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[1]ZHAO Jing,LIU Meiying,HAO Mengjie,et al.Effects of Vegetation Restoration on Soil Aggregate Composition and Organic Carbon of Eco-Photovoltaic Power Station in Arid Area[J].Research of Soil and Water Conservation,2022,29(05):137-143.

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Effects of Vegetation Restoration on Soil Aggregate Composition and Organic Carbon of Eco-Photovoltaic Power Station in Arid Area

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 29 Number of periods: 2022 05 Page number: 137-143 Column: Public date: 2022-08-20

Title:: Effects of Vegetation Restoration on Soil Aggregate Composition and Organic Carbon of Eco-Photovoltaic Power Station in Arid Area

Author(s):: ZHAO Jing, LIU Meiying, HAO Mengjie, WANG Qingyu; (Inner Mongolia Key Laboratory of Soil Quality and Nutrient Resource, College of Grassland, Resources and Environment, Inner Mongolia Agricultural University, Hohhot 010018, China)

Keywords:: photovoltaic power station; vegetation restoration; stability of soil aggregates; soil organic carbon

CLC:: S153

DOI:: -

Abstract:: In photovoltaic power station ecological demonstration area, three types of typical artificial vegetation, Pinus sylvestris L, stragalus membranaceus and Medicago sativa L. were selected as the research objects, and the land without vegetation restoration was taken as the control to explore the particle size of aggregate distribution characteristics, the stability level and the changes of organic carbon of 0—40 cm soil layer under different vegetation restoration measures, and to provide a theoretical basis for the vegetation restoration, soil structure stability and organic carbon sequestration of ecological photovoltaic power stations in arid areas. The results showed that: compared with the control, the content of water-stable large aggregates(>0.25 mm)increased in Pinus sylvestris L., stragalus membranaceus and Medicago sativa L., while the content of micro-aggregates(<0.25 mm)decreased, especially the content of large aggregates was the highest in Pinussylvestris var. mongolica; the water stability of aggregate MWD(mean weight diameter)and GMD(geometric mean diameter)of the three plants were significantly higher than those of the control, while the D values were significantly lower than that of the control; in the whole soil profile, the soil aggregate stability index was the best in Pinussylvestris var. mongolica, which indicated that the improvement effect of soil structure in the Pinus sylvestris L. was obvious and the stability of soil aggregates was higher; the organic carbon content and organic carbon contribution rate of Pinus sylvestris L., stragalus membranaceus and Medicago sativa L. increased, after the change of land use pattern, and Pinus sylvestris L. land was the most prominent one; moreover, the organic carbon content increments of the three plantlets were mainly due to the contribution of 0.25～0.053 mm particle size aggregate. These results showed that soil aggregates in Pinus sylvestris L. land were more stable than those in stragalus membranaceus and Medicago sativa L. lands, which was more beneficial to increase the organic carbon accumulation.

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Last Update: 2022-08-20