沿黄土石山区几种针叶树造林生长情况研究

A Study on the Growth of Several Coniferous Trees Along the Loess and Stone Mountains

为筛选出适合沿黄土石山区的优良造林树种,在府谷县郝家寨村进行彰武松、班克松、长白落叶松、油松、侧柏等5个树种的造林试验,调查分析不同树种的存活率及相关生长情况。结果表明:除长白落叶松存活率极低外,其他树种的存活率均达到70%以上,坡中位置彰武松成活率最高(86.47%);株高数据中,彰武松>班克松>油松>侧柏;地径数据中,彰武松>油松>班克松>侧柏;新梢生长数据中,彰武松与班克松相近,均高于油松。无论存活率、株高还是地径,不同树种生长指标均为坡中位置的高于坡上位置。整体而言,彰武松在沿黄土石山区很适合栽植,班克松更适合在沿黄土石山区的坡中位置栽植,油松、侧柏生长也较好,不建议栽植长白落叶松。

In order to screen out the good tree species suitable for afforestation along the loess and stone mountainous areas, the afforestation tests of five tree species including Pinus densiflora var. zhangwuensis,Pinus bnksiana, Larix olgensis, Pinus tabuliformis, and Platycladus orientalis were carried out in Haojiazhai Village, Fugu County, and the survival rate and related growth of different tree species were investigated and analyzed. The results showed that the survival rate of other tree species was over 70%, except for the lowest survival rate of L. olgensis. The position of Pinus densiflora var. zhangwuensis in the middle of the slope was the highest(86.47%). The plant height data showed P. densiflora var. zhangwuensis>P.bnksiana>P. tabuliformis>P.orientalis.The ground diameter data showed P. densiflora var. zhangwuensis>P. tabuliformis>P.bnksiana>P.orientalis.The shoot growth data showed that P. densiflora var. zhangwuensis was similar to P.bnksiana, and both were higher than those of P. tabuliformis.Regardless of survival rate, plant height or ground diameter, the growth data of different tree species were higher in the mid-slope than in the up-slope. On the whole, P. densiflora var. zhangwuensis is very suitable for planting along the loess and rocky mountainous areas, and P.bnksiana is more suitable for planting in the middle of the slope along the loess and rocky mountainous areas. P. tabuliformis and P.orientalis grow well. However, L.olgensis is not recommended for planting.