毛竹林生物量碳计量参数的初步研究

The preliminary study on biomass carbon accounting factors of Moso bamboo forest

通过文献数据归纳并结合实地调查,对毛竹Phyllostachys edulis(Carr.)H.de Lehaie林生物量碳计量参数进行初步研究。结果表明,竹秆生物量与地上生物量、地下生物量、乔木层生物量的相关性达到极显著水平(P<0.01),可以通过竹秆生物量推测乔木层地上、地下部分生物量。毛竹林生物量扩展因子BEF的实测值为1.259 1±0.041 6(n=42),理论值为1.265 8±0.030 2;毛竹林根茎比R实测值为0.960 8±0.338 5,理论值R值为0.900 1±0.243 0,实测值与理论值之间没有显著差异(P>0.05)。在毛竹林生物量测定中,可以通过BEF值和R值准确推算竹林生物量。BEF与立竹度显著负相关(P<0.05,n=33),随着立竹度的增大,BEF值线性降低;毛竹林R值与年龄结构极显著正相关(P<0.01,n=33),R值随着新竹比例的增加成幂函数增加。通过测定立竹密度和年龄结构等因子可以进一步提高BEF值和R值的精度。

Study on the biomass carbon accounting factors of Moso bamboo （Phyllostachys edulis （ Carr. ） H. de Lehai） forest was carried out by the data induction of published literature and the field survey. The results showed that there was a great significant correlation （P〈0.01） between the biomass of stem and the biomass of aboveground, the biomass of aboveground as well as the biomass of underground, which indicated that the biomass of tree layer could be calculated with the biomass of stem. The measured value of biomass conversion and expansion factor （BEF） for Moso bamboo forest was 1.259 1±0.041 6（ n=41 ）and that of theoretical value was 1.265 8±0.030 2. The measured value of the root： shoot ration （R） was 0.960 8±0.338 5 which was higher than that of theoretical value with 0.900 1±0.243 0. However, there was no significant difference between the measured value and the theoretical one （ P〉0.05 ） for both BEF and R. Therefore, the values of BEF and R could be used for the biomass calculation of Moso bamboo forest accurately. There was a significantly negative correlation with linearly dependence between the BEF value and the bamboo densities （ P〈0.05 ） . There was a great significant positive correlation between the R value and the age structure of bamboo forest （ P〈0.01 ） . The value of R presented a power function rise along with the increased proportion of new bamboo stems. These results indicated that the accuracy of both BEF value and R value could be further increased through the measurement of the site bamboo density and the age structure of bamboo forest.