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生物质炭与化肥氮配施对植烟土壤微生物功能多样性的影响
葛少华,阎海涛,陈 奇,彭桂新,于建春,杨永锋,刘国顺
1.河南农业大学 烟草行业烟草栽培重点实验室;2.河南中烟工业有限责任公司
摘要:
采用盆栽试验研究了生物质炭配施不同用量化肥氮对烤烟根区土壤微生物群落功能多样性的影响。研究结果显示,添加生物质炭提高了土壤有机碳和微生物生物量碳含量;减少15% 化肥氮配施生物质炭处理(T3)显著提高了土壤过氧化氢酶活性,提升了土壤新陈代谢水平。不同处理土壤微生物的碳源利用率不同,以T3处理的AWCD(平均颜色变化率)值最高,且微生物丰富度和优势度均为较高水平。主成分和热图分析表明,不同处理微生物功能差异性和优势碳源不同,其中T3处理的微生物群落功能差异性较小,优势碳源羧酸类中包含的碳源种最多。添加生物质炭可提高烟株根冠比23.06% ~ 42.36%。因此,添加生物质炭可增强植烟土壤微生物活性,提高土壤微生物功能多样性,以减少15% 化肥氮配施生物质炭效果最好。
关键词:  生物质炭  化肥氮  植烟土壤  微生物多样性
DOI:10.13758/j.cnki.tr.2019.04.011
分类号:S572
基金项目:烟草栽培重点实验室项目(110201101001TS-1)和河南中烟工业有限责任公司项目(ZW2014005)资助。
Effects of Biochar Combing with Nitrogen Fertilizer on Functional Diversity of Microbial Communities in Tobacco-planting Soil
GE Shaohua1,2, YAN Haitao1, CHEN Qi1, PENG Guixin3, YU Jianchun3, YANG Yongfeng3, LIU Guoshun1
1.National Tobacco Physiology & Biochemistry Research Centre,Henan Agricultural University;2.Henan China Tobacco Henan Industrial Co,Ltd,Zhengzhou ,Henan;3.China Tobacco Henan Industrial Co.,Ltd
Abstract:
A pot experiment was conducted to study the effects of biochar combined with different dosages of nitrogen fertilizer on the functional diversity of soil microbial community in flue-cured tobacco rhizosphere. The results showed that biochar application increased the contents of soil organic carbon and microbial biomass carbon, and the treatment of biochar with 15% reduction of nitrogen fertilizer (T3) significantly improved soil catalase activity and metabolism level. Carbon source utilization of soil microorganism were different under different treatments, T3 treatment had the highest average well color development (AWCD) value, and smaller soil microbial richness and dominance. Principle component analysis and thermal graph analysis showed that the functional differences and dominant carbon sources of soil microbial communities were different under different treatments, among of which, T3 treatment had smaller functional difference and contained most carbon sources in the dominant carbon source carboxylic acids. The biochar application improved root-crown ratio of tobacco by 23.06%–42.36%. Therefore, biocar application can enhance the microbial activity of tobacco-planting soil and improve the diversity of soil microbial function, and the biochar combing with 15% reduction of nitrogen fertilizer has the best effect.
Key words:  Biochar  Nitrogen fertilizer  Tobacco-planting soil  Microbial diversity

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