山东省临沂市楸树人工林立地类型划分与质量评价OA北大核心CSTPCD

The categorization of site types and the assessment of site quality are instrumental in enhancing the efficacy and productivity of plantation cultivation.Using typical sampling methods,63 standard plots of Catalpa bungei plantations were set up in Linyi,Shandong Province,and the site factors,growth factors and soil factors in the standard plots were investigated,the influence of site factors on the growth of the plantations was analyzed by principal component analysis and cluster analysis,and the site type division and site quality evaluation of the C.bungei plantations were carried out.The results showed 1)the most suit-able guide curve was the power function curve,and the x2 test proved that the prepared ground index table was qualified.2)Among the site factors affecting the growth of C.bungei plantations,the importance order was soil texture＞slope direction＞slope position＞slope＞soil thickness＞elevation,among which soil tex-ture,aspect and slope were the leading factors affecting the C.bungei plantation in Linyi.3)The C.bungei plantation forest in Linyi was divided into 13 site types and 3 status levels based on the three dominant site factors of soil texture,aspect direction and slope location.Under the existing conditions of C.bungei plan-tations,the most suitable site characteristics for the growth of C.bungei plantations were as follows:dis-tributed in the down slope of sunny slope or semi-shady slope,and the soil texture was medium loam,ac-counting for 13.64％of the total standard land quantity.On the whole,the site quality of C.bungei planta-tion in Linyi needs to be improved.It is recommended to plant medium-and large-diameter C.bungei trees at the Ⅰ and Ⅱ status levels,and plant small-diameter Catalpa trees at the Ⅲ status level.