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气候对旱地紫色土微生物功能多样性的长期影响

期刊名称：土壤, 2009(02),230-235.
时间：0
分类：S154.36[农业科学—土壤学;农业科学—农业基础科学]
作者机构：[1]中国科学院南京土壤研究所,南京210008
相关基金：中国科学院知识创新工程重要方向项目（KZCX2-YW-407）和国家自然科学基金重大项目（30590381）资助.
相关项目：我国主要陆地生态系统对全球变化的响应和适应性样带研究

关键词：土壤置换试验, 紫色土微生物多样性, 中亚热带, 暖温带, Soil reciprocal transplantation experiment, Purple soil, Microbial diversity, Middle subtropical zone, Warm temperate zone

中文摘要：

研究了暖温带和中亚热带气候对紫色士的理化性质、微生物活性及其多样性的长期影响。将安徽休宁的紫色土分别放置在暖温带的封丘和中亚热带的鹰潭，18年的旱作定位试验结果表明，中亚热带紫色土的pH、全N含量、NO3^--N含量和有效P含量显著低于暖温带紫色土；中亚热带气候条件下紫色土微生物整体活性高于暖温带；中亚热带气候条件下紫色土微生物对羧酸和糖类利用较多，而在暖温带气候条件下紫色土微生物对氮基酸和胺类的利用能力较高。说明中亚热带气候条件促进了紫色土微生物对含C化合物的利用，而暖温带气候条件促进了紫色土微生物对含N化合物的利用。

英文摘要：

Soil microbial structure composition can influence soil ecological function, it is very important to know the diversity of the microbial community in different environments. We examined the spatial patterns of soil physical and chemical properties, soil microbial activity and diversity and C sources used by soil microbe at two regions, i.e.,Fengqiu and Yingtan, which represent the warm temperate and semi-humid monsoon climate and the mid-subtropical humid monsoon climate respectively. Soil pH, contents of total N, NO3-N and available P under the mid-subtropical climatic condition were significantly lower than under the warm temperate climatic condition, but soil microbial activity under the mid-subtropical climatic condition were higher under the warm temperate climatic condition. Soil microorganism used more carboxylic acid and carbohydrates under the mid-subtropical climatic condition, but used more amino acid and amines under the warm temperate climatic condition. In a word, soil microorganism utilized compound containing carbon under the mid-subtropical climatic condition but utilized compound containing nitrogen under the warm temperate climatic condition.