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[1]JIANG Jiayu,LIU Rentao,ZHANG Annin.Comparative Analysis of Soil Fractal Dimension and Soil Physical and Chemical Properties Between Caragana korshinskii Shrub Plantations in Arid and Semi-arid Desert Steppe[J].Research of Soil and Water Conservation,2021,28(04):54-61.

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Comparative Analysis of Soil Fractal Dimension and Soil Physical and Chemical Properties Between Caragana korshinskii Shrub Plantations in Arid and Semi-arid Desert Steppe

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 28 Number of periods: 2021 04 Page number: 54-61 Column: Public date: 2021-08-10

Title:: Comparative Analysis of Soil Fractal Dimension and Soil Physical and Chemical Properties Between Caragana korshinskii Shrub Plantations in Arid and Semi-arid Desert Steppe

Author(s):: JIANG Jiayu, LIU Rentao, ZHANG Annin; (Breeding Base for State Key Laboratory of Land Degradation and Ecological Restoration in Northwestern China, Ningxia University, Yinchuan 750021, China)

Keywords:: arid environment; Caragana korshinskii; soil physical and chemical properties; soil fractal dimension; desertified grassland

CLC:: S153;S152.3

DOI:: -

Abstract:: In order to explore the change characteristics of soil fractal dimension and physical and chemical properties of the shrub micro-habitat in the arid and semi-arid desert steppe area and its response to arid environment, Caragana korshinskii shrub in Yanchi of Ningxia and Urat of Inner Mongolia were selected as the research samples, the bare land was used as a control, field sampling and indoor analysis methods were used to carry out a comparative study of soil fractal characteristics and soil physical and chemical properties of the micro-habitats inside and outside the shrubs. The results showed that:(1)in Yanchi, the content of medium sand significantly increased, but the content of soil clay, moisture, pH value, total carbon, and carbon-to-nitrogen ratio reduced in Caragana korshinskii shrubs; in Urat, the content of very fine sand and fine sand significantly increased, but the content of soil clay and fractal dimension reduced in Caragana korshinskii shrubs;(2)with the increase of precipitation, the silt content, water content, total carbon and carbon-to-nitrogen ratio increased, while the clay content, fine sand particles, and pH value decreased in Caragana korshinskii canopy habitats;(3)there was a positive correlation between soil clay and nutrients, and between soil silt content and total carbon, carbon-to-nitrogen ratio and water content, but there was a negative correlation of content of soil very fine sand with total nitrogen, between soil fine sand content and total carbon, carbon-to-nitrogen ratio and water content, and between soil sand content and water content, total soil carbon, and carbon-to-nitrogen ratio;(4)the fractal dimension of soil had a positive correlation with soil nutrients, a significant positive correlation with clay content, and a significant negative correlation with very fine sand and fine sand content. In summary, it was concluded that the differences in precipitation distribution could lead to variations of soil water redistribution and nutrient spatial distributions between Caragana korshinskii shrub microhabitats. The soil fractal dimension could be the rational reflection of the spatial differences of soil properties between shrub microhabitats in desertified grassland under different rainfall regimes.

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Last Update: 2021-08-20