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[1]WANG Yajuan,CHEN Yunming,SUN Yarong,et al.Plant Diversity and Soil Nutrients in Different Parts of Erosion Gully in Loess Hilly Region of South Ningxia[J].Research of Soil and Water Conservation,2023,30(05):99-105.[doi:10.13869/j.cnki.rswc.2023.05.010.]

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Plant Diversity and Soil Nutrients in Different Parts of Erosion Gully in Loess Hilly Region of South Ningxia

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 30 Number of periods: 2023 05 Page number: 99-105 Column: Public date: 2023-08-10

Title:: Plant Diversity and Soil Nutrients in Different Parts of Erosion Gully in Loess Hilly Region of South Ningxia

Author(s):: WANG Yajuan¹, CHEN Yunming², SUN Yarong¹, ZHAO Min¹; (1.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanx 712100, China; 2.Institute of Soil and Water Conservation, CAS & MWR, Yangling, Shaanxi 712100, China)

Keywords:: loess hilly region in south Ningnan; erosion gully; gully head; gully bed; gully bank; diversity of species; soil nutrient

CLC:: S157.1

DOI:: 10.13869/j.cnki.rswc.2023.05.010.

Abstract:: [Objective] The aims of this study are to explore the relationship between plant diversity and soil nutrients in different parts of erosion gully in the loess hilly region of south Ningxia, and to provide basis for soil and water conservation and protection of erosion gully. [Methods] The gully head, gully bed and gully bank of three stable erosion gully in Yuwa catchment, Pengyang County, Ningxia were selected as the sites. Soil samples of 0—10, 10—25, 25—40, 40—55, 55—70 cm were collected through field vegetation investigation, and the contents of soil organic carbon, soil total nitrogen and soil total phosphorus were measured indoors. Plant diversity and soil nutrient characteristics were analyzed in different parts of erosion gully(gully head, gully bed and gully bank). [Results] In gully head, the plants belong to 3 families and 6 genera, including 4 genera and 4 species of Gramineae, 1 genus and 1 species of umbelliferae and legumes. In gully bed, plants belong to 5 families and 12 genera, including 4 genera and 4 species of gramineae, 5 genera and 5 species of Compositae, 1 genus and 1 species of legumes, rubiaceae and umbelliferae respectively. In Gully bank, plants belong to 3 families and 7 genera, 4 genera and 4 species of Gramineae, 2 genera and 2 species of legumes, 1 genus and 1 species of umbelliferae. The number of plant species in each part of erosion gully is the order: gully bed>gully bank>gully head. With respect to the life type, all parts were mainly perennial herbs with one or two annual herbs. Above-ground biomass, Shannon-wiener index, Patrick index and Margalef index of erosion gully are the order: gully bed>gully bank>gully head; Simpson index shows the order: gully head>gully bed>gully bank; The Pielou index is the order: gully head>gully bank>gully bed. The average contents of soil organic matter, soil total phosphorus and soil total nitrogen in each part of erosion gully are the order: gully bed>gully bank>gully head, and mainly concentrated in 0—10 cm and 55—70 cm. The aboveground biomass was positively correlated with soil organic carbon and soil total phosphorus(p<0.05). Shannon-wiener index was negatively correlated with soil total phosphorus(p<0.05), and aboveground biomass was positively correlated with soil organic carbon(p<0.01). [Conclusion] The erosion gully head is prone to collapse and the soil nutrient condition is poor, so native tree species with developed roots, strong stems and strong scour resistance should be deployed. Herbs or shrubs with high carbon, nitrogen and phosphorus content in gully bed and gully bank should be preferentially deployed.

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Last Update: 2023-08-10