Soil properties modulate actual evapotranspiration and precipitation impacts on crop yields in the USA

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 949, P. 175172 - 175172

Published: July 31, 2024

Crop yields are affected by hydroclimatic and edaphic conditions, but their interacting roles often neglected when assessing crop at the regional scale. Moreover, used conditions such as precipitation temperature not physiologically linked to primary production actual evapotranspiration. Using statistical models, we quantified combined effects of on county irrigated rice rainfed corn, soybean, spring winter wheat in USA (2000-2019). Precipitation temperature, or evapotranspiration, aggregated during growing season before after flowering/silk emergence, interaction with soil sand content bulk density, explained up 87 % yield variability. However, evapotranspiration better than interactions for most combinations crops growth periods. At high plateaued or, wheat, decreased. Yields were generally sensitive changes part rather entire season, flowering. Soil texture density modulated impacts conditions: corn soybean higher finer soils compared sandy under lower low Additionally, yield-maximizing decreased increased crops. Increasingly available estimates, properties, offer an alternative, more physiologically-based, predictor over large climatic gradients widely temperature.

Language: Английский

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Biochar and Straw Amendments over a Decade Divergently Alter Soil Organic Carbon Accumulation Pathways

Agronomy, Journal Year: 2024, Volume and Issue: 14(9), P. 2176 - 2176

Published: Sept. 23, 2024

Exogenous organic carbon (C) inputs and their subsequent microbial mineral transformation affect the accumulation process of soil C (SOC) pool. Nevertheless, knowledge gaps exist on how different long-term forms crop straw incorporation (direct return or pyrolyzed to biochar) modifies SOC composition stabilization. This study investigated, in a 13-year field experiment, functional fractions protection by iron (Fe) oxide minerals soils amended with biochar. Under equal input, was enhanced both direct (by 43%) biochar 85%) compared non-amended conventional fertilization, but pathways. Biochar had greater efficiency increasing through stable exogenous inhibition respiration. Moreover, biochar-amended contained 5.0-fold SOCs particulate matter (POM) 1.2-fold more mineral-associated (MAOM) relative conventionally fertilized soils. Comparatively, although magnitude effect smaller, straw-derived OC preserved preferentially most MAOM. Straw increased nutrient content stimulated activity, resulting increases necromass POM MAOM 117% 43%, respectively) 72% 18%). promoted poorly crystalline (Feo) organically complexed (Fep) Fe oxides accumulation, were significantly positively correlated SOC. The results address decadal-scale effects application formation pool soil, understanding causal mechanisms can allow practices maximize content. These are great implications for better predicting accurately controlling response pools agroecosystems future changes disturbances maintaining regional balance.

Language: Английский

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Why no-till system sequesters more carbon and is more resilient and productive with contrasting fertilization regimes in a highly weathered soil?

Soil and Tillage Research, Journal Year: 2024, Volume and Issue: 244, P. 106179 - 106179

Published: June 20, 2024

Language: Английский

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Divergent effects of long-term fertilization on the carbon management index across soil profiles in key Chinese croplands

CATENA, Journal Year: 2024, Volume and Issue: 243, P. 108207 - 108207

Published: June 26, 2024

Language: Английский

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Rapid climate changes responsible for increased net global cropland carbon sink during the last 40 years

Ecological Indicators, Journal Year: 2024, Volume and Issue: 166, P. 112465 - 112465

Published: Aug. 13, 2024

Language: Английский

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