定植方式以及坡向与坡位对女贞幼树生长的影响

Effects of fixed planting method,slope aspect and slope position on the growth of Ligustrum lucidum seedlings

以2年生女贞截干苗为造林用苗,采取正栽和斜栽2种定植方式进行造林,4个半月后调查2种定植方式下不同坡位和坡向女贞幼树的树高、地径、新梢数、新梢长、萌芽位高等,分析定植方式以及不同定植方式下坡向与坡位对女贞幼树生长的影响;同时,分析女贞幼树各生长指标的相关性。结果显示:定植方式对女贞幼树的新梢数和萌芽位高均有极显著影响,对其树高、地径、新梢长的影响均不显著。斜栽的女贞幼树新梢数极显著多于正栽的,其萌芽位高极显著低于正栽的。以正栽方式定植,坡向与坡位对女贞幼树的树高、地径、新梢长均有极显著影响,对其新梢数、萌芽位高的影响均不显著;相同坡位,南坡的女贞幼树树高与胸径均大于东坡的;相同的坡向,下坡较上坡更利于女贞幼树的树高和新梢生长;山顶平坡最利于其地径生长和分枝。以斜栽方式定植,坡向与坡位对女贞幼树树高、新梢数、新梢长、萌芽位高均有极显著影响,仅对其地径无显著影响;相同坡位,东坡的女贞幼树树高与胸径均大于北坡的;相同的坡向,下坡较上坡更利于女贞幼树的树高和新梢生长;东坡上坡和山顶平坡均利于女贞幼树分枝和萌芽位高的降低,且东坡上坡和山顶平坡的女贞幼树新梢数和萌芽位高的差异均不显著。在2种定植方式下,女贞幼树的新梢数与树高均呈极显著正相关,与地径呈显著或极显著正相关;新梢长与地径呈显著或极显著正相关;萌芽位高与树高均呈极显著正相关,与新梢数均呈极显著负相关,与地径和新梢长相关均不显著。

The 2-year-old privet cut-off seedlings of Ligustrum lucidum were used as for seedlings,and direct planting and oblique planting method were adopted.After four and a half months,the height,diameter,height of bud,number of shoots and shoot length of young privet trees were investigated to analyze the effects of planting mode,slope direction and slope position on the growth of young L.lucidum in same or different fixed planting method.Meanwhile,the correlation of growth indexes of young L.lucidum was also analyzed.The results showed that the fixed planting methods had extremely significant effects on the number of new shoots and the height of budding position,but had not significant effects on tree height,ground diameter,and the length of new shoots.The number of new shoots in oblique planting methodwas significantly higher than that indirect planting method,and thebudding position was significantly lower than that in direct planting method.Using direct planting method,slope aspect and slope position had extremely significant effects on tree height,ground diameter and new shoot length,but had notsignificanteffectson number ofnew shoot and height of budding position.In the same slope aspect,the tree height and gruound diameter of L.lucidum seedlings,which planted in the south slope are higher than those of the east slope.In the same slope position,the suphill eedlings planted in downhill is more conducive to tree height and new shoot growth than uphill;and the flat slope on the top of the hill was most conducive to ground diameter growth and branching.Using the oblique planting method,the slope aspect and slope position have extremelysignificant effectson the height,number of new shoots,length of new shoots,and the height of the budding position,but only the ground diameter had no significant effect.In the same slope position,the tree height and diameter at breast height of L.lucidum seedlings,which planted in the east slope are higher than those on the north slope.In the same slope aspect,the seedlings planted in downhill is more conducive to tree height and new shoot growth than uphill;uphilland in flat slope on the top of the hill are both conducive to branching and reducing budding position,and the difference between the twoslope aspects is not significant.Under the direct planting and oblique planting methods,the number of new shoots with tree height and ground diameter was significantly or extremely positively correlated,and the length of new shoots and ground diameter were both significantly or extremely significantly positively correlated.The budding position height was extremely significantly positively correlated with tree height,significant negative correlation with the number of new shoots,and there was no significant correlation with the ground diameter and length of new shoot.