不同类型油松林生物量碳密度的研究

综合分析了油松林生物量碳密度的估算方法，对油松人工林与天然林、纯林与混交林碳密度进行比较，结果显示：油松天然林乔木层的碳密度（63．34t／hm2）是人工林（42．14t／hm2）的1．5倍，且其变化幅度大于人工林；油松天然林生态系统的碳密度（154．98t／hm2）大干人工林（103．46t／hm2），其变化幅度也较人工林大。油松纯林乔木层碳密度（42．60t／hm2）大于混交林（28．31t／hm2），而生态系统碳密度（95．89t／hm2）小于混交林（109．26t／hm2）。

Research on Biomass Carbon Density of Different Kinds of Pinus tabulaeformis Forests

Carbon densities of P. tabulaeformis planted forest and natural forest, pure forest and mixed forest were com- pared respectively by P. tabulaeformis forest biomass carbon density estimation method. The results showed that carbon density of tree layer （63.34 t/hm2 ） of P. tabulaeformis natural forest was 1.5 times than the planted （42. 14 t/hm2 ）, and the variance was larger than the planted forest. Ecosystem carbon density of P. tabulaeformis natural forest （ 154.98 t/ hm2 ） was more than the planted forest （ 103.46 t/hm2 ）, and the variance was larger than the planted forest. Carbon densi- ty of tree layer of P. tabulaeformis pure forest （42. 60 t/hm2 ） was more than mixed forest （28.31 t/hm2 ）, while ecosystem carbon density of P. tabulaeformis natural forest （95.89 t/hm2） was less than mixed forest（ 109. 26 t/hm2）.