摘要
为了深入理解宝天曼保护区内林窗的形成特征及其形成与林窗边缘木的关系,对核心区内25 hm2固定监测样地的林窗进行了研究.结果表明,样地内林冠林窗(CG)和扩展林窗(EG)分别为36个和46个,CG的平均面积为18.2 m2,以<15 m2的数量比最大,而31～45 m2的面积比最大,分别为53%和29%;EG的平均面积为133.6 m2,以101～150 m2的数量比和面积比最大,分别为48%和42%;林窗形成木主要以锐齿槲栎(Quercusaliena)为主,其次是华山松(Pinus armandi)和葛罗槭(Acer grosseri),各占林窗形成木的65.5%,21.8%和3.6%;倒树、枯树或平地是林窗形成的主要原因,各占形成林窗的8.9%,55.6%,5.5%;林窗边缘木主要以锐齿槲栎(Quercus aliena)为主,胸径范围为20～50 cm.
The forest gaps of the core area of 25 hm2 fixed monitoring plots in the Baotianman were studied in order to understand deeply the forest gap formation characteristics and the correlation be-tween gap and edge wood in Baotianman Nature Reserve. The result showed that： the CG and EG were 36 and 46 in plot, the average area of CG is 18.2 m^2, the forest gap area 〈15 m^2 is the maximum quantity in plot, and 31 -45 ms area is the maximum area in plot, respeciively 53% and 29%, the average area of EG is 133.6 ms , the area of 101 - 150 m2 has the maximum quantity and area , for 48% and 42% , respectively. Quercus aliena var. acutiserrata is the main gap formation wood in per-manent plot, next comes is the Pinus armandii and Acer grosseri, each accounting for 65.5% ,21.8% and 3.6% in forest gap formation it has wood, which reflects the diversity of the species of this area; the less big gaps the area has, the more small gaps; forest gaps were caused by a variety of reasons, such as fallen trees, dead trees or the ground, each forming gaps accounting for 38.9% ,55.6% and 5.5%. Quercus aliena is the main gap edge wood in plot, the diameters at breast height ranging from 20 to 50 cm, 30 to 40 cm are the maximum of number.
出处
《河南农业大学学报》
CAS
CSCD
北大核心
2012年第5期542-548,共7页
Journal of Henan Agricultural University
基金
"十一五"科技支撑计划项目(2008BADB0BO301)
关键词
林窗
枯木
林隙
林冠
形成木
边缘木
forest gap
dead wood
gap
canopy
gap maker
edge wood
