秦岭典型林分夏秋两季根际与非根际土壤微生物群落结构

发布时间：2018-05-16 00:26

本文选题：土壤微生物 + 秦岭　；参考：《生态学报》2017年05期

【摘要】：本试验主要以秦岭山脉锐齿栎(Quercus aliena var.acutidentata)、油松(Pinus tabuliformis)、华山松(Pinus armandii)、云杉(Picea asperata)4种典型林分为对象,利用BIOLOG微孔板法研究4种林分夏、秋两季根际与非根际土壤微生物群落代谢多样性。研究表明:(1)夏、秋季土壤根际与非根际的平均颜色变化率(AWCD)值截然不同,除秋季云杉外,其余处理均表现为非根际根际,且AWCD明显受到季节的影响。(2)夏秋两季4种林分根际与非根际土壤微生物功能多样性之间差异显著,其中锐齿栎林夏秋两季均表现为根际小于非根际,而其它3种针叶林则是夏季根际小于非根际,秋季根际大于非根际;锐齿栎林根际与非根际均为秋季低于夏季,其他3种针叶林则是非根际土秋季低于夏季,而根际土秋季高于夏季。(3)主成分分析显示各土壤微生物功能多样性具有显著差异,且4种林分夏秋两季根际与非根际主成分综合得分也有所不同,4种林分非根际土综合得分锐齿栎最高,其次是华山松和云杉,油松最低;根际土夏秋规律不同,夏季华山松和油松较高,云杉最低,秋季油松和云杉较高,锐齿栎最低,且综合得分与多样性指数达到显著或极显著的正相关。(4)冗余分析表明土壤理化性质的综合作用对土壤微生物群落功能多样性有显著影响。
[Abstract]:In this experiment, the typical stands of Quercus aliena var. acutidentataer, Pinus tabuliformis, Pinus armandiiana and Picea asperata)4 in Qinling Mountains were divided into four typical stands. The metabolic diversity of microbial communities in the rhizosphere and non-rhizosphere soil of four stands in summer, autumn and autumn were studied by BIOLOG microporous plate method. The results showed that the average color change rate and AWCD value of soil rhizosphere and non-rhizosphere were very different in summer and autumn, except for Picea spruce in autumn. AWCD was significantly influenced by seasons. (2) there were significant differences in microbial functional diversity between rhizosphere and non-rhizosphere soil in summer and autumn, among which the rhizosphere was smaller than that in non-rhizosphere in sharp oak forest in summer and autumn. The other three coniferous forests were less than non-rhizosphere in summer and larger than non-rhizosphere in autumn, the rhizosphere and non-rhizosphere of acerbic oak forest were lower in autumn than in summer, and the other three coniferous forests were lower in autumn than in summer in non-rhizosphere soil. However, the principal component analysis of rhizosphere soil in autumn was higher than that in summer. The comprehensive scores of rhizosphere and non-rhizosphere principal components of four stands in summer and autumn were also different. The comprehensive scores of Quercus acutata in non-rhizosphere soil were the highest, followed by Pinus huashanensis and Picea spruce, the lowest was Pinus tabulaeformis, and the regularity of summer and autumn of rhizosphere soil was different. In summer, Pinus huashanensis and Pinus tabulaeformis were higher, spruce was the lowest, Pinus tabulaeformis and spruce were higher in autumn, Quercus acuminata was the lowest The redundancy analysis showed that the comprehensive effects of soil physical and chemical properties had a significant effect on the functional diversity of soil microbial communities.
【作者单位】：西北农林科技大学资源环境学院农业部西北植物营养与农业环境重点实验室;金正大生态工程集团股份有限公司养分资源高效开发与综合利用国家重点实验室;
【基金】：国家林业公益性行业科研专项(201304307) 国家自然科学基金项目(41571245) 西北农林科技大学“基本科研业务费科研创新重点项目”(ZD2013012)
【分类号】：S714.3

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