湿地松厚荚相思混交林生长特性与生态效应研究

在较为贫瘠的迹地上开展湿地松与厚荚相思单行、带状混交及湿地松纯林造林对比试验 ,对 10年生试验林研究结果表明 :采用湿地松与厚荚相思带状混交 ,各个树种保存率高、生长量大 ,与湿地松纯林相比较 ,带状混交林中湿地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。湿地松与厚荚相思单行混交 ,湿地松受压严重 ,保存率、生长量低 ,应及时对厚荚相思进行适度修枝 ,增加林内透光度 ,促进湿地松生长。

STUDY ON GROWTH CHARACTER AND ECOLOGICAL EFFECT OF MIXED FOREST OF PINUS ELLIOTTII AND ACACIA CRASSICARPA

The planting experiment of line and belt mixed forest of Pinus elliottii and Acacia crassicarpa and Acacia crassicarpa and pure forestry of Pinus elliottii was carried out.The result about 10 year experiment showed that the preserved rate was high and the growth was fast of Pinus elliottii and Acacia crassicarpa after these two tree species were belt mixed.Compared with pure stand,Pinus elliottii in the 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 elliottii was line mixed with Acacia crassicarpa,it was seriously pressed and its preserved rate was low and the growth was slow.The branch of Acacia crassicarpa in line mixed stand should be cut to increase the growth of Pinus elliottii.