various desertification plots of alpine grassland in Northwest Sichuan, at the depth of 0 - 10cm, 10 - 20cm and 20 - 30cm. The results showed as below, （ 1 ） soil organic matter content and soil water content decreased obviously with the aggravated desertification degree; （2） soil organic matter content was lower with the increase of soil depth, soil water content of the plots without desertification and with slight desertification decreased with increasing soil depth, severe desertification plots were just the opposite; （3） the pH value of moderate and severe desertification plots were about 7.0, and other plots were about 6. 5, there was a significant negative correlation between organic matter and pH value of sandy soil, and organic carbon had a positive feedback with water loss. In view of the special ecological environment of alpine grassland in Northwest Sichuan, this paper discussed the selection of appropriate perennial medicinal plants in plateau or other high value resources perennial as sand-fixation materials. Combined with economic development, this paper established the treatment model of alpine desertification grassland.
出处
《四川环境》
2013年第6期11-15,共5页
Sichuan Environment
基金
四川省科技支撑项目
四川省公益性科研院所基本科研业务专项资金(2012SZ0218)
关键词
沙化
土壤有机质
土壤含水量
固沙材料
治理模式
Desertification
soil organic matter
soil moisture
sand stabilization material
governance model
