Predicted Annual Biomass Input to Maintain Soil Organic Carbon under Contrasting Management

Gollany, Hero T.; Nash, P. R.; Johnson, Jane M. F.; Barbour, Nancy W.

doi:10.2134/agronj2018.10.0698

Cited by 5 publications

(6 citation statements)

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“…The Rickman model here exposed is an improvement of the Douglas-Rickman model, and has been extensively used with good results in a wide variety of climates and crops to predict decomposition or to aid in soil carbon modeling [41,43,45,72,73]. The best E values were always obtained for C in all the CCs, ranging from 0.64 to 0.72 (Table 8).…”

Section: C N and P Modellingmentioning

confidence: 98%

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Study of C, N, P and K Release from Residues of Newly Proposed Cover Crops in a Spanish Olive Grove

et al. 2020

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Cover crops (CC)s are increasingly employed by farmers in olive groves. Spontaneous soil cover is the most commonly used CC. Its continuous utilization changes ruderal flora. It is necessary to study new CCs. Living CCs provide C and nutrients to soil during decomposition. Information on this issue in olive groves is scarce. A 4-year field study involving grab sampling of Brachypodium distachyon, Sinapis alba and spontaneous CC residues was conducted to study C and nutrient release from cover crop residues. Throughout the decomposition cycles, C, N and P release accounted for 40 to 58% of the C, N and P amounts in the residues after mowing. Most K was released (80–90%). Expressed in kg per hectare, the release of C and N in Brachypodium (C: 4602, N: 181, P: 29, K: 231) and Sinapis (C: 4806, N: 152, P: 18, K: 195) was greater than that in spontaneous CC (C: 3115, N: 138, P: 21, K: 256). The opposite results were observed for K. The Rickman model, employed to estimate the amount of C, N and P in residues, yielded a good match between the simulated and measured values. In comparison to spontaneous CC, the newly proposed CCs have a higher potential to provide soil with C and N.

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Section: C N and P Modellingmentioning

confidence: 98%

“…Both have proven to be useful to predict residue decomposition under Mediterranean conditions [42,43], as well as in a wide range of climates [44]. These models are currently used alone or as part of more complex soil models [41,45,46].…”

Section: Introductionmentioning

confidence: 99%

Study of C, N, P and K Release from Residues of Newly Proposed Cover Crops in a Spanish Olive Grove

et al. 2020

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“…To identify biomass thresholds for maintaining soil quality, several studies in the U.S. Corn Belt have quantified the C inputs needed in a maize-soybean rotation to sustain SOC. Using simulation models, Huggins et al (1998) and Gollany et al (2019) estimated that 5.6 C ha −1 yr −1 (from aboveground biomass and roots under tillage) or 3.8 Mg C ha −1 yr −1 (aboveground biomass under no-tillage), respectively, was required to sustain SOC in the 0-to 30-cm soil depth. However, the effect of biomass on SOC sequestration and the required C inputs under different rice-based rotations including pasture and annual crops in temperate regions has not been quantified.…”

Section: Core Ideasmentioning

confidence: 99%

“…(1998) and Gollany et al. (2019) estimated that 5.6 C ha −1 yr −1 (from aboveground biomass and roots under tillage) or 3.8 Mg C ha −1 yr −1 (aboveground biomass under no‐tillage), respectively, was required to sustain SOC in the 0‐ to 30‐cm soil depth. However, the effect of biomass on SOC sequestration and the required C inputs under different rice‐based rotations including pasture and annual crops in temperate regions has not been quantified.…”

