Responses of soil organic carbon decomposition and microbial community to the addition of plant residues with different C:N ratio

Liang, Xiao; Yuan, Jun; Yang, E; Meng, Jun

doi:10.1016/j.ejsobi.2017.08.005

Cited by 67 publications

(34 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…These high C/N ratio residues may also lead to greater CO 2 fluxes due to microbial mining for N (Kuzyakov, 2010). Related to CC termination date, the influx of a large quantity of fresh residues such as through late termination may “prime” or stimulate microbial activity, leading to large initial flushes of CO 2 and increased N 2 O losses compared with lower residue inputs, such as through early termination (Mitchell et al, 2016; Liang et al, 2017). Cover crops are also known to reduce soil NO 3 concentrations (Blanco‐Canqui et al, 2015), an input into denitrification; thus, CCs, particularly plants with larger root systems such as those terminated late, may reduce water content and NO 3 concentrations (Krueger et al, 2011), leading to overall reductions in N 2 O fluxes.…”

Section: Discussionmentioning

confidence: 99%

Impacts of Early‐ and Late‐Terminated Cover Crops on Gas Fluxes

et al. 2018

View full text Add to dashboard Cite

Cover crops (CCs) could alter soil processes, but the effects of early versus late termination of CCs on gas fluxes are not well known. We evaluated temporal changes in fluxes of CO2, N2O, and CH4 and related soil properties in no‐till corn (Zea mays L.) with and without winter rye (Secale cereale L.) CCs that were terminated early (30 d before planting) or late (at planting) in a rainfed silty clay loam and an irrigated silt loam in Nebraska from April 2016 to June 2017. Gas fluxes, soil temperature, and soil water content were measured biweekly to monthly, and wet aggregate stability and particulate organic matter concentrations were measured seasonally. We also compared our results with a global literature review. Late‐terminated CCs did not affect CH4 fluxes but increased daily CO2 fluxes by 59% compared with no CC at both sites and N2O fluxes by 92% at the rainfed site only. Early termination did not affect gas fluxes. Termination date did not affect cumulative fluxes and had minimal effects on soil properties. The literature review supports our study results, which indicate that CC effects on (i) CO2 fluxes are driven by plant respiration during the CC growing period, and (ii) N2O and CH4 fluxes are minimal under grass CCs. Overall, under no‐till, CC termination date has small effects on N2O and CH4 fluxes, but late CC termination can increase CO2 fluxes in spring due to greater biomass yield compared with early termination. Core Ideas Early‐terminated cover crops had limited effects on CO2 fluxes in this study. Late‐terminated cover crops increased CO2 flux mainly in spring due to higher cover crop biomass yield. Cover crop termination effects on N2O and CH4 fluxes were generally nonsignificant. Our literature review showed cover crops affected CO2 mostly during their growing period. Our literature results also showed grass cover crops had limited effects on N2O.

show abstract

Section: Discussionmentioning

confidence: 99%

Impacts of Early‐ and Late‐Terminated Cover Crops on Gas Fluxes

et al. 2018

View full text Add to dashboard Cite

show abstract

“…La producción de CO 2 en el suelo con AVR y AVE fue 1.23 y 1.21 veces más, en comparación con la enmienda de AVM (Cuadro 3); esto es debido al mayor contenido de celulosa y hemicelulosa, y la más alta relación C:N en AVM (Cuadro 2). Liang et al (2017) reportaron resultados similares cuando adicionaron residuos de maíz con relación C:N de 27.6 y la producción de CO 2 fue la más baja comparada con relaciones C:N de 16.9 y 10.3 en el mismo tipo de residuo. Debido al mayor contenido de nitrógeno (3%) y la baja relación de C:N (14 y 12, respectivamente) presente en los residuos de AVE y AVR, son considerados de mejor calidad (Chaves et al, 2004;Gentile et al, 2009); por ello, se obtuvo un incremento en la respiración microbiana del 19.2 y 17.9% (AVE y AVR, respectivamente) con relación a la producción de CO 2 del AVM; los resultados coinciden con los obtenidos por Liang et al (2017), quienes aplicaron al suelo residuos de maíz con tres relaciones de C:N (27.6, 16.9 y 10.3) y la producción de CO 2 fue mayor en el tratamiento con la relación C:N más baja (10.3) y signif icativamente diferente al tratamiento con la relación C:N de 16.9 y 27.6, en 8.7 y 28.3%, respectivamente.…”

