Dynamics of Maize Carbon Contribution to Soil Organic Carbon in Association with Soil Type and Fertility Level

Pei, Jiubo; Li, Hui; Li, Shuangyi; An, Tingting; Farmer, John G.; Fu, Suhua; Wang, Jingkuan

doi:10.1371/journal.pone.0120825

Cited by 19 publications

(4 citation statements)

References 21 publications

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“…We mainly attributed this to fast-growing populations, including phyla like Proteobacteria, Firmicutes, Actinomycetes, and Ascomycota, that can rapidly take advantage of the presence of degradable C compounds in the wheat straw and other C-rich environments 37 . Pascault et al 24 and Fan et al 25 also reported that these phyla were the dominant bacteria assimilating C derived from wheat or maize straws in the initial phase of straw decomposition. On the genus level, the relative abundance of the bacteria Streptomyce and Massilia, and the fungi Talaromyces and Fusarium, increased significantly during the initial phase of straw decomposition in our experiment.…”

Section: Discussionmentioning

confidence: 97%

Linking soil microbial community dynamics to straw-carbon distribution in soil organic carbon

Yao

Yang

et al. 2020

Sci Rep

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Returning crop residues is a possible practice for balancing soil carbon (c) loss. the turnover rate of organic c from crop residues to soil c is dependent on soil microbial community dynamics. However, the relationship between any temporal changes in the soil microbial community after crop straw inputs and the dynamics of straw-c distribution in the soil organic carbon (Soc) pool remains unclear. the present study investigated the allocation of straw-c into soil dissolved organic carbon (Doc), microbial biomass carbon (MBc), particulate organic carbon (poc) and mineral-associated organic carbon (Maoc) using stable isotope probing, as well as the temporal changes in the soil bacterial and fungal communities using high-throughput sequencing. After the first 180 days of straw decomposition, approximately 3.93% and 19.82% of straw-C was transformed into soil MaOC and POC, respectively, while 0.02% and 2.25% of straw-C was transformed into soil DOC and MBC, respectively. The temporal change of the soil microbial community was positively correlated with the dynamics of straw-c distribution to Soc (R > 0.5, P < 0.05). The copiotrophic bacteria (e.g., Streptomyces, Massilia and Sphingobacterium), cellulolytic bacteria and fungi (e.g., Dyella and Fusarium, Talaromyces), acidophilic bacteria (e.g., Edaphobacter and unclassified Acidobacteriaceae), denitrifying and N-fixing microbes (e.g., Burkholderia-Paraburkholderia, Paraphaeosphaeria and Bradyrhizobium), and fungi unclassified Sordariomycetes were significantly correlated with straw-C distribution to specific SOC fractions (P < 0.05), which explained more than 90% of the variation of straw-C allocation into soils. copiotrophic, certain cellulolytic and denitrifying microbes had positively correlated with Doc-and Maoc-derived from straw, and other cellulolytic fungi (e.g., Talaromyces) and specific bacteria (e.g. Bradyrhizobium) were positively correlated with poc-derived from straw. our results highlight that the temporal change of soil microbial community structure well reflects the conversion and distribution process of straw-c to Soc fractions. Soil organic matter, the largest terrestrial carbon (C) pool, plays an important role in improving soil fertility and sustaining soil productivity 1,2. Many agricultural management practices, such as fertilizer application, straw return, and tillage, could affect the soil organic carbon (SOC) pool 3-6 , especially the labile organic carbon fractions, such as dissolved organic carbon (DOC), microbial biomass carbon (MBC) and particulate organic carbon (POC). DOC and MBC, considered to be soil active organic C, have been reported as important factors in impacting soil fertility 7,8. Moreover, the formation, migration and transformation of DOC can affect soil microbial community structure and activity 9-11 , and the formation of mineral-associated organic carbon (MaOC) 12,13 , which usually represents the largest fraction of SOC pool 14. POC has been considered as a transition state of stable organic C, which is predominantly of...

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Section: Discussionmentioning

confidence: 97%

Linking soil microbial community dynamics to straw-carbon distribution in soil organic carbon

Yao

Yang

et al. 2020

Sci Rep

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“…Mineralization involves the breakdown of organic matter into simple inorganic compounds through microbial action, which is a crucial pathway for Soil Organic Carbon (SOC) loss ( Thuriès et al, 2001 ). Humification is a process that retains nutrients in the soil, and humus is the most stable component of soil organic matter ( Adam et al, 1985 ; Pei et al, 2015 ). The decomposition of cellulose in corn stover is a vital step in its degradation.…”

Section: Discussionmentioning

confidence: 99%

Effects of frequency and amount of stover mulching on the microbial community composition and structure in the endosphere and rhizosphere

Li,

Zou,

Song

et al. 2024

Front. Microbiol.

