Long term tillage, cover crop, and fertilization effects on microbial community structure, activity: Implications for soil quality

Mbuthia, Lilian Wanjiru; Acosta-Martínez, Verónica; DeBruyn, Jennifer M.; Schaeffer, Sean M.; Tyler, Donald D.; Odoi, Evah W; Mpheshea, Molefi; Walker, Forbes; Eash, Neal S.

doi:10.1016/j.soilbio.2015.06.016

Cited by 448 publications

(306 citation statements)

References 56 publications

Supporting

Mentioning

240

Contrasting

Unclassified

Order By: Relevance

“…Cover crops enhanced β-glucosaminidase activity, in agreement with the enzymatic increments attributed to an additional supply of biomass into the soil (Ekenler and Tabatabai, 2003;Mbuthia et al, 2015;Zhao et al, 2016). The positive relationship (r= 0.78*) between β-glucosaminidase activity and mycorrhizal colonization found for the third sampling date suggests that the higher values found for the barley treatment might also be related to AMF.…”

Section: Discussionsupporting

confidence: 73%

“…This extra N supply by the legume might be one of the explanations for the relatively low mycorrhizal activity in this treatment. Mycorrhizal colonization becomes less indispensable when the plant can easily obtain the necessary N (Mbuthia et al, 2015). In the presence of available nutrients, the plant, therefore, saves the high C cost required to maintain AMF.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Biological and other soil parameters response to winter cover crops in a mediterranean irrigated system

González¹

View full text Add to dashboard Cite

Section: Discussionsupporting

confidence: 73%

Section: Discussionmentioning

confidence: 99%

Biological and other soil parameters response to winter cover crops in a mediterranean irrigated system

González¹

View full text Add to dashboard Cite

“…Fungi increased relative to bacteria following prairie restoration, relative to a maize control [56]. Similarly, greater fungal representation was seen for microbes under reduced tillage [57]. Rotation provides aboveground diversity that stimulates microbial functional activity in soil [58].…”

Section: Discussionmentioning

confidence: 85%

Grasslands and Croplands Have Different Microbial Biomass Carbon Levels per Unit of Soil Organic Carbon

McGonigle

Turner

2017

Agriculture

View full text Add to dashboard Cite

Primarily using cropped systems, previous studies have reported a positive linear relationship between microbial biomass carbon (MBC) and soil organic carbon (SOC). We conducted a meta-analysis to explore this relationship separately for grasslands and croplands using available literature. Studies were limited to those using fumigation-extraction for MBC for field samples. Trials were noted separately where records were distinct in space or time. Grasslands were naturally occurring, restored, or seeded. Cropping systems were typical of the temperate zone. MBC had a positive linear response to increasing SOC that was significant in both grasslands (p < 0.001; r 2 = 0.76) and croplands (p < 0.001; r 2 = 0.48). However, MBC increased 2.5-fold more steeply per unit of increasing SOC for grassland soils, as compared to the corresponding response in cropland soils. Expressing MBC as a proportion of SOC across the regression overall, slopes corresponded to 2.7% for grasslands and 1.1% for croplands. The slope of the linear relationship for grasslands was significantly (p = 0.0013) steeper than for croplands. The difference between the two systems is possibly caused by a greater proportion of SOC in grasslands being active rather than passive, relative to that in croplands, with that active fraction promoting the formation of MBC.

show abstract

“…While carbon stock is declining under most croplands, many producers have successfully increased soil organic matter by changing disturbance practices and diversifying and increasing plant growth, leading to improved aggregation, water infiltration and holding capacity, and nutrient cycling (Acosta-Martínez et al 2014;Jin et al 2013;Lehman et al 2015;Mbuthia et al 2015;Lehman et al 2015). This reduces vulnerability of landscapes and agricultural systems to intensifying climatic variability.…”

Section: Adaptation Planning For Cropping Systemsmentioning

confidence: 99%

Vulnerability of Southern Plains agriculture to climate change

et al. 2017

View full text Add to dashboard Cite

Projections of greater interannual and intrannual climate variability, including increasing temperatures, longer and more intense drought periods, and more extreme precipitation events, present growing challenges for agricultural production in the Southern Plains of the USA. We assess agricultural vulnerabilities within this region to support identification and development of adaptation strategies at regional to local scales, where many management decisions are made. Exposure to the synergistic effects of warming, such as fewer and more intense precipitation events and greater overall weather variability, will uniquely affect rain-fed and irrigated cropping, high-value specialty crops, extensive and intensive livestock production, and forestry. Although the sensitivities of various agricultural sectors to climatic stressors can be difficult to identify at regional scales, we summarize that crops irrigated from the Ogallala aquifer possess a high sensitivity; rangeland beef cattle production a low sensitivity; and rain-fed crops, forestry, and specialty crops intermediate sensitivities. Numerous adaptation strategies have been identified, including drought contingency planning, increased soil health, improved forecasts and associated decision support tools, and implementation of policies and financial instruments for risk management. However, the extent to which these strategies are adopted is variable and influenced by both biophysical and socioeconomic considerations. Inadequate local-and regional-scale climate risk and resilience information suggests that climate vulnerability research and climate adaptation approaches need to include bottom-up approaches such as learning networks and peer-to-peer communication.

show abstract

Long term tillage, cover crop, and fertilization effects on microbial community structure, activity: Implications for soil quality

Cited by 448 publications

References 56 publications

Biological and other soil parameters response to winter cover crops in a mediterranean irrigated system

Biological and other soil parameters response to winter cover crops in a mediterranean irrigated system

Grasslands and Croplands Have Different Microbial Biomass Carbon Levels per Unit of Soil Organic Carbon

Vulnerability of Southern Plains agriculture to climate change

Contact Info

Product

Resources

About