Section: Resultados Y Discusión Actividad Microbiana Del Suelounclassified

“…Liang et al (2017) reportaron resultados similares cuando adicionaron residuos de maíz con relación C:N de 27.6 y la producción de CO 2 fue la más baja comparada con relaciones C:N de 16.9 y 10.3 en el mismo tipo de residuo. Debido al mayor contenido de nitrógeno (3%) y la baja relación de C:N (14 y 12, respectivamente) presente en los residuos de AVE y AVR, son considerados de mejor calidad (Chaves et al, 2004;Gentile et al, 2009); por ello, se obtuvo un incremento en la respiración microbiana del 19.2 y 17.9% (AVE y AVR, respectivamente) con relación a la producción de CO 2 del AVM; los resultados coinciden con los obtenidos por Liang et al (2017), quienes aplicaron al suelo residuos de maíz con tres relaciones de C:N (27.6, 16.9 y 10.3) y la producción de CO 2 fue mayor en el tratamiento con la relación C:N más baja (10.3) y signif icativamente diferente al tratamiento con la relación C:N de 16.9 y 27.6, en 8.7 y 28.3%, respectivamente. El nuevo sustrato (enmienda) no solo provee de una fuente lábil de C y de energía, también abastece de una fuente de nitrógeno necesario para las comunidades microbianas, la cual es utilizada para promover su crecimiento (Sakala et al, 2000;Bird et al, 2001).…”

Section: Resultados Y Discusión Actividad Microbiana Del Suelounclassified

¿La incorporación de residuos de diferentes especies de Lupinus, como abono verde, afecta la actividad microbiana del suelo?

Hernández

Nátera

Trujillo-Tapia³

et al. 2020

Terra

View full text Add to dashboard Cite

In the state of Jalisco, corn and tequila agave are the most important agricultural crops. The soils to cultivate these species are characterized by low content of organic matter and nitrogen. The amendments applied to the soil provide an important source of energy and nutrients for microorganisms; promotes the diversity of nitrogen-f ixing bacteria and nitrifying bacteria, which increases nitrogen availability in the soil. The aim of this study was to evaluate the use of two species of wild legumes: Lupinus exaltatus and Lupinus rotundiflorus as green manure (AV), and its effect on soil microbial biomass. An aerobic incubation experiment (14 days) was carried out on soil samples with green manure and without green manure (control). Under laboratory conditions, the microbial activity of soil was monitored through the response in basal respiration and the concentration of C and N in the microbial biomass. The CO2 production and C and N content in the microbial biomass showed significant differences (P < 0.05) due to the effect of green manure. The residues of Lupinus are considered better quality than the residues of Zea mays due to its nitrogen content and low C: N ratio. The response of microorganisms presented a positive primer effect with the input of AV. Therefore, we conclude that the input of L. exaltatus and L. rotundiflorus as a green manure to the soil increases the biological activity of the soil and promotes the enrichment of C and N of the microbial biomass.

show abstract

“…The suitable straw amount provides sufficient C for soil microbes to grow and reproduce, further stimulating soil microbial growth and enzyme activity (Zhao et al ., 2016). However, an excessive amount of straw results in a direct increase in C : N ratios (Said-Pullicino et al ., 2014), which affects the composition and structure of the soil microbial community (Liang et al ., 2017). The effects of organic amendments on the microbial activity are influenced by the composition of the organic amendment, particularly the C : N ratio (Heal et al ., 1997).…”

Section: Discussionmentioning

confidence: 99%

Evaluation of optimal straw incorporation characteristics based on quadratic orthogonal rotation combination design

et al. 2018

View full text Add to dashboard Cite

For straw incorporation, three crucial factors affect the soil microbial community and various enzyme activities: straw length, amount and burial depth. To analyse the individual and interactive effects of these three factors on the soil microbial community and various enzyme activities, 23 treatments with five levels of the three variables (straw length, amount and burial depth) were applied in a quadratic orthogonal rotation combination design. A comprehensive indicator was constructed that could represent soil microbial functional diversity and enzyme activity by determining the weights of measured indicators and using Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS). The results indicated that the soil microbiological indicators have a higher criteria weight than soil enzyme activity indicators. The final weight orders of indicators were as follows: Shannon–Weaver > invertase > Shannon evenness > urease > catalase > McIntosh index > Simpson diversity > phosphatase. The soil comprehensive values constructed by the TOPSIS method are reliable. The optimal combination for the improvement of soil microbial functional diversity and enzyme activity was a straw length of 13–24 cm, burial depth of 10–17 cm and straw amount of 370–650 g/m2.

show abstract

Responses of soil organic carbon decomposition and microbial community to the addition of plant residues with different C:N ratio

Cited by 67 publications

References 39 publications

Impacts of Early‐ and Late‐Terminated Cover Crops on Gas Fluxes

Impacts of Early‐ and Late‐Terminated Cover Crops on Gas Fluxes

¿La incorporación de residuos de diferentes especies de Lupinus, como abono verde, afecta la actividad microbiana del suelo?

Evaluation of optimal straw incorporation characteristics based on quadratic orthogonal rotation combination design

Contact Info

Product

Resources

About