摘要
基于黑龙江省5期一类调查数据中587个小黑杨人工林样地,建立了小黑杨人工林生长与收获联立方程组预估模型,采用三步最小二乘法估计模型参数。结果表明:模型拟合及检验结果良好,确定系数(R2)均在0.96以上,模型检验精度均在96%以上,可用于估计黑龙江省小黑杨人工林断面积和蓄积量。
Based onⅠ-class survey data in 5-phase Populous simonii×P.nigra plantation plot,agrowth & yield model system were built.A three-stage least squares method was used to estimate the parameters of the model system.Result of fitting &validation are very well,the determination coefficients(R2)&the test precision are all above 0.96 &96%,respectively.The model system can be used to estimate the basal area and volume of Populous simonii×P.nigra plantation.
出处
《防护林科技》
2017年第8期39-41,共3页
Protection Forest Science and Technology
基金
国家林业局林业科学技术推广项目([2016]36号)
关键词
黑龙江省
小黑杨人工林
生长与收获模型
Heilongjiang Province
Populous simonii×P.nigra plantation
growth and yield model