西樵山森林改造对林地土壤理化性质的影响

文章研究了西樵山森林改造对林地土壤理化性质(包括土壤物理性质、化学性质及微生物含量等)的影响。结果表明：森林改造后，林地枯落物增多，土壤容重、毛管持水量、总孔隙度及非毛管孔隙度等物理性状都得到了改良；林地土壤有机质含量增加，土壤全N、有效N及有效K等养分指标普遍比对照样地高；且随着造林时间延长，效果越来越显著。但林地土壤pH值、全P、全K及有效P等养分指标规律性不明显，土壤微生物含量差异不大，这可能与造林整地引起暂时的局部水土流失及林木生长年限尚短有关。

The Effect on Physics and Chemistry of Forest Soil After the Forest Tree Improvement in XiQiao Mountain

After the forest tree improvement in XiQiao Mountain, the physics and chemistry of forest soil which including physical property, chemical property and the microbial content have alterred. The studied results indicate that with the increase of litter amount in woodland, the physical charateristies such as soil volume weight, capillary moisture-holding capacit,total porosity and non-capillary porosity have been upgraded, the soil organic matter amout have increased as well, the nutritive index such as soil total nitrogen, soil available nitrogen, and soil available kalium are generally higher than that of the cross-referred sample-land, and the effect will be significantly enhanced with the prolonged plantation time. Comparatively, there are not apparent regularity of nutritive index for soil pH-value, total phosphorus, total kalium and available phosphorus, no noticeable differences in the content of soil microbe have been found as well, it may contribute to the short length of plantation and the partial temporary soil erosion caused by the soil preparation and afforestation.