黔中喀斯特地区不同土层厚度生物学特性研究

发布时间：2018-03-03 01:04

本文选题：响应　切入点：土壤　出处：《西南林业大学学报(自然科学)》2017年04期 　论文类型：期刊论文

【摘要】：为了解喀斯特地区不同土层厚度下土壤的生物学特性,以贵阳市花溪区白云岩及石灰岩发育土壤为研究对象,通过野外采样和室内分析方法,分析土壤酶活性、微生物量。结果表明:随着土层厚度的减小,土壤中蔗糖酶、脲酶、磷酸酶、过氧化氢酶及多酚氧化酶活性有不同程度的降低,除过氧化氢酶外,薄土中土壤酶活性显著低于中土及厚土。土壤中细菌、真菌、放线菌数量随土层厚度的降低而减少,并且细菌数放线菌数真菌数,细菌在土壤微生物中占据了绝对的优势,在各土层中分别占88.13%、85.71%、87.36%、85.00%及77.78%。微生物量碳、氮、磷随土层厚度减少含量逐渐降低,微生物量氮在厚土中含量显著高于薄土及中土,其含量为3.48 mg/kg。微生物量磷/全磷最小,与微生物量碳/有机碳、微生物量氮/全氮比值相差10倍。
[Abstract]:In order to understand the biological characteristics of soils with different soil thickness in karst area, the soil enzyme activity was analyzed by field sampling and laboratory analysis with the development of dolomite and limestone in Huaxi District, Guiyang City. The results showed that the activities of sucrase, urease, phosphatase, catalase and polyphenol oxidase decreased with the decrease of soil layer thickness, except catalase. The number of bacteria, fungi and actinomycetes decreased with the decrease of soil thickness, and the number of bacteria, actinomycetes and fungi, bacteria occupied an absolute advantage in the soil microbes, the activity of soil enzyme in thin soil was significantly lower than that in medium soil and thick soil, and the number of bacteria, fungi and actinomycetes in soil decreased with the decrease of soil thickness. The content of microbial biomass carbon, nitrogen and phosphorus gradually decreased with the decrease of soil thickness, and the microbial biomass nitrogen content in thick soil was significantly higher than that in thin soil and medium soil, and the content of microbial biomass phosphorus / total phosphorus was 3.48 mg / kg. the content of microbial biomass carbon, nitrogen and phosphorus was 3.48 mg / kg 路kg / kg, respectively, in each soil layer, and 85.36% and 77.78%, respectively, in each soil layer, and the content of microbial biomass carbon, nitrogen and phosphorus gradually decreased with the decrease of soil thickness. The ratio of microbial biomass nitrogen to total nitrogen was 10 times higher than that of microbial biomass carbon / organic carbon.
【作者单位】：贵州民族大学化学与环境科学学院;湖南广播电视台;
【基金】：贵州省科技厅贵州民族大学联合基金(黔科合LH字[2014]7382号)资助
【分类号】：S154

【相似文献】