摘要
基于全挖法测定了海南省国营岛东林场的无性木麻黄的根的生物量,分别采用胸径和树高、地径和树高、地径和胸径及树高、材积作为自变量构建海南木麻黄根生物量生长方程。结果表明,单独以胸径、地径、材积等作自变量都能以较高的精度估算出木麻黄根的生物量,以树高为自变量的根系生物量预测精度不是很理想;采用地径与树高等复合变量的根生物量预测精度有所提高,但不明显;基于胸径、地径、材积等的根生物量估计中,以胸径为自变量的估计精度最高,在无性木麻黄根系生物量估计中,可以根据精度与外业工作量选择合适的估计方法。
We determined the root biomass of clonal Casuarina equisetifolia of the state-run Hainan Island East Forest by whole digging, constructed the root biomass growth equation of C.equisetifolia in Hainan Province with DBH and tree height, ground diameter and tree height, ground diameter and DBH and tree height, volume variable, respectively.The high preci-sion of the C.equisetifolia root biomass can be estimated with separated variable of diameter, root collar diameter, volume, and the prediction precision of root biomass is not very ideal with variable using the tree height.The prediction precision of root biomass can get improvement but not obvious using root collar diameter and tree height composite variables.The esti-mation accuracy of root biomass with diameter variables is highest among diameter, root collar diameter and volume varia-bles, and we can select the suitable estimation method according to the precision and field workload in estimating clonal C. equisetifolia root biomass.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2014年第11期67-71,141,共6页
Journal of Northeast Forestry University
基金
林业公益性行业科研专项(201304320)
关键词
无性木麻黄
根
生物量
地径
海南
Clonal Casuarina equisetifolia
Root
Biomass
Root collar diameter
Hainan
