马尾松大叶相思混交林生长及土壤肥力研究

STUDY ON GROWTH AND Soil FERTILITY OF MIXED FORESTRY OF Pinus Massoniana AND ACACIA AURICULAEFORMIS

在较为贫瘠的迹地上开展马尾松与大叶相思单行、带状混交及马尾松纯林造林对比试验,对10年生试验林研究结果表明,采用马尾松与大叶相思带状混交,各个树种保存率高、生长量大,与马尾松纯林相比较,带状混交林中马尾松生长状况表现出明显优势,混交林林内小气候条件适宜,土壤理化性质良好,改善土壤肥力效果明显。马尾松与大叶相思单行混交,马尾松受压严重,保存率、生长量低,应及时采取对大叶相思进行适度修枝,增加林内透光度,促进马尾松生长。

The plantation experiment between line、belt mixed forestry of Pinus Massoniana and Acacia auriculaeformis and pure forestry of Pinus Massoniana was carried out.The results about 10-year experiment stand showed that the preserved rate was high and the growth was fast of Pinus Massoniana and Acacia auriculaeformis after these two tree species were belt mixed.Compared with pure stand,Pinus elliottii in belt mixed stand grew much faster,the climatic condition in the mixed stand was suitable,the physical and chemical character of the soil were better,and the soil fertility was improved apparently.When Pinus Massoniana was line mixed with Acacia,it was seriously pressed and its preserved rate was low and the growth was slow,The branch of Acacia crassicarpa auriculaeformis in line mixed stand should be cut to increase the growth of Pinus Massoniana.