论文部分内容阅读
以古尔班通古特沙漠不同生态型梭梭为研究对象,以过渡径(D)和株高(H)为变量,分别建立了沙质、壤土、盐土和砾石四个生态型梭梭年龄预测模型,经过精度评估和回检得出四种生态型的最优模型。结果显示:在盐土生态型上加权平均年龄为6.81年,最大年龄为22年;砾石生态型加权平均年龄为8.21年,最大的年龄为31年;壤土生态型加权平均年龄为14.59年,最大年龄是36年;沙质生态型加权平均年龄为10.86年,最大的年龄为32年。
Taking the different ecotypes of Haloxylon ammodendron in the Gurbantunggut Desert as the research object, four ecotype Haloxylon ammodendron ages of sandy loam, loamy soil, saline soil and gravel were set up with the transitional path (D) and plant height (H) Predictive model, through the accuracy evaluation and check-back to obtain the four ecological model of the best. The results showed that the weighted average age of salt-soil ecotypes was 6.11 years and the maximum age was 22 years. The weighted average age of gravel ecotypes was 8.11 years and the maximum age was 31 years. The average weight of loamy ecotypes was 14.59 years, the maximum age Is 36 years; sandy weathered type weighted average age of 10.86 years, the maximum age of 32 years.