摘要
选择内蒙古鄂尔多斯市杭锦旗常见的沙地植物杨柴进行生物量及其相关因子研究,构建植株个体的生物量估测模型,并从中筛选出与生物量相关性最显著、拟合度最好的生物量估测模型。结果表明,杨柴的最优生物量回归方程为三次函数方程,判定系数R2的范围为0.311~0.762,SEE值范围在0.187~0.84,F检验达到显著性水平。杨柴以DH为自变量的模型最优,模型为y=-0.236+0.017x+1.50E-06x^3(R^2=0.762,p<0.01)。由于灌木的生长状况具有空间异质性,在其他研究区使用该模型时需要进行精度的检验和校正。
This paper studied the biomass and the related factors of Hedysarum mongolicum,a common sandy plant in Hangjin Banner,Ordos City,Inner Mongolia,and constructed the biomass estimation model of individual plant,from which the biomass estimation model with the most significant correlation and the best fitting degree was selected.The results showed that the optimal biomass regression equation was a cubic function equation,the determination coefficient R^2 was in the range of 0.311~0.762,the SEE value was in the range of 0.187~0.84,and the F test was significant.The model with DH as independent variable was the best,which was y=-0.236+0.017x+1.50E-06x^3(R^2=0.762,p<0.01).Due to the spatial heterogeneity of shrub growth,the accuracy of the model should be tested and corrected when used in other research areas.
作者
沈浩
常金宝
郭玉东
SHEN Hao;CHANG Jinbao;GUO Yudong(Inner Mongolia Agricultural University,Hohhot 010020,China)
出处
《林业调查规划》
2020年第2期21-24,共4页
Forest Inventory and Planning
关键词
杨柴
生物量
估测模型
断面周长
沙地灌木
Hedysarum mongolicum
biomass
estimation model
section circumference
sandy shrub
