浙江林业科技
浙江林業科技
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JOURNAL OF ZHEJIANG FORESTRY SCIENCE AND TECHNOLOGY
2014年
4期
21-24
,共4页
何仁华%邱永华%徐佳%孔振%董大川%高培军
何仁華%邱永華%徐佳%孔振%董大川%高培軍
하인화%구영화%서가%공진%동대천%고배군
毛竹%胸径%秆高%秆重%回归分析
毛竹%胸徑%稈高%稈重%迴歸分析
모죽%흉경%간고%간중%회귀분석
Phyllostachys heterocycla cv. pubescens%DBH%culm height%culm weight%regression analysis
以毛竹(Phyllostachys heterocycla cv. pubescens)为研究对象,通过测定3度毛竹、4度毛竹砍伐后的胸径、秆高和秆重等因子,建立毛竹胸径、秆高与秆重的多元线性方程:Y1=8.336X1+2.882X2-70.954(模型的回归系数为0.933),Y2=8.613X1+2.670X2-69.310(模型的回归系数为0.982),其中,X1为胸径,X2为秆高,Y1为3度(5年生)毛竹秆重,Y2为4度(7年生)毛竹秆重,经检验方程具有实际意义,可以作为毛竹竹材采伐量快速估算模型。
以毛竹(Phyllostachys heterocycla cv. pubescens)為研究對象,通過測定3度毛竹、4度毛竹砍伐後的胸徑、稈高和稈重等因子,建立毛竹胸徑、稈高與稈重的多元線性方程:Y1=8.336X1+2.882X2-70.954(模型的迴歸繫數為0.933),Y2=8.613X1+2.670X2-69.310(模型的迴歸繫數為0.982),其中,X1為胸徑,X2為稈高,Y1為3度(5年生)毛竹稈重,Y2為4度(7年生)毛竹稈重,經檢驗方程具有實際意義,可以作為毛竹竹材採伐量快速估算模型。
이모죽(Phyllostachys heterocycla cv. pubescens)위연구대상,통과측정3도모죽、4도모죽감벌후적흉경、간고화간중등인자,건립모죽흉경、간고여간중적다원선성방정:Y1=8.336X1+2.882X2-70.954(모형적회귀계수위0.933),Y2=8.613X1+2.670X2-69.310(모형적회귀계수위0.982),기중,X1위흉경,X2위간고,Y1위3도(5년생)모죽간중,Y2위4도(7년생)모죽간중,경검험방정구유실제의의,가이작위모죽죽재채벌량쾌속고산모형。
Determination was made on DBH, height and weight of fell 5- and 7-year Phyllostachys heterocycla cv. pubescens. Multivariate linear equations were established as Y1= 8.336X1+2.882X2-70.954 (regression coefficient = 0.933), Y2 = 8.613X1+2.670X2-69.310 (regression coefficient=0.9820), in which X1=DBH,X2=height,Y1=weight of 5-year culm, and Y2=weight of 7-year culm.