Analysis on Soil Physical and Chemical Properties of Different Habitats in the Middle Reaches of the Tarim River

doi:10.13466/j.cnki.lyzygl.2015.01.017

Abstract

Abstract: The desert riparian vegetation in the middle of Tarim River was selected as the research object.The characteristics and correlation of soil physical and chemical properties in different habitats were studied by using field sampling investigation and laboratory test analysis method and the main factors of soil physical and chemical properties in the succession of habitat degradation discussed.The results showed that(1)Along with the farther distance from the banks,average unit weight and moisture content decreased.The soil physical properties obviously improved in the habitatⅡ,water-holding performance improved significantly.The soil moisture storage capacity was reduced in habitat Ⅲ.(2)The overall soil PH value was alkaline in different habitats,the soil soluble in each profile had obvious properties of surface-aggregation.The total amount of salt and organic matter in habitat Ⅱ was significantly higher than those of other habitats.As the underground water level was reduced,total phosphorus,total potassium content increased.(3)The correlation analysis showed water content had relatively close relationship with other indicators,and the correlation of bulk density and total phosphorus was the largest.The PH value had a obvious negative correlation with alkali solution nitrogen and available potassium(P＜0.05).(4)The principal component analysis showed that the cumulative contribution which included the factor of the soil structure and total potassium and the factor of available nutrient was 100.00.So these indicators served as the basis of characteristics of the habitat degradation evaluation principal component analysis.It would provide theoretical basis for desertification ecosystem restoration and oasis ecological protection of the middle reaches of the Tarim River and even for the northwest China.

Key words: desert riparian vegetation, desertification, soil physical and chemical properties

CLC Number:

S714.2

WANG Xianan, ZHOU Zhengli, WANG Liang, LIANG Jiye, LU Ruiheng. Analysis on Soil Physical and Chemical Properties of Different Habitats in the Middle Reaches of the Tarim River[J]. FOREST RESOURCES WANAGEMENT, 2015, (1): 95-100.

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