汉中地区杨树不同品种材积生长差异性研究

Study on the Differences of Volume Growth of Different Poplar Varieties in Hanzhong Area

为探明引进的杨树新品种材积生长差异及趋于数量成熟时的最大材积生长量,确定主栽品种。随机选取8个品种进行了伐倒木材积测定及分析,结果为:中林2025杨17 a材积生长量为0.2960 m^(3)最大,圣山杨材积生长量为0.1669 m^(3)最小。经方差分析表明:8个品种材积生长量对F 0.05、F 0.01差异均极显著;中林2025杨、欧美杨108号、山哈杨材积生长较优,是汉中区域经营短周期材用林最理想的杨树品种。对17a生8个品种伐倒木测定计算结果及生长趋势分析,其径生长对材积生长量起主要决定作用。

In order to find out the differences of volume growth and the maximum volume growth of new introduced poplar varieties,the main varieties were determined.Eight varieties were randomly selected to measure and analyze the volume of felled wood.The volume growth of Zhonglin 2025 poplar 17a was 0.2960 m^(3),and that of Shengshan poplar was 0.1669 m^(3).The analysis of variance showed that the volume growth of 8 varieties had significant difference to F 0.05 and F 0.01.Zhonglin 2025 poplar,Populus×euramericana‘Guariento’108 and Shanha poplar are the most ideal poplar species for short-cycle timber forest in Hanzhong.Based on the measured results and the analysis of the growth trend of 8 species felled wood in 17 years,the diameter growth of 8 species felled wood plays a major role in determining the volume growth.