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[1]CHEN Xinyu,TAN Wei,YANG Shenjun.Coupling Relationship Between the Structure and Water Conservation Function of Different Mixed Forests of Pinus massoniana[J].Research of Soil and Water Conservation,2023,30(05):217-222.[doi:10.13869/j.cnki.rswc.2023.05.044.]

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Coupling Relationship Between the Structure and Water Conservation Function of Different Mixed Forests of Pinus massoniana

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 30 Number of periods: 2023 05 Page number: 217-222 Column: Public date: 2023-08-10

Title:: Coupling Relationship Between the Structure and Water Conservation Function of Different Mixed Forests of Pinus massoniana

Author(s):: CHEN Xinyu¹, TAN Wei², YANG Shenjun¹; (1.College of Forestry, Guizhou University, Guiyang, Guizhou 550025, China; 2.Research Center of Forestry Information Engineering, Guizhou University, Guiyang, Guizhou 550025, China)

Keywords:: Masson pine mixed forest; stand structure; water conservation function; model coupling; comprehensive evaluation

CLC:: S718.5

DOI:: 10.13869/j.cnki.rswc.2023.05.044.

Abstract:: [Objective] The coupling relationship between stand structure and water connotation function of Pinus massoniana mixed forests was examined in order to figure out the reasonable types of P. massoniana mixed forests, mixing ratio and stand structure, and provide the theoretical basis for sustainable development of mixed forests and improving water conservation capacity of forests. [Methods] The site factors and stand factors of 15 typical masson's pine-broadleaf mixed forests, masson's pine-Chinese fir mixed forest and Masson's pine pure forest(control)were investigated in Deshun Township, Liping County, Guizhou Province. According to the obtained survey data, principal component analysis was used to analyze 9 kinds of forest structure factors, including average DBH, average tree height, maximum water holding capacity of litter and existing litter, and coupling analysis between the principal component factors with dimensionality reduction and water conservation function was carried out. According to the coupling relationship model of forest structure and function, the water conservation function of mixed forest was evaluated. [Results] There were no significant differences in soil thickness, shrub cover, soil porosity and soil water holding capacity among different forest types(p>0.05), but there were significant differences in the existing litter stock, average maximum litter holding capacity, average maximum litter holding capacity and thickness of litter in the sample plots(p<0.05). The coupling linear model of stand structure and water conservation function was established, in which the main indexes affecting the functional of water conservation were stand structure indexes such as average DBH, average tree height, stand density index, tree species composition, and water conservation function indexes such existed litter stock, maximum litter water holding capacity and maximum litter water holding rate. The weighted ratio of the maximum water holding capacity of litter was 14.4%. The water conservation function evaluation values of the investigated stands decreased in the oder: P. massoniana×Schima superba>P. massoniana×Castanopsis cuspidata>P. massoniana×Cunninghamia lanceolata>P. massoniana pure forest. [Conclusion] The water connotation function of masson pine broadleaf mixed forest was better than those of Masson's pine coniferous mixed forest and pure forest, and the P. massoniana×S. superba mixed forest with 750 plants/hm², canopy density of 0.7 and mixing ratio of 1:2 or 2:1 was the best stand structure for water conservation function in the investigated area in Liping County, Guizhou Province.

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Last Update: 2023-08-10