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在不同种植年份的米-乌共同种植系统中土壤细菌群体的组成

Ren Wang^1,2, Weiwei Ma³, Dan Wu^1,2

¹College of Agronomy, Hunan Agricultural University, Changsha, 410128, China.

Scientific reports

|December 20, 2023

概括

与单一栽培大米相比,第九年的米共同种植农业显著增加了土壤营养和细菌多样性. 然而,这种综合系统也可能增加甲排放.

科学领域:

农业科学农业科学
土壤微生物学土壤微生物学
生态生态学生态生态学

背景情况:

综合的水养殖系统对于可持续农业至关重要.
米-乌共同种植系统是综合农业中独特的方法.
了解土壤细菌社区动态对于优化这些系统至关重要.

研究的目的:

调查长期米共同培养对土壤细菌群落的影响.
为了比较大米单一栽培和大米田之间的土壤营养水平和细菌组成.
确定影响这些系统中微生物丰富性的关键土壤因素.

主要方法:

利用Illumina MiSeq测序来分析土壤细菌社区的组成.
对比了四个田:一个单一栽培 (CK) 和三个不同种植年份的鱼田.
进行了冗余分析,以将土壤特性与微生物丰富度相关联.

主要成果:

与CCK相比,第九年的米田 (RT9) 显示土壤可用 (AN),可用 (AP) 和有机物 (OM) 的增加.
在不同农业系统中观察到细菌系 (如酸菌和蛋白菌) 的显著差异.
特定的细菌家族 (Methylomonadaceae,Methylococcaceae,Methylophilaceae) 在RT9中更为丰富,与OM正相关.

结论:

长期的米共同培养系统增强了土壤的肥力和细菌的多样性.
土壤AN和AP是主导微生物社区结构的关键驱动力.
虽然对土壤健康有好处,但米系统存在增加甲排放的潜在风险.

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