龙脑型阴香截顶采收技术研究

以2年生龙脑型阴香Cinnamomum burmannii chvar. Borneol幼林为研究对象，开展截顶采收技术试验，试验设置4个截顶高度，每个截顶高度内又采用3种下部枝条处理模式。通过对2个年度3次调查数据进行分析，结果表明树高、地径、冠幅和可蒸生物量4个性状不同区组间本底差异不大，处理后4个性状不同处理间差异显著加大，且均达极显著水平；多重比较也从本底的2个DUNNCAN分组提升至3～4个分组，且可以看出随着截干高度的提升，4个性状指标逐渐提升；在留枝方面，保留枝条越少，4个性状指标数值越小。因此，采收以120 cm高度截顶后保留下部枝条(H4-T1组合)为最佳处理。

Truncated Harvesting Technology of Cinnamomum burmannii chvar. Borneol

In order to standardization of harvesting techniques for dwarf forest of Cinnamomum burmannii chvar. Borneol, the cutting and harvesting technology was studied in the 2-year-old young forest, 4 truncation heights were set, and 3 sub-branch processing modes were adopted to carry out each truncation height. Based on the analysis of three surveys in two years, results showed that there was no significant difference in background among four traits of tree height, ground diameter, crown width and steaming biomass. After treatment, the differences of four traits among different treatments were increased significantly, and all of them achieved very significant level. Multiple comparisons were also increased from 2 DUNNCAN groupings in the background to 3—4 groupings, and with the increase of truncation height, four trait indicators were gradually increased; the fewer retained branches, the four trait indicators were smaller. So the optimum processing combination was proposed that all branches of the trunk were retained after truncation at the height of 120 cm.