宁夏贺兰山主要森林树种的含碳率分析

目的]分析宁夏自治区贺兰山自然保护区4种主要森林树种青海云杉、油松、灰榆、山杨不同器官的含碳率,为更大区域森林碳储量研究提供参考。方法]通过实地调查取样、室内实验测定及生物量资料对这4种主要林分地上部分平均含碳率进行了测定分析。结果]宁夏贺兰山4种主要森林树种青海云杉、油松、山杨和灰榆,林分的地上部平均含碳率分别为:0.457 6,0.518 4,0.466 4和0.439 0。同一树种不同组分间的变异系数在1.30%~2.57%间,相同组分的变异系数在0.62%~1.92%间;不同树种不同组分变异系数在0.89%~5.68%间,不同树种相同组分变异系数在4.87%~13.37%间。结论]不同森林类型林分含碳率不同。针叶树种各器官的平均含碳率高于阔叶树种,相应的针叶林分的平均含碳率也高于阔叶林。

Carbon Content Rate Analysis in Main Tree Species of Forest in Helan Mountain of Ningxia Area

Objective] This paper aimed to quantify the carbon content rate(CCR) of different organs of four main tree species (Picea crassifolia, Pinus tabuliformis, Populus davidiana and Ulmus glaucescens)of forest in Helan Mountain, in order to provide reference for study of carbon storage in larger scale regional forest.Methods] CCR of above-ground part was measured using the methods of the field investigation, laboratory assay and the links of it with biomass were analyzed with corresponding coupled biomass data.Results] The results showed that the values of CCR of above-ground part of four tree speices, Picea crassifolia, Pinus tabulaeformis, Populus davidiana and Ulmus glaucescens were 0.457 6, 0.518 4, 0.421 3 and 0.439 0, respectively. In a same tree species, the variation coefficients of different modules were between 1.30% and 2.57%, the values of same module were between 0.62% and 1.92%; the variation coefficients of different modules among the four different trees were between 0.89% and 5.68%, the coefficients of same module of the four different tress ranged between 4.87% and 13.37%.Conclusion] Different tree species have different carbon CCR. The average CCR in the organs of coniferous species was higher than that in the broadleaf species. Accordingly, the average CCR in the coniferous forest was higher than that in the broadleaf forest.