破坏山体植被对土壤理化性质影响的研究

以未造林荒草地为对照，对淄博四宝山破坏山体3种林分下的土壤物理性状、土壤含水量、 入渗能力、养分含量、pH值及电导率进行了测定。结果表明，刺槐林地的土壤物理性状及持水能 力最好，其次是刺槐黑松混交林、黑松林;无论雨季还是旱季，土壤水分含量表现为刺槐林>刺槐黑 松混交林>黑松林>荒草地。黑松林地的渗透速度最快，可达荒草地的3.4倍，刺槐黑松混交林、 刺槐林的渗透能力依次递减。荒草地的土壤养分含量均最低，电导率最大，混交林的全N、全P、全 K含量均最高;刺槐林的全N、全K含量高于黑松林，但全P含量则相反;电导率和有机质含量表 现均为:刺槐林>刺槐黑松混交林>黑松林>荒草地。

Effects of Hilly Vegetation Damage on the Soil Physical Chemical Properties

The soil physical characteristics，water content， infiltration capacity， nutrient contents， pH and electronic conductivity of three forest stands were investigated in Mount Sibao of Zibo comparing with the nonˉafforestation wild grassland. The results showed that the soil physical characteristics and water holdˉ ing capacity in the land of Robinia pseudoacacia forest were the best，next were the mixed stand of R. pseucdoacacia and Pinus thunbergii forest; Whether it was in dry or rainy seasons， the order of the soil water content was R. pseucdoacacia> mixed forest>P. thunbergii>wild grassland. The infiltration rate was P. thunbergii> mixed forest >R. pseudoacacia ， and P. thunbergii was the 3.4 times as fast as wild grassland，which had the lowest soil nutrient contents and highest conductivity.Total N，P， and those K contents were the largest in mixed forest; Total N and K contents in R. pseudoacacia were better than those P. thunbergii，but total P was the reverse; The order of conductivity and organic matter conˉ tent was R. pseudoacacia >mixed forest>P. thunbergii>wild grassland.