摘要
应用SPSS软件对新疆伊犁地区察布查尔平原林场引种试验筛选出的 11个速生杨树品种 16年的树高、胸径生长数据进行曲线拟合 ,选定Logistic曲线作为树高、胸径的生长模型拟合效果最好 ,并预测了后 10年的生长情况 ,根据新疆杨树二元材积表计算出 11个速生杨树的材积及其平均生长量 ,依据数量成熟龄原则确定了 11个速生杨树品种的数量成熟年龄。
Using the software of SPSS to imitate the growth data of 11 high-yielding poplars,which was selected from the poplar introduced variety experiment in Ili prefecture of Xinjiang ,we choose the Logistic method as the growth model of tree high and tree diameter ,and forecast the 10 years' growth condition.And using the timber volume' duality form of Xinjiang poplar,we calculated the average growth amount of the timber volume of 11 high-yielding poplars,which can instruct the produce of high-yielding poplars in Xinjiang.
出处
《新疆农业大学学报》
CAS
2003年第4期45-48,共4页
Journal of Xinjiang Agricultural University
