Soil microbial dynamics in maize-growing soil under different tillage and residue management systems

Context Plant bioactive compounds such as condensed tannins (CT) are seen as an alternative to rumen chemical modulators to mitigate rumen methanogenesis in livestock; however, the presence of CT in ruminant faeces also produces a series of changes in soil microbiomes. Little is known about these effects on soil nutrient dynamics. Therefore, whether CT affect the decomposition process of faecal organic matter, delaying it and consequently increasing soil carbon and nitrogen (N) sequestration, merits study. Aims Our study investigated the effects of a diet rich in CT on bovine faecal composition and on subsequent dynamics of a soil microbial population. Methods Faeces were analysed from cattle fed the following diets: control (no CT), 1.25% CT, 2.5% CT. In a greenhouse pot experiment over a period of 60 days, faeces from the three dietary treatments were applied to soil and the soil microbial populations were measured against a control with no faeces applied. Key results The presence of CT increased the excretion of faecal N and of neutral and acid detergent fibres and lignin, and the higher rate of CT reduced the rate of soil organic matter decomposition. Treatments with dietary CT resulted in greater total numbers of bacteria in the soil than in the no-faeces control and stimulated numbers of Actinobacteria, Proteobacteria (α-Proteobacteria) and Firmicutes. Conclusions The study showed that CT alter N recycling and other nutrient inputs in a soil–animal ecosystem by increasing faecal N inputs, delaying organic matter breakdown, and changing soil microbial dynamics. Implications The presence of CT in ruminant diets can be beneficial to the soil environment. Sustainable management practices should be encouraged by providing ruminants with feed including high-CT legumes in silvopastoral systems.

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Functional Diversity and Size of Soil Microbial Communities Induced by Different Land Management Systems

Communications in Soil Science and Plant Analysis ◽

10.1080/00103620600830104 ◽

2006 ◽

Vol 37 (15-20) ◽

pp. 2701-2711 ◽

Cited By ~ 5

Author(s):

Qiufang Xu ◽

Peikun Jiang

Keyword(s):

Microbial Communities ◽

Functional Diversity ◽

Land Management ◽

Soil Microbial Communities ◽

Management Systems ◽

Soil Microbial

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Soil Management Systems to Support Soil Microbial Biomass in Vineyards

Conservation Agriculture ◽

10.1007/978-94-017-1143-2_49 ◽

2003 ◽

pp. 401-405 ◽

Cited By ~ 1

Author(s):

S. Reuter ◽

R. Kubiak

Keyword(s):

Microbial Biomass ◽

Soil Microbial Biomass ◽

Soil Management ◽

Management Systems ◽

Soil Microbial

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Effects of tillage and residue management on soil microbial communities in North China

Plant Soil and Environment ◽

10.17221/416/2011-pse ◽

2012 ◽

Vol 58 (No. 1) ◽

pp. 28-33 ◽

Cited By ~ 30

Author(s):

J.J. Wang ◽

X.Y. Li ◽

A.N. Zhu ◽

X.K. Zhang ◽

H.W. Zhang ◽

...

Keyword(s):

Microbial Communities ◽

North China ◽

Microbial Biomass Carbon ◽

Soil Microbial Communities ◽

Conventional Tillage ◽

Residue Management ◽

No Tillage ◽

Biomass Carbon ◽

Total N ◽

Soil Microbial

The impacts of tillage system (conventional tillage and no-tillage) and residue management (0, 50, and 100%) on soil properties and soil microbial community structure were determined in the Fengqiu State Key Agro-Ecological Experimental Station, North China. The microbial community structure was investigated by phospholipid fatty acid (PLFA) profiles. The results showed that tillage had significant effects on soil properties and soil microbial communities. In no-tillage (NT), microbial biomass carbon (MBC), total N, microbial biomass carbon/soil organic carbon (MBC/SOC), total microbes, and arbuscular mycorrhiza fungi increased, while actinomycetes, G<sup>+</sup>/G<sup>–</sup> bacteria ratio and monounsaturated fatty acids/saturated fatty acids (MUFA/STFA) decreased, compared with those in conventional tillage (CT). Residue had a significant positive effect on C/N ratio and MUFA/STFA. Canonical correspondence analysis indicated that tillage explained 76.1%, and residue management explained 0.6% of the variations in soil microbial communities, respectively. Soil microbial communities were significantly correlated with MBC, total N, C/N ratio and MBC/SOC. Among the six treatments, NT with 100% residue application obviously improved soil microbiological properties, and could be a proper management practice in the Huang-Huai-Hai Plain of China.  

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Carbon fractions and soil fertility affected by tillage and sugarcane residue management an Xanthic Udult

Semina Ciências Agrárias ◽

10.5433/1679-0359.2017v38n5p2921 ◽

2017 ◽

Vol 38 (5) ◽

pp. 2921 ◽

Cited By ~ 2

Author(s):

Iara Maria Lopes ◽

Shirlei Almeida Assunção ◽

Ana Paula Pessim de Oliveira ◽

Lúcia Helena Cunha dos Anjos ◽

Marcos Gervasio Pereira ◽

...

Keyword(s):

Organic Matter ◽

Soil Fertility ◽

Management Practices ◽

Production Systems ◽

Conventional Tillage ◽

Residue Management ◽

Soil Tillage ◽

Management Systems ◽

Gradual Change ◽

Carbon Fractions

The gradual change in management practices in sugarcane (Saccharum spp.) production from burning straw to a green harvesting system, as well as the use of minimum soil tillage during field renovation, may affect soil fertility and soil organic matter (SOM) contents. The objectives of this work were to investigate the influence of sugar cane production systems on: (1) soil fertility parameters; (2) on physical carbon fractions; (3) and on humic substance fractions, in a long-term experiment, comparing two soil tillage and two residue management systems an Xanthic Udult, in the coastal tableland region of Espírito Santo State, Brazil. The treatments consisted of plots (conventional tillage (CT) or minimum tillage (MT)) and subplots (residue burned or unburned at harvesting), with five replicates The highest values of Ca2+ + Mg2+ and total organic carbon (TOC) were observed in the MT system in all soil layers, while high values of K+ were observed in the 0.1-0.2 m layer. The CT associated with the burned residue management negatively influenced the TOC values, especially in the 0.1-0.2 and 0.2-0.4 m layers. The carbon in the humin fraction and organic matter associated with minerals were significantly different among the tillage systems; the MT showed higher values than the CT. However, there were no significant differences between the sugarcane residue management treatments. Overall, fractioning the SOM allowed for a better understanding of tillage and residue management systems effects on the soil properties.

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