Data/hora: 19/06/2024 03:15:02

Biblioteca(s): | Embrapa Suínos e Aves.
Data corrente: | 10/08/2021
Data da última atualização: | 10/08/2021
Autoria: | NICOLOSO, R. da S.; RICE, C. W.
Afiliação: | RODRIGO DA SILVEIRA NICOLOSO, CNPSA; CHARLES W. RICE, Kansas State University.
Título: | Intensification of no-till agricultural systems: an opportunity for carbon sequestration.
Ano de publicação: | 2021
Fonte/Imprenta: | Soil Science Society of America Journal, 20 Apr. 2021.
DOI: | https://doi.org/10.1002/saj2.20260
Idioma: | Inglês
Conteúdo: | Abstract: The ?4 per 1,000? initiative was launched at the 21st Conference of the Parties (COP21) stimulating a long-standing debate on the potential of no-till (NT) to promote soil C sequestration. Previous reviews found little or no soil organic C (SOC) accrual in NT soils as compared with full inversion tillage when soils are sampled deeper than 30 cm. Here, we present the results of a global meta-analysis of studies assessing SOC and total N (TN) storage and dynamics in NT and tilled soils from the most important agricultural regions of the world. Overall, our results show that NT soils stored 6.7 ± 1.9 Mg C ha?1 and 1.1 ± 0.4 Mg N ha?1 more than tilled soils (0-to-100-cm depth) with an average of 16 yr of NT, in contrast with previous findings. However, C sequestration (+4.7 ± 1.9 Mg C ha?1 in the 0-to-60-cm depth with an average of 11 yr of NT) depended on the association of NT with increased crop frequency and the inclusion of legumes cover crops. Single-cropping systems lack the necessary C inputs to offset SOC losses in the soil profile (below 30-cm depth). However, double-cropping systems decreased soil TN that may constrain future C sequestration. The use of legumes alleviated TN loss and supported soil C sequestration. Briefly, our findings indicate that NT can avoid SOC losses from tilled soils, partially offsetting CO2 emissions from agriculture. Moreover, NT with agricultural intensification can promote soil C sequestration, thus contributing to soil quality, food security, and adaptation to climate change.
Palavras-Chave: | Agricultural systems; Sistemas agrícolas.
Thesagro: | Carbono; Plantio Direto; Solo.
Thesaurus Nal: | Greenhouse gas emissions; Greenhouse soils; No-tillage.
Categoria do assunto: | --
Registro original: | Embrapa Suínos e Aves (CNPSA)
Exemplares: | CNPSA - (22167-1) - UPC - AP - DD -  -  -  - DIS