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湘中丘陵区马尾松林粗木质残体研究

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以湘中丘陵区马尾松林为研究对象,分析粗木质残体(CWD)的储量特征、物种组成、径级结构以及腐烂等级,研究湘中丘陵区马尾松林 CWD 的基本特征。结果表明:湘中丘陵区马尾松林 CWD 的平均储量为1.72 t/hm2,马尾松和杉木是针叶 CWD 的主要组成树种,樟树、南酸枣、枫香是阔叶 CWD 的主要组成树种。马尾松-阔叶树种混交林的 CWD 总储量显著大于马尾松-杉木混交林的,两者的 CWD 总储量与其对应森林总生物量的比例差异明显,且均表现为随森林生物量增长而增加的趋势。CWD 的个体数量随着径级的增加而减少,呈反 J 型下降趋势,且不同存在形式 CWD 的数量比例大致表现为倒木>枯立木>大枝>根桩。CWD 具备完整的腐烂等级(Ⅰ~Ⅴ级),主要集中在Ⅰ、Ⅱ腐烂等级,且随着径级的增加,各腐烂等级 CWD 的数量比例呈现逐渐减少的趋势。
Coarse woody debris in a Pinus massoniana forest in the hilly area of Central Hunan Province
The characteristics of storage,species composition,DBH class and decay class of coarse woody debris (CWD)were studied in a Pinus massoniana forest in the hilly area,Central Hunan Province.The results showed the av-erage storage of CWD was 1.72t/hm2 ,the conifer tree specie of CWD were Pinus massonianaand Cunninghamia lanceo-lata,the broad-leaved tree specie of CWD were Cinnamomum camphora、Choerospondias axillarisand Chinese sweet gum.The storage of the area of mixed of P.massonianaand broad-leaved tree species significantlly bigger than the area of mixed of P.massonianaand C.lanceolata,showed with the increase of forest biomass has a growth trend.The density of CWDs decreased as increase of DBH class,and followed the inverse J-shape,the ratio showed log >snag >branch >stump.The CWD had all classes (class I to V)with a focus of decay classⅠandⅡ,the decay class of CWDs decreased with increase of DBH class.

Pinus massoniana forestcoarse woody debrischaracter of storageDBH (diameter at breast height) classdecay class

张超、熊嘉武、舒勇、刘扬晶、潘登

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国家林业局中南林业调查规划设计院,湖南 长沙 410014

中南林业科技大学生命科学与技术学院,湖南 长沙 410004

马尾松林 粗木质残体 储量特征 径级结构 腐烂等级

中南林业科技大学研究生科技创新基金资助项目

CX2015A03

2015

湖南林业科技
湖南省林学会,湖南省林业科学院,湖南省林业厅科技信息中心

湖南林业科技

影响因子:0.572
ISSN:1003-5710
年,卷(期):2015.(4)
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