龙竹丛状采伐恢复后林分小气候特征分析  

Microclimate Characteristics of Dendrocalamus giganteus Stand after Cluster Cutting and Restoration

作　　者：陶航 涂丹丹 刘蔚漪[1] 辉朝茂[1] 王友 TAO Hang;TU Dan-dan;LIU Wei-yi;HUI Chao-mao;WANG You(Southwest Forestry University,Academy of Bamboo and Rattan Sciences,Research Center of Clump Bamboo Engineering Technology,Kunming Yunnan 650224,P.R.China;Yunnan College of Economics and Management,Anning Yunnan 650106,P.R.China)

机构地区：[1]西南林业大学,竹藤科学研究院,丛生竹工程技术研究中心,云南昆明650224 [2]云南经济管理学院,云南安宁650106

出　　处：《西部林业科学》2022年第2期124-130,共7页Journal of West China Forestry Science

基　　金：“十三·五”科技支撑课题(2018YFD0600103、2016YFD0600903、2016YFD0600902);云南省省级林业科技推广项目([2018]ts02);国家自然科学基金资助项目(31660173)。

摘　　要：为探讨丛状采伐技术对龙竹林生长的影响,分析4种采伐方式(常规择伐、1/2丛伐、1/3丛伐、全丛采伐)下的龙竹林内小气候因子的变化规律及对竹林生长的影响。结果表明:(1)通过步进回归分析,影响新竹生物量的主要因子是太阳光照强度、土壤温度和空气温度;(2)不同丛状采伐下光照辐射具有明显差异(P<0.05),即全丛采伐样地太阳光照强度均大于1/2丛伐、1/3丛伐和常规择伐;(3)季度内不同丛状采伐处理下的平均土壤温度差异显著(P<0.05),夏季和秋季常规择伐龙竹林内土壤温度皆比其他林分高,春季和冬季又以全丛伐土壤温度最高;(4)通过综合评价得分,采伐强度影响小气候因子排序为:1/2丛伐>全丛采伐>1/3丛伐>常规择伐区。(5)1/2丛伐区新竹生物量为40.95 t/hm^(2),皆大于常规择伐、1/3丛伐和全丛采伐,采伐强度越高,生物量呈下降趋势。研究表明,1/2丛伐是最适宜的丛状采伐方式。研究结果为适用于机械化采伐的龙竹培育技术提供了数据资料,对建立高效龙竹林培育模式与可持续经营和科学管理模式提供参考。In order to investigate the effects of felling techniques on the growth of D.giganteus forest,the changes of microclimate factors and their effects on the growth of D.giganteus forest under four felling methods(conventional felling,1/2 felling,1/3 felling and whole felling)were analyzed in this paper.The results showed that:(1)the main factors affecting the biomass of hsinchu were solar intensity,soil temperature and air temperature through stepwise regression analysis.(2)There were significant differences in light radiation under different felling conditions(P<0.05),that is,the solar light intensity of whole felling was greater than that of 1/2 felling,1/3 felling and conventional felling.(3)There was significant difference in average soil temperature between different felling treatments(P<0.05).The soil temperature in conventional felling was higher than that in other stands in summer and autumn,and the highest soil temperature was in whole felling in spring and winter.(4)According to the comprehensive evaluation score,the order of microclimate factors influenced by felling intensity was 1/2 felling>whole felling>1/3 felling>conventional felling.(5)The biomass of new bamboo in 1/2 felling area was 40.95 t/hm^(2),which was higher than that of conventional selective felling,1/3 felling and whole felling.The higher the felling intensity was,the biomass decreased.The results indicates that 1/2 felling is the most suitable felling method.The results of this study provide data for the cultivation technology of D.giganteus suitable for mechanized cutting,and provide reference for the establishment of efficient cultivation mode and sustainable management and scientific management mode of D.giganteus.

关 键 词：龙竹 丛状采伐 小气候因子 光照强度 土壤温度 空气温度 

分 类 号：S795.9[农业科学—林木遗传育种]