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研究了秦岭火地塘林区油松、华山松、锐齿栎和华北落叶松４个树种根际微区土壤特性，结果表明：４个树种根际土壤的ｐＨ值均低于非根际土壤，其中华北落叶松影响最明显，ｐＨ值相差达１个单位，锐齿栎影响最小；有机质含量４个树种则均是根际土壤大于非根际土壤，锐齿栎根际土壤的有机质含量最高；全Ｎ、水解Ｎ和速效Ｋ含量，在根际出现一定程度的富积；速效Ｐ则在根际土壤明显产生亏缺；全Ｐ在根际土壤和非根际土壤之间的差异不明显；土壤微生物总量和３种土壤酶活性均为根际土壤高于非根际土壤，说明根系的生理代谢活动能明显增强根际土壤生物活性和物质转化速率。
The characteristics of rhizosphere micro-soil characteristics of Pinus tabulaeformis, Pinus armandii, Pinus densiflora and Larix principis-rupprechtii in the region of Huoditang in Qinling Mountains were studied. The results showed that the rhizospheric soil pH value of the four species was lower than that of non-rhizosphere soil , Among which the Larix principis-rupprechtii had the most obvious influence, the difference of pH values reached 1 unit, and the Quercus serrata had the least effect. The contents of organic matter in the rhizosphere soil were higher than those in the non-rhizosphere soil and the highest in the rhizosphere soil ; N, N and available K content in the rhizosphere of a certain degree of accumulation; available P in the rhizosphere soil significantly deficit; total P in the rhizosphere and non-rhizosphere soil was not significantly different ; Total amount of soil microorganisms and three kinds of soil enzyme activities were higher in rhizosphere soil than non-rhizosphere soil, indicating that physiological activities of rhizosphere soil can significantly enhance rhizosphere soil biological activity and material conversion rate.