摘要
以合肥市内道路、公园和单位附属绿地的广玉兰为对象,据外业调查数据,选择Richards,logistic,Gompertz,Weibul和S曲线5种生长方程,研究广玉兰胸径、树高、冠幅与年龄的相关关系,并对拟合效果进行对比分析,建立生长模型。道路上广玉兰的胸径生长模型为Y=4 807.694 25/((1+6 222.541 45×exp(0.060 55X))^(1/1.357 46)),树高生长模型为Y=11 162.752 7/((1+18 677.171 3×exp(-0.049 999X))^(1/1.199 5)),冠幅生长模型为Y=18.316 3×(1-exp(-((X-3.190 7)/183.413 8)^0.468 129));公园和附属绿地内广玉兰的胸径生长模型为Y=64.832 8/((1-0.447 484×exp(-0.056 236X))^(1/-0.124 092)),树高生长模型为Y=18.972 1/((1+0.128 150×exp(-0.095 568X))^(1/0.024 720)),冠幅生长模型为Y=812.463 8×(1-exp(-((X+9.152 7)/593.934 1)^1.678 9))。
Based on the data collected from Hefei city,five growth equations were utilized to establish the correlation between age and DBH（diameter at breast height）,height,crown width growth respectively.The fitting effect of these equations was compared and to establish growth models for Magnolia grandiflora.The DBH growth model of Magnolia grandiflora on street＇s roadside was Y=4807.69425/（（1＋6222.54145×exp（0.06055X））^（1/1.35746））,Height growth models was Y=11162.7527/（（1＋18677.1713×exp（-0.049999X））^（1/1.1995））,Crown width growth models was Y=18.3163×（1-exp（-（（X-3.1907） /183.4138）^ 0.468129））;The DBH growth model of Magnolia grandiflora in the parks and units was Y=64.8328/（（1-0.447484×exp（-0.056236X））^（1/-0.124092））,Height growth model was Y=18.9721 /（（1＋0.128150×exp（-0.095568X））^（1/0.024720））,and crown width growth model was Y=812.4638×（1-exp（-（（X＋9.1527）/593.9341）^1.6789））.
出处
《安徽农业大学学报》
CAS
CSCD
北大核心
2010年第4期655-660,共6页
Journal of Anhui Agricultural University
关键词
广玉兰
胸径
树高
冠幅
生长模型
Magnolia grandiflora
DBH
height
crown width
growth model
