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[1]ZHAI Jiaying,LI Yuanze,SONG Yahui,et al.Comparative Analysis of Water Soluble Carbon and Nitrogen in Rhizosphere and Non Rhizosphere Soils of Different Slope Aspects in Loess Hilly Region[J].Research of Soil and Water Conservation,2019,26(06):32-37.

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Comparative Analysis of Water Soluble Carbon and Nitrogen in Rhizosphere and Non Rhizosphere Soils of Different Slope Aspects in Loess Hilly Region

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 26 Number of periods: 2019 06 Page number: 32-37 Column: Public date: 2019-10-17

Title:: Comparative Analysis of Water Soluble Carbon and Nitrogen in Rhizosphere and Non Rhizosphere Soils of Different Slope Aspects in Loess Hilly Region

Author(s):: ZHAI Jiaying^1,2, LI Yuanze³, SONG Yahui^1,2, QIAO Leilei⁴, XIN Qi⁴, XUE Sha^1,4; 1. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, CAS & MWR, Yangling, Shaanxi 712100, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. College of Forestry, Northwest A & F University, Yangling, Shaanxi 712100, China;
4. Institute of Soil and Water Conservation, Northwest A & F University, Yangling, Shaanxi 712100, China

Keywords:: slope direction; rhizosphere; non rhizosphere; water soluble carbon and nitrogen

CLC:: S153

DOI:: -

Abstract:: In order to study the effect of different slope directions on soil water-soluble organic matter and its rhizosphere effect, the rhizosphere soil and non-rhizosphere soil of different slope directions (sunny slope, semi-sunny slope, shady slope) in loess hilly region were selected as research samples. The water soluble ammonium nitrogen (WSNH₄⁺-N), nitrate nitrogen (WSNO₃^--N), water soluble organic nitrogen (WSON) and water dissolved organic carbon (WSOC) the content of total nitrogen (WSN) were determined, and water soluble organic matter (DOM) was analyzed by ultraviolet visible spectrum. The Results show that:(1) the water soluble carbon and nitrogen of soil were all affected by slope direction; the content of WSNH₄⁺-N reached the highest in sunny slope, while the contents of WSN, WSNO₃^--N, WSON and WSOC were the highest in semi-sunny slope, and the nutrient contents, especially the slope differentiation of WSON and WSOC, were affected by the rhizosphere effect; (2) the water-soluble nitrogen components and WSOC in rhizosphere soil were significantly higher than those in non-rhizosphere soil; the rhizosphere effects of different species were different and the rhizosphere effects were also affected by slope directions; (3) the level of DOM humification in semi-sunny slope soil was the highest, and the rhizosphere effect of plant could significantly increase the degree of soil DOM humification, and the effect of rhizosphere effect was much greater than that of slope direction.

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