高湿山地板栗最佳树形的选择

于1999～2006年对辽东山地板栗最佳树形进行了比较试验,选择出高湿山地板栗的最佳树形。结果表明,三种树形的产量开始以疏散分层形为最高,其次为自然开心形,且早期产量相差较大。当弓形树形完成后,产量差异开始减小。随着树龄的增加弓形树产量增加极为明显。高湿山地板栗最佳经济树形以二叉形的改良形——弓形为好。主干与改良中心干呈30～45°夹角,且中心干倾向于山坡上方。这种树形较传统的自然开心形与疏散分层形每生产100 kg板栗可节约修剪投资42.9%和26.3%,而且产量稳定。

Choices of the Optimum Tree Shape of Chestnuts in High and Wet Mountainous Region

Investigation and comparative experiments showed that the optimum economic tree shape of chestnuts in high and wet mountanious region was the bow shape whose initial shape was double-forked and the angle between the trunk and improved center trunk was 30～45°,meanwhile,the trunk declined to the slope upside.This tree shape can save the investments of 42.9%and 26.3% per 100 kg chestnut production than that of natrual shape and scattered delamination shape,besides,the yield was quite atable.