摘要
通过文献数据归纳并结合实地调查，对北沙柳人工灌木林生物量碳计量参数进行初步研究。结果表明：可以通过灌高与冠幅推测灌木地上部分生物量，二者的相关方程为Y=0．7826（D2H）^0.8913（n=32，R^2=0．82）；沙柳林根茎比R的实测值为2．64（n=9），大于IPCC推荐的缺省值0．4；在沙柳林生物量测定中，可以通过林地平均冠幅、灌高、盖度和R值准确推算沙柳林生物量。单位面积地上生物量（B）为9．02t／hm^2（n=37），在不同立地类型存在差异。沙柳林R值随着平茬间隔期增加成幂函数减少。在进行沙柳林生物量碳计量和使用时需考虑平茬期和植被盖度，有利于降低计量中的不确定性。本研究结果适用于平茬后3年，盖度为30％～60％的沙柳人工灌木林生物量碳计量。沙柳林生物量碳计量参数尚需进一步研究。
Study on the biomass carbon accounting factors of Salix psammophila shrubs was carried out by the data induction of published literature and the field survey. The results showed that there was a great significant correla- tion between crown width, height and the above -ground biomass, which indicated that the above -ground biomass could be calculated with y = 0. 7826 （D2H） ^0. 8913（ n = 32, R^2 = 0. 82 ）. The value of the root -to -shoot ratio （R） was 2. 64 （n =9）, which was higher than the IPCC value with 0. 4. The value of the biomass in unit area （B） was 9. 02 t/hm^2 （ n = 37 ）. Therefore, the crown width, height and the values of R could be used for the biomass calcula- tion of Salix psammophila. The value of B was different from site types. The value of R presented a power function decreased along with the increased time after stumping. This study was suitable for the biomass carbon accounting of Salix psammophila shrubs with vegetation coverage at 30%～ 60% after stumping for 3 years. It is better to con- sider stumping age and vegetation coverage on accounting biomass carbon of Salix psammophila shrubs. The rela- tionships among these biomass factors deserve further study.
出处
《内蒙古林业科技》
2015年第2期1-3,12,共4页
Journal of Inner Mongolia Forestry Science and Technology
基金
内蒙古自然科学基金项目(2012MS0518)资助
关键词
沙柳林
生物量碳计量参数
单位面积地上生物量
根茎比
Salix psammophila shrubs
biomass carbon accounting factor
above- ground biomass in unit area
root - to - shoot ratio
