抚育间伐强度对落叶松次生林水文生态功能的影响  

Effect of Tending Thinning Intensity on Hydroecological and Ecological Function of Secondary Larix Forest

作　　者：张期奇 董希斌 Zhang Qiqi;Dong Xibin(Key Laboratory of Forest Sustainable Management and Environmental Microorganism Engineering of Heilongjiang Province,Northeast Forestry University,Harbin 150040,P.R.China)

机构地区：[1]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),哈尔滨150040

出　　处：《东北林业大学学报》2020年第6期142-145,共4页Journal of Northeast Forestry University

基　　金：国家重点研发计划项目(2017YFC0504103)。

摘　　要：以大兴安岭新林林场为试验区,按照不同抚育间伐强度设置12块(20 m×30 m)样地,分别为对照地CK(0)、P1(6.23%)、P2(13.74%)、P3(16.75%)、P4(19.00%)、P5(20.86%)、P6(25.48%)、P7(27.85%)、P8(34.38%)、P9(40.01%)、P10(47.87%)、P11(51.48%),运用主成分分析法对其林冠层、土壤层、枯落物层的17个水文生态功能指标进行综合分析,计算出各样地的综合评价值,分析抚育间伐强度对落叶松次生林水文生态功能的影响。结果表明:12块样地综合评价值,由大到小依次为P6、P4、P8、P7、P3、P5、CK、P10、P9、P1、P11、P2。随着间伐强度的增加,落叶松次生林水文生态功能基本呈现先增大后减小的趋势,间伐强度大于40.01%或小于13.74%时,综合评价值均小于对照样地(CK),说明适度的抚育间伐作业对大兴安岭天然落叶松次生林的水文生态功能具有促进作用;而在25.48%的抚育间伐强度时,综合评价值达到最大,说明此时落叶松次生林生态水文功能最好。因此,在兴安落叶松天然次生林的经营中,采取适当强度的抚育间伐,能有效促进其水文生态功能的发挥。Taking Daxing’an Mountains Xinlin Farm as the test area,12 plots(20 m×30 m)were set according to different tending thinning intensity,which were control plots CK(0),P1(6.23%),P2(13.74%),P3(16.75%),P4(19.00%),P5(20.86%),P6(25.48%),P7(27.85%),P8(34.38%),P9(40.01%),P10(47.87%),and P11(51.48%).Principal component analysis method was used to comprehensively analyze 17 hydro-ecological function indexes of the forest canopy,soil layer and litter layer,calculate the comprehensive evaluation value of each plot,and analyze the effect of tending thinning intensity on the hydro-ecological function of Larix secondary forest.influences.The comprehensive evaluation values of the 12 plots are P6,P4,P8,P7,P3,P5,CK,P10,P9,P1,P11,P2 in descending order.As the thinning intensity increases,the hydrological and ecological functions of the secondary forest of Larix basically increase and then decrease.When the thinning intensity is greater than 40.01%or less than 13.74%,the comprehensive evaluation value is less than the control plot(CK),indicating a moderate thinning operation has a promoting effect on the hydrological and ecological functions of the natural Larix secondary forest in Daxing’an Mountains.While under the 25.48% tending thinning intensity,the comprehensive evaluation value reaches the maximum,indicating that the Larix secondary forest has the best ecological and hydrological functions.Therefore,in the management of natural secondary L.gmelinii forests,adopting appropriate intensity of tending thinning can effectively promote its hydrological and ecological functions.

关 键 词：落叶松林 抚育间伐 水文生态功能 

分 类 号：S753.7[农业科学—森林经理学] S715.7[农业科学—林学]