桉纯林与桉和大叶相思混交林比较研究

Comparative Research on Eucalyptus robusta Smith Pure Stand and the Mixed Forest of Eucalyptus robusta Smith and Acacia confuse Merr.

摘要:

摘 要：笔者通过对比桉纯林与桉、相思树混交育林对地力、林木生长量、生物存量的影响，进行了桉与固氮树混交的试验对比研究，结果表明：桉与大叶相思树混交造林，对林分土壤表层的养分具有一定的补给作用，也加速了速效钾的生成，但对林分土壤中速效磷的影响不明显。在有机物含量上，如果林分凋落物能够保留，则土壤中的有机物会保持一定量的增长，保证林木生长的需要。桉与相思树混交造林可以提高土壤肥力，防止大面积桉纯林造林引起的地力衰退现象。

Abstract:

Abstract: the author compared Eucalyptus robusta Smith pure stand with the mixed forest of Eucalyptus robusta Smith stand and Acacia confuse Merr., to effect productive power of soil, forest growth, living stock. The results showed that the mixed way supplied nutrient for soil surface of stand, also accelerated the rapidly available potassium products, but no significant effect on rapidly available phosphorus. On the organic content, if we can retain litter falls, the soil organic matter will keep growing, and ensure the needs of forest growth. The mixed way can improve fertility, prevent Eucalyptus robusta Smith pure stand from degeneration.