Strength of Microbes in Nutrient Cycling: A Key to Soil Health

Sahu, Nisha; Vasu, Duraisamy; Sahu, Asha; Lal, Narayan; Singh, Sanjeev Kumar

doi:10.1007/978-981-10-5589-8_4

Cited by 51 publications

(30 citation statements)

References 75 publications

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“…However, these attempts were based on the implicit assumption that microorganisms are unilaterally affected by soil parameters, crop residues or species identity/communities. Actually, microorganisms are also the main players in nutrient cycling, determining nutrient accumulation, and soil structure (Li et al, 2017; Sahu et al, 2017; Powell and Rillig, 2018). Indeed, the co-inertia analyses we performed aimed to disentangling the roles of microbial taxa in soil nutrient cycling and crop yield and to clarify how these roles vary accordingly to soil conditions.…”

Section: Discussionmentioning

confidence: 99%

Interaction Between Conservation Tillage and Nitrogen Fertilization Shapes Prokaryotic and Fungal Diversity at Different Soil Depths: Evidence From a 23-Year Field Experiment in the Mediterranean Area

et al. 2019

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Soil biodiversity accomplishes key roles in agro-ecosystem services consisting in preserving and enhancing soil fertility and nutrient cycling, crop productivity and environmental protection. Thus, the improvement of knowledge on the effect of conservation practices, related to tillage and N fertilization, on soil microbial communities is critical to better understand the role and function of microorganisms in regulating agro-ecosystems. In the Mediterranean area, vulnerable to climate change and suffering for management-induced losses of soil fertility, the impact of conservation practices on soil microbial communities is of special interest for building mitigation and adaptation strategies to climate change. A long-term experiment, originally designed to investigate the effect of tillage and N fertilization on crop yield and soil organic carbon, was utilized to understand the effect of these management practices on soil prokaryotic and fungal community diversity. The majority of prokaryotic and fungal taxa were common to all treatments at both soil depths, whereas few bacterial taxa (Cloacimonates, Spirochaetia and Berkelbacteria) and a larger number of fungal taxa (i.e., Coniphoraceae, Debaryomycetaceae, Geastraceae, Cordicypitaceae and Steccherinaceae) were unique to specific management practices. Soil prokaryotic and fungal structure was heavily influenced by the interaction of tillage and N fertilization: the prokaryotic community structure of the fertilized conventional tillage system was remarkably different respect to the unfertilized conservation and conventional systems in the surface layer. In addition, the effect of N fertilization in shaping the fungal community structure of the surface layer was higher under conservation tillage systems than under conventional tillage systems. Soil microbial community was shaped by soil depth irrespective of the effect of plowing and N addition. Finally, chemical and enzymatic parameters of soil and crop yields were significantly related to fungal community structure along the soil profile. The findings of this study gave new insights on the identification of management practices supporting and suppressing beneficial and detrimental taxa, respectively. This highlights the importance of managing soil microbial diversity through agro-ecological intensified systems in the Mediterranean area.

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Section: Discussionmentioning

confidence: 99%

Interaction Between Conservation Tillage and Nitrogen Fertilization Shapes Prokaryotic and Fungal Diversity at Different Soil Depths: Evidence From a 23-Year Field Experiment in the Mediterranean Area

et al. 2019

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“…While there is a relationship between SMC diversity and many ecosystem functions (Sahu et al. 2017), there is little evidence that plant communities and SMC are always tightly coupled (Van Nuland, Ware, Bailey, & Schweitzer, 2019). Even if SMC never recover to a reference state, it may not affect ecosystem recovery.…”

Section: Does Smc Diversity Indicate a Healthy Ecosystem?mentioning

confidence: 99%

Examining assumptions of soil microbial ecology in the monitoring of ecological restoration

Hart

Cross

D’Agui

et al. 2020

Ecol Sol and Evidence

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1. Global interest in building healthy soils combined with new DNA sequencing technologies has led to the generation of a vast amount of soil microbial community (SMC) data. 2. SMC analysis is being adopted widely for monitoring ecological restoration trajectories. However, despite the large and growing quantity of soil microbial data, it remains unclear how these data inform and best guide restoration practice. 3. Here, we examine assumptions around SMC as a tool for guiding ecosystem restoration and evaluate the effectiveness of using species inventories of SMC as a benchmark for restoration success. 4. We investigate other approaches of assessing soil health, and conclude that we can significantly enhance the utility of species inventory data for ecological restoration by complementing it with the use of non-molecular approaches.

