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[1]HAN Fugui,MAN Duoqing,ZHENG Qingzhong,et al.Species Diversity of Tamarix Ramosissima Communities in Different Habitats and the Relationship Between Soil Moisture and Salinity in the Middle and Lower Reaches of Shiyang River Basin[J].Research of Soil and Water Conservation,2022,29(03):49-56.

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Species Diversity of Tamarix Ramosissima Communities in Different Habitats and the Relationship Between Soil Moisture and Salinity in the Middle and Lower Reaches of Shiyang River Basin

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 29 Number of periods: 2022 03 Page number: 49-56 Column: Public date: 2022-04-20

Title:: Species Diversity of Tamarix Ramosissima Communities in Different Habitats and the Relationship Between Soil Moisture and Salinity in the Middle and Lower Reaches of Shiyang River Basin

Author(s):: HAN Fugui^1,2, MAN Duoqing², ZHENG Qingzhong², XIAO Bin², ZHANG Yunian², FU Guiquan², DU Juan²; (1.National Observation Station on Forest Ecosystems in Hexi Corridor of Gansu, Gansu Hexi Corridor Forest Ecosystem National Research Station, Wuwei, Gansu 733000, China; 2.State Key Laboratory Breeding Base of Desertification and Aeolian Sand Disaster Combating, Gansu Desert Control Research Institute, Lanzhou 730070, China)

Keywords:: Shiyang River; different habitats; Tamarix community; species diversity; soil moisture; soil salinity

CLC:: Q948

DOI:: -

Abstract:: In order to provide a reference for the vegetation restoration and protection of Tamarix Ramosissima community in the Shiyang River Basin, the species composition, quantitative characteristics, soil moisture and salinity of four habitat-type were measured, and the relationship between the community characteristics and soil moisture were analyzed. The results show that:(1)there are 22 species of plants belonging to 9 families and 20 Genera in Tamarix community, of which 8 species(5 families and 6 Genera)belong to shrubs, 7 species(4 families and 7 Genera)belong to perennial plant, 7 species(3 families and 7 Genera)belong to annual plant, which account for 36.36%, 31.82% and 31.82% of the total species, respectively;(2)in Tamarix Chinensis community, the density of fixed saline-alkali sandy land is the highest, followed by saline-alkali land and abandoned farmland wetland, and the lowest among hills, the average density has no significant difference(p> 0.05), the coverage difference is significant(p< 0.05), the largest is fixed saline-alkali sandy land, 73.33% saline-alkali land and abandoned farmland are the next, and the same quantity is 61.67%, the abandoned farmland wetland is 47.00%;(3)the species composition and diversity of Tamarix communities in different habitats are different, and the differences are statistically significant in Margalef richness index, Shanon-Wiener Diversity Index, Simpson Diversity Index and Alatulo evenness index(p< 0.05). The dominance index of Interdune lowland community is lower than that of saline-alkali land, fixed saline-alkali sand land and abandoned farmland wetland, and the community structure is relatively stable, and the Pielou evenness index of Interdune lowland is significantly higher than that of other three types;(4)in the soil layers of 0—10 cm, 10—20 cm, 20—30 cm, 30—40 cm, 40—60 cm, 60—80 cm, the soil moisture contents of saline-alkali sandy land and fixed saline-alkali sandy land are the highest, followed by wetland and inter-dune lowland. There is a positive correlation between species diversity and soil moisture, but no significant difference is found(p< 0.05). The species of Tamarix ramosissima community in different habitats are rare, the structure is simple, and the average density of species is not significant. The shrub species are the most common species in the community, and the perennial and annual plant species are the same. The diversity index of Interdune lowland was higher than that of other habitat types, and the lowest is returned farmland, while the index of ecological dominance is the opposite.

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Last Update: 2022-04-20