Soil organic matter pools response to perennial grain cropping and nitrogen fertilizer

Kim, Keun-Bae; Daly, Erin J.; Gorzelak, Monika A.; Hernandez‐Ramirez, Guillermo

doi:10.1016/j.still.2022.105376

Cited by 25 publications

(13 citation statements)

References 48 publications

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“…P-BC, the most conservative practice in our case and one that did not involve soil disturbance, led to a more stable micro-food web (high maturity and structure indices). Our results support the ndings that established perennial crops support more highly structured and complex food webs relative to annual cropping systems (Chauvat et al, 2014, Coulibaly et al, 2017, Sprunger et al, 2019, through a stimulation of the microbial system mostly due to i) inputs above-or belowground of fresh organic material or easily assimilable rhizodeposits (Sun et al, 2019) and ii) buffering of microclimatic conditions (Kim et al, 2022). This could also be con rmed by the higher enzyme activities.…”

Section: Effect Of Perennial Cropsupporting

confidence: 89%

The multi-year effect of different agroecological practices on soil nematode and soil respiration

Sun¹,

Coulibaly²,

Cheviron³

et al. 2022

Preprint

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Background and Aims: Agroecology practices can induce profound changes in soil inevitably inﬂuencing soil biological properties and soil functioning. However, we still lack understanding of how soil biodiversity responds to agroecology practices and to what extent such practices, alone or combined, can be beneficial for soil functioning. Understanding soil biological activities under different agroecology practices is important for predicting carbon cycling in agroecosystems. Methods: By taking advantage of a long-term agricultural experimental research station in France, we monitored soil microbes, nematodes and soil respiration over three years in response to agroecology practices that varied in the rate of nitrogen (N) fertilization (low vs high), the tillage type (deep vs reduced), and the crop residue management (retain vs removal). Results: Shifting from conventional to agroecology practices had strong effects on microbial biomass, nematode community and soil respiration. Reduced N and reduced tillage increased microbial biomass carbon, bacterivore and fungivore density. Perennial biomass crop decreased total nematode and herbivore density, but increased microbial biomass. Perennial biomass crop also significantly increased the structure and maturity indices, but decreased the plant parasite indices. Structural equation modelling showed that microbial biomass had a positive correlation with soil respiration in reduced nitrogen, reduced tillage, and residue removal treatments. Bacterivores had a positive correlation with omnivores/predators and soil respiration, while herbivores had a negative correlation with soil respiration in all the treatments. Conclusions: The different agroecological practices tested in this 4-year trial revealed the resilience of nematode communities and associated functions like CO2 respiration according to practices.

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Section: Effect Of Perennial Cropsupporting

confidence: 89%

The multi-year effect of different agroecological practices on soil nematode and soil respiration

Sun¹,

Coulibaly²,

Cheviron³

et al. 2022

Preprint

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“…The application of organic fertilizers is also reported to improve the yield of grain crops through their influence on SOC and associated soil properties (Mandal et al, 2007). However, similar studies involving perennial grass-based intensive forage production in semi-arid climatic conditions are lacking (Ghosh et al, 2010;Kim et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Changes in soil microbial biomass and organic C pools improve the sustainability of perennial grass and legume system under organic nutrient management

et al. 2023

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IntroductionThe perennial grass–legume cropping system benefits soil because of its high biomass turnover, cover cropping nature, and different foraging behaviors. We investigated the response of soil organic carbon (SOC) pools and their stock to organic and inorganic nutrient management in the Guinea grass and legume (cowpea-Egyptian clover) cropping system.MethodsDepth-wise soil samples were collected after harvesting the Egyptian clover. Based on the ease of oxidation with chromic acid, different pools of SOC oxidizable using the Walkley–Black C method, very labile, labile, less labile, non-labile; and dissolved organic C (DOC), microbial biomass C (MBC), and total organic C (TOC) in soils were analyzed for computing several indices of SOC.Result and discussionAfter 10 years of crop cycles, FYM and NPKF nutrient management recorded greater DOC, MBC, SOC stocks, and C sequestration than the NPK. Stocks of all SOC pools and carbon management index (CMI) decreased with soil depth. A significant improvement in CMI, stratification ratio, sensitivity indices, and sustainable yield index was observed under FYM and NPKF. This grass–legume intercropping system maintained a positive carbon balance sequestered at about 0.8Mg C ha−1 after 10 years without any external input. Approximately 44–51% of the applied carbon through manure was stabilized with SOC under this cropping system. The DOC, MBC, and SOC in passive pools were identified for predicting dry fodder yield. This study concludes that the application of organics in the perennial grass–legume inter cropping system can maintain long-term sustainability, enhance the C sequestration, and offset the carbon footprint of the farm enterprises.

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“…The grasses may have also utilized the applied N fertilizer more efficiently than corn, leaving very little residual inorganic nitrogen in the soil. Previous studies also reported lower inorganic N in the surface soil of the grass buffer than in the corn fields with and without grass buffer (Iqbal et al., 2015; Kim et al., 2022; Mitchell et al., 2015; Salehin et al., 2020).…”

Section: Discussionmentioning

confidence: 84%

Soil health responses of circular grass buffer strips in center‐pivot irrigated agriculture

Sapkota

Ghimire

Angadi

et al. 2023

Soil Science Soc of Amer J

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Decline in water table in the Ogallala Aquifer, along with soil degradation, has threatened the sustainability of agriculture in the US High Plains region. Circular grass buffers in center pivot irrigated cropping systems could support sustainable crop production by providing multiple ecosystem services. This study evaluated soil organic matter (SOM), nutrients, and other selected soil health indicators under circular buffer strip grasses (BSG), adjacent buffer strip corn (Zea mays L.) (BSC), and continuous conventional corn (CCC) in the 0-80 cm soil profile. Soil samples were collected from the center of corn and grass strips for 5 years (2017-2021) and analyzed for nitrate N (NO 3 − -N), soil pH, electrical conductivity, cation exchange capacity, SOM, and soil nutrients. The NO 3 − -N under CCC in 0-20 cm (18.4 mg kg −1 ) and 60-80 cm (4.97 mg kg −1 ) were 1.56 and 1.96 times higher than BSC.The NO 3 − -N was significantly lower under BSG than other treatments in 0-20 cm, 20-40, and 40-60 cm depths. The SOM was similar among all treatments. Response of other nutrients varied among treatments and inter-annually. Soil pH in 0-20 cm depth was 0.1 and 0.3 units lower in CCC (pH = 7.7) than in BSC and BSG. Soil electrical conductivity was 37.5% and 25% greater in CCC than BSG (0.24 and 0.24 dS m −1 ) in 0-20 and 20-40 cm depths, respectively. Grass buffer strips maintaining SOM despite no irrigation, less residual N under corn with grass buffer, and less rapid changes in soil pH suggest the potential of grass buffer to maintain soil health in semi-arid cropping systems facing the transition to dryland.

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Soil organic matter pools response to perennial grain cropping and nitrogen fertilizer

Cited by 25 publications

References 48 publications

The multi-year effect of different agroecological practices on soil nematode and soil respiration

The multi-year effect of different agroecological practices on soil nematode and soil respiration

Changes in soil microbial biomass and organic C pools improve the sustainability of perennial grass and legume system under organic nutrient management

Soil health responses of circular grass buffer strips in center‐pivot irrigated agriculture

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