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“…Thus, soil moisture conservation measures helped in enhancing soil fungal and bacterial population. In turn, it might have influenced the nutrient dynamics to enhance nutrient availability to trees and grasses (Sahu et al, ). Thus, soil moisture conservation measures have enhanced the root biomass also.…”

Section: Discussionmentioning

confidence: 99%

“…The declining trend of pasture production after 2014 might be due to (a) decrease in number of rainy days and total rainfall over the previous years, (b) reduction in S. seabrana and C. ciliaris population (damaged during fruit harvesting). The increased yield under staggered trenching is associated with improved soil moisture availability, suppression of weed growth, and a decrease in soil temperature (Ghosh & Tarai, 2007;Sahu, Vasu, Sahu, Lal, & Singh, 2017;Shukla, Pathak, Tiwari, & Vishal, 2000). As water content in soil is closely related to important biological activities and chemical reactions (Parlange, Cahill, Nielsen, Hopmans, & Wendroth, 1998), the higher water content in T1 has improved yield over control.…”

Section: Biomass Productionmentioning

confidence: 99%

Degraded land restoration ecological way through horti‐pasture systems and soil moisture conservation to sustain productive economic viability

Singh

Ghosh

et al. 2019

Land Degrad Dev

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Alternate land uses that restore ecological balance with economic viability are desirable. Alternate land uses, that is, horti‐pasture systems (HPSs) with Emblica officinalis and Psidium guajava trees and pasture (Cenchrus ciliaris + Stylosanthes seabrana), were introduced with different soil moisture conservation measures (staggered contour trenches [T1], continuous contour trenches [T2], stone mulch [T3], vegetative barriers [T4], and control [T5]) for reclamation of degraded land and to test their capacity to perform ecological functions and provide economic return to the farmers. After 10 years, T1 increased soil organic carbon by ~58% and 15% over control in Emblica‐ and Psidium‐based HPS, respectively. T1 stipulated fruit and pasture yield by ~45% and 90% and 32% and 22% over control plots, in those HPS, respectively; T1 also improved fodder and fruit quality. Changing climates significantly affected the fruit and pasture yield. Despite this, T1 assured a benefit–cost ratio of 3.78 and 4.23 in those HPSs, respectively. The sustainable yield index for fruit and pasture in T1 were approximately (a) 1.85 and 1.68 and (b) 1.33 and 1.25 times higher than control, for Emblica‐ and Psidium‐based HPS, respectively. Soil moisture conservation could enhance profit by ~30% and 20% in those HPSs, respectively over control. T1 can potentially recycle approximately (a) 83%, 77%, and 71% and (b) 62%, 122%, and 81% higher N, P, and K than control in those HPSs, respectively. Thus, Emblica‐ and Psidium‐based HPS with staggered trenching could be replicated on a wide scale to enhance income, ensure fodder supply, and improve degraded land.

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Strength of Microbes in Nutrient Cycling: A Key to Soil Health

Cited by 51 publications

References 75 publications

Interaction Between Conservation Tillage and Nitrogen Fertilization Shapes Prokaryotic and Fungal Diversity at Different Soil Depths: Evidence From a 23-Year Field Experiment in the Mediterranean Area

Interaction Between Conservation Tillage and Nitrogen Fertilization Shapes Prokaryotic and Fungal Diversity at Different Soil Depths: Evidence From a 23-Year Field Experiment in the Mediterranean Area

Examining assumptions of soil microbial ecology in the monitoring of ecological restoration

Degraded land restoration ecological way through horti‐pasture systems and soil moisture conservation to sustain productive economic viability

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