马尾松肉桂人工复层林碳储量及其分布格局  

Carbon Storage and Distribution Pattern in Stratified Mixed Stand of Pinus massoniana and Cinnamomum cassia

作　　者：罗叶红[1] 姚贤宇 汤文艳[1] 刘洪 杨梅[1] 

机构地区：[1]广西大学林学院,南宁530004 [2]梧州市林业技术推广站,广西梧州450404

出　　处：《广西林业科学》2016年第1期68-74,共7页Guangxi Forestry Science

基　　金：广西林业科技项目(林科字[2006]第09号;桂林科字[2009]10号;桂林科字[2014]第24号);梧州市科学研究与技术开发计划项目(201101013)

摘　　要：对20年生马尾松(Pinus massoniana)人工林进行5种不同强度的疏伐,伐后郁闭度分别为0.4(T1),0.5(T2),0.6(T3),0.7(T4),0.8(T5),后在其林下套种肉桂(Cinnamomum cassia),形成马尾松、肉桂人工复层林,应用相对生长法和样方收获法研究其不同混交模式林分碳储量及空间分布。结果表明,碳素含量大小排序为乔木层>枯落物层>灌木层>草本层>土壤层,分别为(475.96±13.59)、(469.64±2.41)、(443.34±2.04)、(425.94±2.03)、(21.10±0.35)g/kg。乔木层中马尾松各不同处理平均碳素含量排序为T1>T4>T3>T5>T2;肉桂平均碳素含量大小排序则为T2>T4>T1>T3。在5个不同处理中,碳储量的空间分布序列均表现一致:乔木层>土壤层>枯落物层>灌木层>草本层。乔木层和枯枝落叶层的碳储量随着林分郁闭度增加而增加,而灌木层、草本层以及土壤层碳储量则表现出相反的变化趋势。5个不同处理中,以马尾松纯林的碳储量高于其它4个不同混交;马尾松肉桂以1∶5.4比例混交时,总碳储量在混交林中最大,达117.32t/hm2,且乔木层大于纯林,林分固碳效果最佳。After five different thinning intensities in 20-year-old Pinus massoniana plantation, canopy densities were 0. 4 （ T1 ）, 0. 5 （ T2）, 0. 6 （ 33 ）, 0.7 （ T4）, 0. 8 （ T5 ）, and then, in the forest, Cinnamomum cassia was interplanted, forming stratified mixed stand of Pinus massoniana and Cinnamomum cassia. Using relative growth method and quadrate harvest method, carbon storage and spatial distribution were studied in different mixed modes. Results showed that carbon content was in the order of tree layer 〉 litter layer 〉 shrub layer 〉 herb layer 〉 soil layer, which were 475.96 ± 13.59 g/kg, 469.64 ±2.41 g/kg, 443.34 ± 2.04 g/kg, 425.94 ±2.03 g/kg and 21.10 ± 0. 35 g/kg respectively. Average carbon content in tree layer of Pinus massoniana with different treatments was in the order of T1 〉 T4 〉 T3 〉 T5 〉 T2, which in Cinnamomum cassia was T2 〉 T4 〉 T1 〉 T3. In five different treatments, spatial distribution sequence of carbon storage was the same with tree layer 〉 soil layer 〉 litter layer 〉 shrub layer 〉 herb layer. Carbon storage in tree layer and litter layer increased with increase of stand canopy density, which in shrub layer, herb layer and soil layer showed opposite trend. In five different treatments, carbon storage in pure stand of Pinus massoniana was higher than the others. When Pinus massoniana and Cinnamon cassia mixed with the proportion of 1 ： 5.4, total carbon storage was the largest reaching 117.32 t/hm2 , and tree layer was greater than pure forest with the best carbon sequestration effect.

关 键 词：马尾松 肉桂 人工林 碳储量 分布格局 

分 类 号：S794.9[农业科学—林木遗传育种] S753.75[农业科学—林学]