文献类型：期刊文献

中文题名：小桃家沟流域混交林空间结构及稳定性研究

英文题名：Spatial structure and stability characteristics of Pinus sylvestris var. mongolica mixed forest in Xiaotaojiagou watershed

作者：张佳鹏[1,2] 贾志清[1,2,3] 李清雪[2,3] 何凌仙子[2,3] 高娅[1,2] 王陇[1,2] 韩东[1,2]

第一作者：张佳鹏

机构：[1]中国林业科学研究院林业研究所,北京100091;[2]青海共和荒漠生态系统定位观测站,共和813099;[3]中国林业科学研究院生态保护与修复研究所,北京100091

年份：2023

卷号：37

期号：3

起止页码：121-128

中文期刊名：干旱区资源与环境

外文期刊名：Journal of Arid Land Resources and Environment

收录：北大核心:【北大核心2020】；CSCD:【CSCD2023_2024】；

基金：国家重点研发计划项目(2020YFF0305905-5);国家林业和草原局林草科技创新发展与研究项目(2021132007);中国林业科学研究院林业研究所专项资金项目(LYSZX202003)资助

语种：中文

中文关键词：森林群落稳定性;π值法则;空间结构;樟子松混交林;崇礼赛区

外文关键词：forest community stability;πvalue rule;spatial structure;Pinus sylvestris mixed forest;Chongli competition area

分类号：S718.5

摘要：以冬奥会场馆(崇礼赛区)周边小桃家沟流域上、中、下游樟子松混交林为研究对象,分别设置25个20m×20m样方,并测量林木的胸径、树高,分析样地内林分空间结构指标特征及其林分稳定性。结果表明,一元分布中,流域上、中、下游平均角尺度值均在0.475-0.517之间,均为随机分布;流域下游混交林平均大小比数最小,其次为中游,上游平均大小比数最大,流域下游混交林平均混交度最高,平均混交度值为0.41。二元分布中,流域下游混交林的大小比数(U)在0-0.25且为随机分布(W=0.5)状态、混交度(M)在0.75-1.00且为随机分布(W=0.5)状态、混交度(M)在0.75-1.00且大小比数(U)在0-0.25的林木所占比例相较于流域上、中游均最高,分别为34.99%、20.37%和10.11%;最优林分状态的π值法则表明,流域上游混交林林分状态为极差,流域中游和下游林分状态均较差,与流域上游和中游相比,下游混交林整体稳定性最好。
The mixed forest of Pinus sylvestris var.mongolica in the upper,middle and lower reaches of the Xiaotaojiagou watershed around the Winter Olympic venues(Chongli competition area)was chosen as the research object,25 of 20m×20 m quadrat were set up,the DBH and tree height of trees were measured,and the characteristics of stand spatial structure index and stand stability in the sample plots were analyzed.The results show that,in the univariate distribution,the average uniform angle index values of forests in the upper,middle and lower reaches of the basin are all in range of 0.475-0.517,which are randomly distributed.The average neighborhood comparison of mixed forest in the lower reaches of the basin is the smallest,followed by the middle reaches,and the average neighborhood comparison in the upper reaches is the largest.The average mingling of mixed forest in the lower reaches of the basin is the highest,with an average value of 0.41.In the binary distribution,compared with the upper and middle reaches of the basin,the proportion of trees with mixed forest size ratio(U)of 0-0.25 and random distribution(W=0.5),mixed degree(M)of 0.75-1.00 and random distribution(W=0.5),mixed degree(M)of 0.75-1.00 and size ratio(U)of 0-0.25 is the highest,taking 34.99%,20.37%and 10.11%,respectively.Theπvalue rule of the optimal forest state shows that the state of the mixed forest in the upper reaches of the basin is extremely poor,and that in the middle and lower reaches of the basin is poor.Compared with the upper and middle reaches of the basin,the overall stability of the mixed forest in the lower reaches is the best.