崇阳县毛竹立地分类
2016-12-02赖玉玲殷陆华陈赐辉刘振兴陈亚刚罗梓珊张卓文
赖玉玲 殷陆华 陈赐辉 刘振兴 陈亚刚 罗梓珊 张卓文



摘要:以崇阳县较大面积集中连片的毛竹林分为研究对象,对42个标准地数据进行了统计分析。以坡向(x1)、坡位(x2)、坡度(x3)、腐殖质层厚度(x4)、土层厚度(x5)及母岩类型(x6)为自变量,以毛竹平均胸径(y)为因变量,对其进行逐步回归分析,确定影响毛竹生长的主导因子,并以此作为依据进行立地类型划分。结果表明,影响崇阳毛竹胸径大小的主导因子是土层厚度(x5)、母岩类型(x6)及坡位(x2),回归方程为:y=6.332+0.358 x2+0.060 x5-0.662 x6。通过因子分析,将6个立地因子划分为2个主成分,其中第一个主成分映了土壤因子方面的信息,第二个主成分反映了地形因子方面的信息。应用主成分聚类分析方法可将进行崇阳县毛竹立地划分为4种类型:页岩中下坡厚土层立地类型、页岩上坡中土层立地类型、石灰岩中下坡中土层立地类型及石灰岩上坡薄土层立地类型。应该分别不同立地类型,确定毛竹林经营的主要方向,并制定相应的生产描述措施以促进毛竹林高产、稳产与高效。
关键词:毛竹;立地类型;生长特性;崇阳
中图分类号:S718.51+6文献标识码:A文章编号:1004-3020(2016)05-0030-05Site Type Classfication of Phyllostachys pubescens in ChongyangLai Yulin(1)Yin Luhua(2)Chen Cihui(3)Liu Zhengxing(3)Chen Yagang(3)Luo Zishan(1) Zhang Zhuowen(1)
(1. Colloge of horticulture and forestry, Huazhong Agriculture UniversityWuhan430070;2.Chongyang Forestry
BureauXianning437500;3.Chongyang County Guihua Forest Farm Adiministrative BureauXianning437545)
Abstract: Large area Moso bamboo stands in Chongyang had been taken as reseach object, and data from 42 plots had been analyzed in this paper. Taking slope direction (x1), slope position (x2), slope gradient(x3), thickness of soil humus layer (x4), soil layer thickness (x5), and parent rock types (x6) as independent variables, and diameter at breast height(y)as dependent variable, stepwise regression analysis had been done in order to determine main factors affecting Moso bamboo growth, and to divide site types with these main factors. The result showed that the dominant factor which affecting the growth of Moso bamboo diameter at breast height were soil thickness (x5), parent rock types (x6) and slope position (x2), and the regression equation was y=6.332+0.358 x2+0.060 x5-0.662 x6. With factor analysis, 6 site factors could be divided into 2 principal components, i.e. the first one reflecting the information of edaphic factor, and the second one reflecting the information of terrain factor. With plot data it could be divided into 4 site types by means of principal component cluster analysis.The main management direction for each site type should be determined, and the corresponding production plan formulated in order to promote Moso bamboo forest high yield, stability and efficiency.
Key words:Phyllostachys edulis;site type;growth;Chongyang
毛竹Phyllostachys edulis是我国南方最重要的经济竹种。崇阳县土地总面积199 4667 hm2,其中林业用地138万hm2,其中毛竹面积26万hm2,立竹量6 500万株,年产竹笋12万t,年砍竹材450万根,产值16亿元。毛竹广泛分布在全县12个乡镇68个行政村和2个国有林场,集中连片。崇阳不仅是毛竹生产适宜区和丰产区,还是全国的毛竹的中心产区之一。
长期以来,崇阳县的竹林经营理念和管理技术还处在一个比较落后的水平,与浙江省安吉等地毛竹丰产区相比,存在着较大的差距。……
