摘要
以库布齐沙漠北缘七星湖景区所铺设6种沙障的沙丘土壤为研究对象,通过野外取样,测定6种沙障(平铺式沙柳沙障、芦苇沙障、玉米秆沙障、葵花秆沙障、低立式沙柳沙障、高立式尼龙网沙障)和裸沙丘不同坡位、不同深度的土壤含水率。结果表明:6种沙障和裸沙丘在垂直方向上土壤含水率的变化趋势一致;从铺设方式和沙障材料的角度分析沙障对土壤水分的保持效果,平铺式沙柳沙障较低立式效果好;平铺式芦苇沙障和葵花秆沙障较沙柳沙障、玉米秆沙障效果好。在迎风坡,平铺式芦苇沙障土壤含水率最大,其值为3.52%;在坡顶和背风坡处,平铺式葵花秆沙障的土壤含水率最大,其值分别为1.28%和2.31%。综合分析认为,从保持沙丘水分这一角度出发,建议在沙丘的迎风坡铺设平铺式芦苇沙障,而在坡顶和背风坡,则应优先考虑铺设平铺式葵花秆沙障。
Taking six kinds of sand barriers in seven-star lake holiday which locates in the north of Kubuqi desert as the object of study.This article measured soil moisture content in different slope positions and different depth of six kinds of sandy dunes and bare sandy dunes by the method of field sampling.The results showed that the soil moisture content of six sandy dunes and bare sandy dunes had the same changing trend in vertical direction,namely,increased with sampling depth.Anglicizing the maintaining effect on soil moisture from the perspective of laying mode and sandy dunes materials,flat Salix psammophila sandy dunes had better effect than low vertical;flat reed sandy dunes and sunflower stem sandy dunes had better effect than Salix psammophila sandy dunes and Yumigan sandy dunes.In the windward slopes,the soil moisture content of flat reed reached the maximum,the content was 3.52%;In the top of slopes and leeward slopes,the soil moisture content of flat sunflower stem sandy dunes reached the maximum,the content were 1.28% and 2.31% respectively.Through comprehensive analysis,it suggested that in the windward of sandy dunes should lay flat reed sandy dunes;however,in the top of slopes and leeward slopes,it should give priority to lay sunflower stem sandy dunes.
出处
《北方园艺》
CAS
北大核心
2011年第24期182-185,共4页
Northern Horticulture
基金
国家自然科学基金资助项目(40961036
30972420)
关键词
库布齐沙漠
沙障
土壤含水率
Kubuqi desert
sand barriers
soil moisture content
