甘肃人工林云杉形数变化规律研究  

Study on Changing Laws of Tree Form-Factor of Picea asperata Plantations in Gansu Province

作　　者：张旭华 ZHANG Xu-hua(Gansu Administration of Ecological Environment Monitoring and Supervision, Lanzhou 730020, Chin)

机构地区：[1]甘肃省生态环境监测监督管理局,甘肃兰州730020

出　　处：《甘肃林业科技》2017年第4期28-31,共4页Journal of Gansu Forestry Science and Technology

摘　　要：根据甘肃省人工云杉伐倒木(样木)测量数据测算各径阶胸高形数和实验形数,测算形数变动系数,研究人工林云杉形数变化规律。研究结果表明实验形数具有更好的稳定性,实验形数接近常数0.4;人工云杉纯林活立木蓄积量可用胸高断面积和平均树高估算。The paper calculated the each size order form-factor, experimental form-factor and the coefficient of variation of the form-factor, and studied on the change rule of the number of spruce based on the measurement data of Picea asperata plantations felled trees in Gansu Province. The result showed that： The experimental form-factor has better stability and it＇s close to 0.4; The standing volume stock of Picea asperata plantations can be estimated by the breast-height basal area and the estimation average height of the tree.

关 键 词：云杉 实验形数 胸高形数 形数变动系数 

分 类 号：S791.180.1[农业科学—林木遗传育种]