小兴安岭低质林采伐改造后土壤理化性质变化分析  

Change in Soil Physical and Chemical Properties of Low-quality Forest Stands in Lesser Xing'an Range after Alteration by Logging

作　　者：刘美爽[1] 董希斌[2] 郭辉[2] 蒙宽宏 范煜婷[4] 

机构地区：[1]东北林业大学,哈尔滨150040 [2]森林持续经营与环境微生物工程黑龙江省重点实验室(东北林业大学) [3]黑龙江林业科学研究所 [4]中国科学院新疆生态与地理研究所

出　　处：《东北林业大学学报》2010年第10期36-40,共5页Journal of Northeast Forestry University

基　　金：黑龙江省重大科技攻关项目(GA07B301-05)

摘　　要：运用主成分分析法,针对不同采伐方式小兴安岭低质林分土壤理化性质变化程度进行分析,结果表明:不同的采伐方式对土壤理化性质产生不同的影响,林窗带的理化性质变化程度最大,其次为垂直皆伐带和择伐带,水平皆伐带的变化程度最小。带宽方面:水平皆伐带和垂直皆伐带带宽的综合得分并没有明显差异;林窗方面:在林窗A9(面积900m2)处理化性质的变化程度最小,A3(面积100m2)和A5(面积225m2)处的变化程度较大;采伐强度方面:在采伐强度22%处土壤理化性质变化最大,在采伐强度31%和41%处土壤理化性质的变化程度较小,在采伐强度47%和55%处土壤理化性质变化程度又变大,而采伐强度66%和77%处土壤理化性质变化程度变小。从对土壤理化性质影响程度角度选择合理的采伐方式,以水平皆伐最宜,其次为采伐强度31%和41%的择伐,再次为面积较大的林窗,最后为垂直皆伐。The variance in soil physical and chemical properties of low-quality forest stands in Lesser Xing＇an Range was analysed under different logging patterns by the principal component analysis.Results show that different logging patterns have different impact on soil physical and chemical properties.In the forest gap,soil physical and chemical properties exhibit the most obvious change,followed by the vertical clear-cutting zone,the selective-cutting zone and the horizontal clear-cutting zone.There is no significant difference in the comprehensive score of band width between the horizontal clear-cutting zone and the vertical clear-cutting zone.Soil physical and chemical properties display the least changing extent at A9（the area is 900m^2）and the larger ones at A3（100m^2）and A5（225m^2）.The changing extent of soil physical and chemical properties is largest in the forest at cutting intensity of 22 percent,while it is quite small at 33 percent or 41 percent,then it again becomes quite large at 47 percent and 55 percent,and finally it becomes small at 66 percent and 77 percent.The horizontal clear-cutting zone is the best in terms of the influence extent on soil physical and chemical properties,followed by the selective-cutting zone at 22 percent,the forest gap with a big area,and the vertical clear-cutting zone.

关 键 词：低质林 采伐方式 土壤理化性质 主成分分析 

分 类 号：S714.2[农业科学—林学] S756.5