不同肥料种类与混交模式对南方 红豆杉幼林生长的影响

Effects of Different Fertilizer Types and Mixed Modes on the Growth of Taxus wallichiana var . mairei young Forest

摘要:

为扩大本地乡土珍贵树种南方红豆杉资源筛选出适宜的肥料种类,2009~2012年连续 4年对 3种不同肥料种类 南酸枣林下种植南方红豆杉的树高及地径生长量进行测定分析研究,并初步探讨了不同混交模式对南方红豆杉树高及地 径生长量的影响 。结果表明,不同肥料种类中南方红豆杉的生长以尿素复合肥混合施用效果最佳,4年的树高及地径生长 量分别增加 112. 58cm、2. 62cm,树高生长量与单施尿素、复合肥处理呈显著性差异,地径生长量无显著差异 。尿素复合肥 混施种植情况下,杉木×南方红豆杉比南酸枣×南方红豆杉更有利于树高的生长,且呈极显著差异;两种混交模式下南方 红豆杉的地径生长量差异不明显。

Abstract:

In order to expand the resources of local precious tree species Taxus wallichiana var . mairei, the growth of tree height and ground diameter of Taxus wallichiana var . mairei that planted under forest of choerospondias axillaris by 3 kinds of fertilizers were determined and analyzed from 2009to 2012for 4 consecutive years . And effects on the growth of tree height and ground diameter of Taxus wallichiana var . mairei under different mixed modes were preliminarily dis- cussed. Results showed that, the growth of Taxus wallichiana var . mairei fertilized with urea and compound fertilizer mix- ing was the best among different fertilizer types . And the growth of tree height and ground diameter increased by 112. 58 cm and 2. 62cm respectively in four years . And the growth of tree height was significantly different from single applica- tion of urea and compound fertilizer, but there were no significant differences in ground diameter among these 3 kinds of fertilizers . Fertilized with urea and compound fertilizer mixing, the height growth of Taxus wallichiana var . mairei×cun- ninghamia lanceolate was higher than Taxus wallichiana var . mairei×choerospondias axillaris , which was significantly different from Taxus wallichiana var . mairei×choerospondias axillaris . But there had no significant effects on the growth of ground diameter in both of two mixed modes .