Section: Introductionmentioning

confidence: 99%

Irrigated rice rotations affect yield and soil organic carbon sequestration in temperate South America

et al. 2022

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Rice (Oryza sativa L.) systems rotated with perennial pastures have intensified in South America to increase annual grain productivity, but the effects on rice yield and soil quality remain poorly understood. We evaluated rice grain yield, crop and pasture biomass production, and soil organic carbon (SOC) and total nitrogen stocks (0-15-cm depth) in three rice-based rotations over 8 yr in Uruguay. Treatments were: (a) rice-pasture [a 5 yr rotation of rice-ryegrass (Lolium multiflorum Lam.)-rice, then 3.5 yr of a perennial mixture of tall fescue (Festuca arundinacea Schreb.), white clover (Trifolium repens L.), and birdsfoot trefoil (Lotus corniculatus L.)], (b) rice-soybean [a 2-yr rotation of rice-ryegrass-soybean (Glycine max [L.] Merr.)-Egyptian clover (Trifolium alexandrinum L.)], and (c) rice-cover crop (an annual rotation of rice-Egyptian clover). Rice after soybean or pasture achieved the highest yield (9.8 Mg ha -1 ), 9% higher than rice after rice in the rice-pasture and rice-cover crop systems. Estimated belowground biomass under rice-pasture (2.7 Mg ha -1 ) was 12 and 42% greater than under rice-cover crop and rice-soybean rotations, respectively. Rice-pasture showed an increase of 0.6 Mg ha -1 yr -1 of SOC; no changes were observed in the intensified rotations replacing pasture with additional rice or soybean. All systems sustained soil total N. These results provide insights for implementing sustainable rice-based rotations, with rice-pasture being the only system that increased SOC while achieving high rice yields and belowground biomass productivity.

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“…It works on a daily time-step and performs long-term (e.g., 100-yr) simulations. It simulates the effects of climate (Gollany, 2016;Gollany et al, 2013), crop rotations (Gollany et al, 2012(Gollany et al, , 2013Liang et al, 2008), amendment additions (Plaza et al, 2012;Rickman et al, 2001), crop residue burning (Gollany et al, 2012;Liang et al, 2009;Rickman et al, 2001) or crop residue removal (Gollany et al, 2010(Gollany et al, , 2011Gollany et al, 2020), and tillage management practices on SOC stocks in a soil profile of up to five layers (Gollany & Elnaggar, 2017;Leite et al, 2009;Liang et al, 2009;Rickman et al, 2002;Wilhelm et al, 2010). Soil organic matter change is computed by maintaining a soil C budget for C additions from atmospheric CO 2 sequestration during photosynthesis or from added amendments, and organic C losses as CO 2 through microbial decomposition (Liang et al, 2009).…”

Section: Description Of the Modelsmentioning

confidence: 99%

Assessing the effectiveness of agricultural conservation practices in maintaining soil organic carbon under contrasting agroecosystems and a changing climate

Gollany¹,

Grosso

Dell

et al. 2021

Soil Science Soc of Amer J

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Conventional tillage, CT; conventional tillage wheat-fallow without N fertilizer, CT 0 W-F; conventional tillage wheat-fallow with 135 kg N ha-1 fertilizer, CT 135 W-F; no-till, NT; no-till wheat-fallow experiment (A) without nitrogen fertilizer added, NT A0 W-F; no-till wheat-fallow experiment (A) with 135 kg N ha-1 fertilizer, NT A135 W-F; no-till wheat-pea cover crop experiment (B) without N fertilizer added, NT B0 W-P; no-till wheat-pea cover crop experiment (B) with 135 kg N ha-1 fertilizer, NT B135 W-P; soil organic carbon, SOC; winter wheat fallow rotation, W-F; representative concentration pathways assuming greenhouse gas emissions declines following a mid-century peak, RCP4.5; representative concentration pathways assuming greenhouse gas emissions continuing at the current rates through 2100, RCP8.5.

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Predicted Annual Biomass Input to Maintain Soil Organic Carbon under Contrasting Management

Cited by 5 publications

References 0 publications

Study of C, N, P and K Release from Residues of Newly Proposed Cover Crops in a Spanish Olive Grove

Study of C, N, P and K Release from Residues of Newly Proposed Cover Crops in a Spanish Olive Grove

Irrigated rice rotations affect yield and soil organic carbon sequestration in temperate South America

Assessing the effectiveness of agricultural conservation practices in maintaining soil organic carbon under contrasting agroecosystems and a changing climate

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