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当前位置: 首页 > 文章 > 不同放置方式下马尾松人工林凋落物分解动态 贵州林业科技 2016,44 (2) 8-12
Position: Home > Articles > Comparison of litter decomposition Dynamic of Pinus Massoniana plantation in different Litter placed position Guizhou Forestry Science and Technology 2016,44 (2) 8-12

不同放置方式下马尾松人工林凋落物分解动态

作  者：
周鑫伟;李志辉
单  位：
中南林业科技大学林学院
关键词：
马尾松;人工林;凋落物分解;放置方式
摘  要：
以贵州省龙里林场12年马尾松人工林为研究对象,对比研究了不同放置方式下3种密度马尾松凋落物分解动态。结果表明,马尾松人工林表层和底层凋落物损失率在不同密度间变化趋势均相近,大致呈指数衰减方式降低。表层凋落物指数衰减模型S1200为R(t)=e~(-0.058t),S1767为R(t)=e~(-0.057t),S2167为R(t)=e~(-0.064t),表层凋落物在高密度林分分解较快;底层凋落物指数衰减模型S1200为R(t)=e~(-0.056t),S1767为R(t)=e~(-0.062t),S2167为R(t)=e~(-0.076t),林分密度越高底层凋落物分解越快。凋落物周转期在3.3~4.5年范围,底层凋落物周转期较之表层短约半年。放置方式的差异凋落物分解动态、损失率、周转期等均存在差异,总体而言,放置在底层的凋落物分解速率快于放置于表层。
译  名：
Comparison of litter decomposition Dynamic of Pinus Massoniana plantation in different Litter placed position
作  者：
ZHOU Xin-wei;LI ZHi-hui;College of forestry,Central South University of Forestry and Technology;
关键词：
Pinus Massonana;;plantation;;litter decompositon;;litter placed position
摘  要：
Taking the 12- year- old Pinus Massoniana plantations at Longli Forest Farm in Guizhou Province as a study,litter decomposing dynamics of three density in different litter placed position were examined. The results were as follows : loss ratio of surface and undersurface litter had a similar trend "exponential decay type"among plantations of different density. Surface litter "exponential decay model"of S1200 was R( t) = e~(-0.058 t),S1767 R( t) =e~(-0. 057) t,and S2167 R(t) = e~(-0. 064 t),surface litter decomposed rapid in high density stand. Undersurface litter "exponential decay model"of S1200 was R( t) = e~(-0.056 t),S1767 was R( t) = e~(-0.062 t),S2167was R( t) = e~(-0.076 t). Litter decomposed more quickly in high density plantation. Litter turnover period was in the range of 3. 3 ~ 4. 5 year,and litter turnover period was shorter about half year placed on the undersurface than on the surface. Litter decomposition dynamic,loss ratio,and litter turnover period were changed with litter placed position.Overall,litter decomposition speed when placed undersurface was higher than surface.

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