生物炭对土壤微生物C源代谢活性的影响

发布时间：2018-09-09 14:37

【摘要】：为了探究外源生物炭输入量对根际、非根际土壤微生物功能多样性的影响,通过田间试验,采用Biolog-ECO检测法,分析了不同量生物炭输入下,根际、非根际土壤微生物C源代谢的平均颜色变化率(AWCD)、丰富度指数、Shannon-Winner指数、均匀度指数、Simpson指数等指标的变化.结果表明:外源生物炭的输入提高了根际土壤微生物的C源代谢活性,当输入量340t/hm~2时,达到显著水平;对非根际土壤微生物的C源代谢活性没有显著影响.同时,对根际、非根际土壤微生物的丰富度指数、Shannon-Wiener指数、均匀度指数均没有显著影响.外源生物炭的输入提高了根际土壤微生物对糖类、氨基酸类、羧酸类C源的利用能力;对非根际土壤微生物利用C源的能力无显著影响;有机碳是影响微生物C源代谢活性的主要因素,40t/hm~2生物炭是供试土壤适宜的输入量.
[Abstract]:In order to investigate the effect of exogenous biochar input on microbial functional diversity in rhizosphere and non-rhizosphere soil, the effects of different biochar inputs on the rhizosphere were analyzed by field experiments and Biolog-ECO detection. (AWCD), richness index Shannon-Winner index, evenness index and Simpson index. The results showed that exogenous biochar increased the C source metabolic activity of rhizosphere microbes and reached a significant level when the input amount was 340 t / hm ~ 2, but had no significant effect on the C source metabolic activity of non-rhizosphere soil microorganisms. At the same time, there was no significant effect on Shannon-Wiener index and evenness index of microorganism in rhizosphere and non-rhizosphere soil. The introduction of exogenous biochar improved the utilization ability of rhizosphere microbes to carboxylic acid, carboxylic acid C source, but had no significant effect on non-rhizosphere soil microbial utilization of C source. Organic carbon is the main factor affecting the metabolic activity of microbial C source.
【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;
【基金】：杨凌示范区科技计划项目(2015SF-03) 西北农林科技大学“大学生创新性实验计划”项目(2201610712021)
【分类号】：X172

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