Comprehensive Evaluation of Suitable Land and Tree Varieties of Acacia melanoxylon Family
[Objective]To select suitable Acacia melanoxylon lines in southern mountains and to reveal the relationship between the spatial variation pattern of soil nutrients and topographic changes in Acacia melanoxylon growth.[Method]In this paper,based on seven 15-year-old Acacia melanoxylon lines(M1～M7)created on cedar logging sites,classical statistics,descriptive statistics,geostatistical methods and GIS technology were used to study the variation patterns of soil physical and chemical properties and spatial distribution of soil nutrients of seven Acacia melanoxylon lines at different slope positions.The sev-en Acacia melanoxylon lines were evaluated and selected by factor analysis and fuzzy evaluation method.[Result]The physical and chemical properties of the seven Acacia melanoxylon lineages in the lower slope were the largest,followed by middle slope and upper slope,and those in the lower slope was signi-ficantly higher than those in the other slopes;the soil structure and nutrient contents in the M7 stands in were the best,followed by M6 and M5;the nutrient contents in the study area were generally distributed in blocks or strips,showing an increasing trend from northeast and northwest to south.[Conclusion]The comprehensive evaluation value is the highest in the upper and lower slope of Acacia melanoxylon family M7,and its growth has the best effect on the improvement of soil physical and chemical properties,and in the middle slope of Acacia melanoxylon family M6.The results of the study are of reference value for the study of land-appropriate species and sustainable development in southern mountainous areas,and can be used in the management practice of Acacia melanoxylon plantations.
万方数据
维普
