摘要
为探讨不同针叶林下土壤微生物性质差异及其与养分的关系,采用实地调查与室内实验分析相结合,对位于高原湿地滇池西岸森林公园现存4种针叶林云南松、华山松+云南油杉混交、云南油杉、柏树的林下土壤养分和微生物数量进行了研究。结果表明:华山松+油杉混交林土壤具有较适宜的容重及孔隙状况,其土壤表层有机质、速效氮以及速效钾均大于其他纯林,在当地具有明显的优势,可以明显改善林地内土壤微生物状况和养分特征,提高林地肥力;4种针叶林土壤微生物数量差异显著,呈现出从混交林到纯林逐渐减少的趋势。在微生物区系组成中,细菌占绝对优势,放线菌次之,真菌最少,且均随着土层的加深而逐渐减少;放线菌与有机质、速效钾、速效磷和容重呈极显著正相关关系;细菌与有机质呈极显著正相关关系,同时与速效钾、速效磷呈正相关关系,但相关性不显著;真菌与各项养分因子均呈正相关关系。
The soil nutrient and microbes quantity of Pinus yunnanensis faranch, Pinus armandii 4- [（eteleeria evelyniana , Keteleeria evelyniana and Cupressus duclouxiana forests in forest park of the Dian Lake, Kunming were surveyed and analyzed to study microbes characteristics and the correlation between microbes quantity and soil nutrients in different coniferous forests. The results showed that the organic matter, quick-acting nitrogen and quick-acting potassium content in the soil surface layer of Pinus armandii 4- Keteleeria evelyniana forest was higher than the other three coniferous forests because the soil of Pinus armandii 4- Keteleeria evelyniana forest was of appropriate soil bulk weight and soil porosity, which can improve soil microbes status and nutrient obviously, there was significant difference in microbes quantity among the four coniferous forests and the soil microbes quantity in the mixed forest was higher than that in the pure forest, the bacterium quantity was of absolute advantage in soil microflora, followed by antinomycete and fungus, the quantity of three microbes in soil decreased with increase of soil depth, there were very significant positive correlations between antinomycete quantity and organic matter content, quick-acting K content, quick-acting P content, soil bulk weight, there was a very significant positive correlation between bacterium quantity and organic matter content, there were positive correlations between bacterium quantity and quick acting K content, quick-acting P content, and there were positive correlations between fungus quantity and soil bulk weight, total porosity, organic matter content, quick- acting N content, quick-acting P content, quick-acting K content.
出处
《贵州农业科学》
CAS
北大核心
2011年第5期91-95,共5页
Guizhou Agricultural Sciences
基金
国家自然科学基金"云南滇西北典型高原湿地退化规律与机理研究"(40971285)
关键词
针叶林
土壤微生物
土壤酶活性
相关性
coniferous forest
soil microbes
soil enzyme activity
correlation
