宝天曼马尾松和槲栎混交林的竞争关系分析  

The Competitive Relationship of Pinus massoniana and Quercus aliena Mixed Forest in Baotianman National Nature Reserve

作　　者：陈诗[1] 海鑫 史训旺 叶永忠 袁志良 房会普 刘晓静 王婷[1] Chen Shi;Hai Xin;Shi Xunwang;Ye Yongzhong;Yuan Zhiliang;Fang Huipu;Liu Xiaojing;Wang Ting(College of Forestry,Henan Agricultural University,Zhengzhou Henan 450002,China;Administration Bureau of Baotianman National Nature Reserve,Nanyang Henan 474350,China)

机构地区：[1]河南农业大学林学院,河南郑州450002 [2]河南宝天曼国家级自然保护区管理局,河南南阳474350

出　　处：《西南林业大学学报（自然科学）》2018年第2期10-15,共6页Journal of Southwest Forestry University：Natural Sciences

基　　金：国家自然科学基金项目(31270493)资助

摘　　要：选取宝天曼国家级自然保护区内1 hm2(100 m×100 m)的马尾松-槲栎混交林作为研究样地,对样地内所有林木(胸径≥1 cm)进行调查,并利用Hegyi竞争指数模型对马尾松的种内种间竞争关系进行研究。结果表明:样地内对象木马尾松大径级个体较多,幼苗较少,个体数量随着径级的增大逐渐增多,竞争木共1 581株,幼龄树较多,个体数量随着径级的增大逐渐减少;对象木马尾松受到的种内竞争总强度(244.92)大于种间竞争总强度(176.10),且种内竞争强度随着径级的增大而增大,种间竞争强度随着径级的增大而减小;其他种类的竞争木对对象木马尾松产生的竞争强度从大到小依次为麻栎>槲栎>化香>栓皮栎>红皮云杉>小叶青冈>锐齿槲栎>山胡椒>槲树;对竞争强度与对象木胸径进行函数回归拟合,二者符合指数函数关系CI=AeBD(P<0.01),此模型能很好的预测样地内马尾松种内和种间竞争强度。1n this study,one hm2(100 mX 100 m)Pinus massoniana and Quercus aliena mixed forest was selected in Baotianman National Nature Reserve as sample plot.All trees in the plot(DBH^1 cm)were investiga-ted,and intra and inter species competition of P.massoniana was studied by Hegyi competition index model.The results showed that there were many large diameter trees,but less seedlings,and the number of P.massoniana in-creased gradually with the increase of diameters.There were 1 581 competitive trees,of which were many young trees and the number of competitive trees decreased gradually with the increase of diameters.The total intensity of intraspecific competition about object woods(244.92)was much larger than that of interspecific competition(176.10)and the intensity of intraspecific competition of P.massoniana increased with the increase of DBH,while the intensity of interspecific competition decreased with it.The other competitive trees had competitive pressure on P.massoniana and the sorted relationship was Quercus acutissima>Quercus aliena>Platycarya strobilacea>Quercus variabilis>Picea koraiensis>Cyclobalanopsis myrsinifolia>Quercus aliena var.acutiserrata>Lindera glauca>Ulmus pumila.A function regression was performed to simulate the correlation between diameter and intensity ol the com-petition.It is founded that there was an exponential relationship between them with significant correlation CI=ArBD(P<0.01),this model could be used to predict the community competition of P.massoniana in the plot.

关 键 词：自然保护区 混交林 马尾松 槲栎 种内 种间 竞争强度 

分 类 号：S718.5[农业科学—林学]