Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Narrowing the soil carbon gap in croplands
Narrowing the soil carbon (C) gap that exists between current and pre-intensive cultivation C levels is critical to improve the declining soil services. Here, some knowledge gaps and opportunities to narrow this gap are discussed. Merely adopting practices (e.g., regenerative agriculture, conservation agriculture, cover crops) based on their intended C benefits with limited consideration of the mechanisms affecting C gains will not result in significant atmospheric C capture in the soil profile. Biomass C input primarily drives soil C gains. Yet, the aboveground and belowground biomass C input in croplands even under improved practices such as no-till is mostly concentrated near the soil surface and, in some climates, does not exceed minimum thresholds. Low biomass productivity and limited biomass input into the soil profile probably constrain C gains more than other factors (e.g., initial soil C, C priming, duration, soil texture). Designing or redesigning strategies that photosynthetically capture some of the abundant atmospheric C in deeper soil profile should be first on our agenda. This includes introducing high aboveground and belowground biomass producing forages, perennials, and cover crops, while balancing with food production. C-depleted soils or marginally productive croplands may have a high potential for C storage, but climate, a strong predictor of biomass production, merits consideration. Overall, many factors affect C gains, but none probably are as critical as boosting biomass C input into the soil profile if the goal is to narrow the C gap.
Narrowing the soil carbon gap in croplands
Narrowing the soil carbon (C) gap that exists between current and pre-intensive cultivation C levels is critical to improve the declining soil services. Here, some knowledge gaps and opportunities to narrow this gap are discussed. Merely adopting practices (e.g., regenerative agriculture, conservation agriculture, cover crops) based on their intended C benefits with limited consideration of the mechanisms affecting C gains will not result in significant atmospheric C capture in the soil profile. Biomass C input primarily drives soil C gains. Yet, the aboveground and belowground biomass C input in croplands even under improved practices such as no-till is mostly concentrated near the soil surface and, in some climates, does not exceed minimum thresholds. Low biomass productivity and limited biomass input into the soil profile probably constrain C gains more than other factors (e.g., initial soil C, C priming, duration, soil texture). Designing or redesigning strategies that photosynthetically capture some of the abundant atmospheric C in deeper soil profile should be first on our agenda. This includes introducing high aboveground and belowground biomass producing forages, perennials, and cover crops, while balancing with food production. C-depleted soils or marginally productive croplands may have a high potential for C storage, but climate, a strong predictor of biomass production, merits consideration. Overall, many factors affect C gains, but none probably are as critical as boosting biomass C input into the soil profile if the goal is to narrow the C gap.
Narrowing the soil carbon gap in croplands
Humberto Blanco-Canqui (Autor:in)
2025
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
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