土壤调理剂对土壤养分含量及微生物功能多样性的影响

发布时间：2018-02-26 11:32

本文关键词： 土壤调理剂土壤养分土壤微生物功能多样性　出处：《中国农业科技导报》2017年05期 　论文类型：期刊论文

【摘要】：以湖南典型红土为供试土壤,以烤烟品种K326为材料,通过小区试验,探究了土壤调理剂对土壤养分含量及微生物功能多样性的影响。结果表明,土壤调理剂改变了土壤养分,土壤p H、有机质含量、速效钾含量、有效磷含量均显著提高,而碱解氮含量无显著性差异;适量添加土壤调理剂可显著提高土壤微生物平均吸光值,过量添加反而降低,土壤微生物平均吸光值高低依次为T2T1T3CK;添加0.2%土壤调理剂可以显著提高微生物功能多样性丰富度指数和均一性指数,较对照分别提高了5.1%、88.4%;主成分分析结果显示,添加土壤调理剂使土壤微生物群落对碳源的代谢特征产生了差异。综合而言,添加适量的土壤调理剂能增加土壤养分含量,提高土壤微生物群落功能多样性,以0.2%的添加量最佳。
[Abstract]:The effects of soil conditioning agents on soil nutrient content and microbial functional diversity were investigated by using flue-cured tobacco cultivar K326 as experimental soil and flue-cured tobacco variety K326 in Hunan province. The results showed that soil conditioning agent changed soil nutrient. Soil pH, organic matter content, available potassium content, available phosphorus content were significantly increased, but there was no significant difference in alkali hydrolyzed nitrogen content. The average light absorption value of soil microorganism was T _ 2T _ 1T _ 3CK, the enrichment index and uniformity index of microbial function diversity were significantly increased by adding 0.2% soil conditioner, and the results of principal component analysis showed that, compared with the control, the average absorbency value of soil microorganism increased by 5.1% and 88.4%, respectively. The metabolic characteristics of soil microbial communities on carbon sources were different by adding soil conditioning agents, which could increase the content of soil nutrients and improve the functional diversity of soil microbial communities. The best addition is 0.2%.
【作者单位】：湖南农业大学农学院;湖南杂交水稻研究中心;
【基金】：湖南省科技计划项目(2015NK3002)资助
【分类号】：S156.2

【相似文献】