摘要
纵穿古尔班通古特沙漠中部对风沙土理化性状分析结果表明:沙漠腹地风沙土含水量低于边部。风沙土颗粒物主要由极细沙-细沙-中沙组成,并且北部较中部和南部粗。个体沙垄垄间地风沙土φ1值最高,垄顶的平均粒径最大。北部风沙土分选性差,绝大多数为极正偏分布,峰态很窄。中部、南部风沙土分选性中等和较好,呈窄峰态和近对称的分布形式。沙漠腹地风沙土全盐含量均较低,pH值适中,二者和沙垄固定程度成一定的正相关。风沙土中有机质、N、P、K等营养物质含量较低。相比之下北部风沙土全K和有机质含量高于中、南部,而植被茂盛的垄间地和垄坡有机质和全N含量一般高于固定、半固定垄顶。局地气象条件、微地形地貌以及植被状况的差异是引起沙漠风沙土上述理化性状空间分异的重要因素。
The results of the investigation and the analyses of physical - chemical properties for aeolian sand soils across Gurbantunggut Desert show that the aeolian soils mainly consist of extremely fine sand, fine sand and medium sand, and the soil textures of the northern desert is coarser than that of the middle and southern desert. The values of φ1 of the interdunes and the mean grain sizes of the dune - tops are respectively the highest in the different parts of those individual sa nd dunes. The sorting of the aeolian sand soils in the northern desert is poorer , and the skewness is extremely positive and the kurtosis is very leptokurtic. The sorting of the aeolian sand soil in the middle and southern desert is medium and better and the skewness is near symmetrical and the kurtosis is leptokurt ic. The salt contents of the aeolian sand soils within the desert are all lower and the values of pH are medium. The salt contents and pH of the aeolian sand so ils, whose sand surfaces are more stable, are higher. The contents of organic ma tter, total N and P of aeolian sand soils are all poorer, and the contents of total K mostly belong to med ium lever. The contents of total K and organic matter for aeolian sand soils in the northern desert are higher than that in the middle and southern desert. The contents of organic matter, total N and P in the interdunes and dune - slopes, whe re the vegetation are well developed, are generally higher than that of the stab le and semi - stable dune - tops. With the differences of the local climates, bandfo rms （ including microlandform） and vegetations, the physical - chemical properties of the aeolian sand soils above - mentioned represent the special heterogeneity.
出处
《干旱区地理》
CSCD
北大核心
2006年第6期784-789,共6页
Arid Land Geography
基金
新疆维吾尔自治区发改委与阜康林业局项目(0652141)
所长基金特别支持项目(0672091)
关键词
风沙土
理化性状
分异
古尔班通古特沙漠
Aeolian sand soil
physical- chemical properties
nor th- south heterogeneity
Gurbantunggut Desert
