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在长期肥和未肥的田中生物固,特别是对二氧化铁减少细菌

Yoko Masuda¹, Sakura Satoh¹, Ryota Miyamoto¹

¹Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-City, Tokyo, 113-8657, Japan.

Archives of microbiology

|July 20, 2023

概括

长期的化肥并没有影响土壤固活性或在田中减少铁的细菌的占主导地位. 这些细菌的生物固定 (BNF) 维持了土壤的肥力和大米产量.

科学领域:

农业科学农业科学
微生物学微生物学
土壤科学土壤科学

背景情况:

生物固定 (BNF) 对于保持田土壤肥沃度和大米产量至关重要.
肥可以影响BNF,需要了解其对土壤生态系统的影响.
减少铁的细菌,Anaeromyxobacter和Geobacter,是新发现的在米土壤中占主导地位的食菌.

研究的目的:

调查化肥和不施肥对与BNF相关的土壤属性的长期影响.
评估对二氧化铁减少细菌种群及其固活性的影响.
在不同的管理制度下,确定BNF对土壤肥和大米产量的贡献.

主要方法:

在长期受精和未受精的水地块之间比较土壤特性,固定活性和二氧化菌群体组成.
鉴定性菌的数量,重点是Anaeromyxobacter和Geobacter,并分析它们的nifD基因表达.
测量土壤的化学/生物化学性质和土壤整体固活性.

主要成果:

长期化或不化对土壤属性,固定活性或二变性细菌群体组成没有显著影响.
在受精和未受精的土壤中,Anaeromyxobacter和Geobacter是占主导地位的阴性菌,具有相似的nifD转录水平.
在这两种土壤类型中,检测到非常低的水平或低于检测极限的其他一般性透析菌.

结论:

长期的管理实践并没有改变这种田中二氧化铁减少细菌的主导地位或固定潜力.
主要由这些细菌驱动的BNF,无论长期化如何,都对维持土壤肥和大米产量做出了重大贡献.
通过适当的土壤管理来维持BNF对于可持续的农业和大米生产至关重要.

关键词:

减少铁的细菌减少铁的细菌长期的实地实验长期的实地实验化肥的受精方式固定的方法是固定.这里是大米土壤.

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