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Stover mulching, as a sustainable agricultural conservation practice, has been shown to effectively increase soil organic matter and enhance crop yields. The impact of stover mulching on soil microorganisms has been extensively studied. However, less attention has been given to endophytic and rhizospheric microorganisms that have closer relationships with crops. How do the quality and frequency of stover mulching affect the composition and structure of these endosphere and rhizosphere microbial communities? And what is their influence on critical indicators of soil health such as bacterial plant pathogen and Rhizobiales? These questions remain unresolved. Therefore, we investigated the responses of the microbial functional guilds in the endosphere and rhizosphere to maize stover mulching qualities (0%, 33%, 67%, and total stover mulching every year) and frequencies (once every 3 years and twice every 3 years) under 10-year no-till management. Results showed significant correlations between Bacillales and Rhizobiales orders and soil SOC, NO3−N, and NH4+N; Hypocreales and Eurotiales orders were significantly correlated with soil NO3−N, with the Aspergillus genus also showing a significant correlation with soil SOC. The frequency and quality of stover mulching had a significant effect on root and rhizospheric microbial communities, with the lowest relative abundance of bacterial plant pathogens and highest relative abundance of nitrogen-fixing bacteria such as Rhizobiales and Hypocreales observed under F1/3 and F2/3 conditions. The most complex structures in endosphere and rhizospheric microbial communities were found under Q33 and Q67 conditions, respectively. This research indicates that from a soil health perspective, low-frequency high-coverage stover mulching is beneficial for the composition of endosphere and rhizosphere microbial communities, while moderate coverage levels are conducive to more complex structures within these communities. This study holds significant ecological implications for agricultural production and crop protection.

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“…Full‐scale straw return conducted on an annual basis is also an important way to increase the soil carbon content (Zhao et al, 2015). Crop straw return is a major source of SOC and enhances the growth of soil microorganisms, soil microorganisms degrade straw and transforms some of the organic carbon into SOC, maintaining or increasing the level of soil organic matter and the total carbon reserve (Pei et al, 2015; Thuriès et al, 2001).…”

Section: Discussionmentioning

confidence: 99%

Duration of continuous cropping with straw return affects soil organic carbon

Zhang,

Chang

2023

Soil Use and Management

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Understanding the impact of continuous cropping with straw return on soil organic matter functional groups is of great importance for maintaining chemical stabilization of SOC in arid regions. Infrared spectral characteristics of cotton field soil with different continuous cropping durations (0, 5, 10, 15 and 20 years) were determined with Fourier-transform infrared spectroscopy for fields in Manasi River Basin, Xinjiang province, China. The effects of continuous cropping duration on the stability and chemical composition of soil organic carbon (SOC) were analysed. The results indicate an initial increase in the SOC, soil particulate organic carbon (POC), and mineral-associated organic carbon (MOC) content of soil under continuous cropping with straw return. However, as continuous cropping duration increased, the levels of SOC, POC, and MOC in soil began to decrease. The soil POC content and POC/MOC were highest after 5 years of straw return, and started to decrease as the continuous cropping duration increased.The SOC and MOC contents were highest after 10 years of continuous cropping, and were 3.30 and 1.84 times higher than the control, respectively. As continuous cropping duration increased, the relative peak intensities for polysaccharides and aromatic groups in soil organic matter decreased, while the relative peak intensities for aliphatic compounds and hydroxyketone increased. In conclusion, continuous cropping with straw return in cotton fields promotes SOC but only for about 10 years. An increase in straw return duration boosts the degree of esterification in soil organic matter. Moreover, enhanced protection by mineral binding was observed for soil organic matter, increasing organic matter stabilization. This study aimed to provide an empirical foundation for the management of the SOC pool and the establishment of rational straw return practices for cotton fields in arid areas.

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Dynamics of Maize Carbon Contribution to Soil Organic Carbon in Association with Soil Type and Fertility Level

Cited by 19 publications

References 21 publications

Linking soil microbial community dynamics to straw-carbon distribution in soil organic carbon

Linking soil microbial community dynamics to straw-carbon distribution in soil organic carbon

Effects of frequency and amount of stover mulching on the microbial community composition and structure in the endosphere and rhizosphere

Duration of continuous cropping with straw return affects soil organic carbon

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