不同经营措施对杨桦林林分结构和土壤物理性质的影响  

Influences of different management measures on forest structure and soil physiological characteristics of poplar-birch forest

作　　者：金鑫 JIN Xin(Liaoning Institute of ForestManagement,Dandong 118002,China)

机构地区：[1]辽宁省森林经营研究所,辽宁丹东118002

出　　处：《辽宁林业科技》2018年第2期10-14,共5页Liaoning Forestry Science and Technology

基　　金：国家十三五重点研发计划项目(2017YFC0504100);辽宁省农业攻关计划及成果产业化项目(2015103002)

摘　　要：以20年生杨桦林为对象,研究不同经营措施对其林分结构和土壤物理性质的影响。结果表明:土壤容重0~10 cm土层,强度择伐补植、弱度择伐补植分别比封育区降低14.32%、6.52%,10~20 cm土层分别比封育区降低12.16%、1.95%;最大持水量0~10 cm土层,强度择伐补植、弱度择伐补植分别比封育区提高8.2%、5.18%,10~20 cm土层分别比封育区提高9.85%、5.5%。不同经营措施能降低土壤容重,增加土壤孔隙度、通气性和土壤涵养水源能力,其中以强度择伐补植的效果最好。从林分水源涵养生态效益方面考虑,辽东山区人为促进杨桦林向阔叶红松林恢复过程中宜采用强度或弱度多次抚育间伐,及时调整林分结构,减少林木之间的竞争压力。Influences of different management measures on forest structure and soil physiological characteristics were studied in 20 years old poplar-birch forest.Results indicated that:at 0~10 cm soil layer,soil bulk density of high intensity treatment,and of low intensity treatment was 14.32%and 6.52%lower than that of enclosed forest region respectively,and at 10~20 cm soil layer,12.16%and 1.95%lower than that of enclosed forest region respectively;at 0~10 cm soil layer,high intensity treatment and low intensity treatment increased 8.2%and 5.18%of maximum water holding capacity than that of enclosed forest region respectively,and at 10~20 cm soil layer,increased 9.85%and 5.5%than that of enclosed forest region respectively.Different management measures improved soil bulk density,increased soil porosity,soil aeration and water conservation function.Based on water conservation function,high intensity and low intensity tending and thinning possesses could be applied in promoting poplar-birch forest changing into broadleaf Korean pine mixed forest,which could adjust forest structure timely and reduce competition pressure among tree species.

关 键 词：杨桦林 土壤容重 土壤孔隙度 持水量 

分 类 号：S753.513[农业科学—森林经理学]