云南金沙江干热河谷地区麻疯树生物量的变化

Biomass Change of Jatropha curcas in Dry-hot Valley Areas of Jinsha River in Yunnan

为实现麻疯树资源的可持续利用和科学管理,并为估算麻疯树生态系统的碳汇提供依据,于2009年7月对云南省金沙江干热河谷地区的元谋、永胜、华坪3县半野生的麻疯树进行了生物量调查。结果表明：6~15年生麻疯树生理活动达到高峰期,生物量迅速增加;地上部分生物量与主干、叶、枝条的生物量符合线性模型,各构件生物量与树龄的关系符合生长曲线模型,其中地上部分生物量与树龄的关系符合3次曲线方程,地下部分生物量与树龄的关系符合逻辑曲线方程;地上部分各构件生物量比率随树龄的变化呈不同的变化规律;根系中主根生物量最大,占全根系的58.7%~82.6%,须根最小,仅占0.7%~6.2%。

The biomass of semi-wild Jatropha curcas in Yuanmou,Yongsheng and Huaping counties（dry-hot valley areas of Jinsha River in Yunnan） was surveyed in 2009 to realize sustainable utilization and scientific management of Jatropha curcas resource and provide the basis for estimating carbon sink of Jatropha curcas ecological system.The results showed that the physiological activity of Jatropha curcas with 6～15 years old reached the peak,its biomass increased rapidly,there was a linear model in biomass between the aerial part and trunk,leaf,branch,the relationship between biomass of different parts and tree age fitted the growth curve model,the relationship between aerial part biomass and tree age fitted the cubic curve equation,the relationship between biomass of underground part and tree age fitted the logic curve equation,the biomass ratio between different aerial parts showed different variation regulation with change of tree age,the biomass of main root was maximum（58.7%～82.6%） and the biomass of fibrous root was minimum（0.7%～6.2%）.