Título:	Nutrient accumulation in cover crops under contrasting water regimes in the Brazilian cerrado
Autor(es):	Silva, Alberto do Nascimento Ribeiro Junior, Walter Quadros Ramos, Maria Lucrecia Gerosa Lima, Cristiane Andrea de Jayme-Oliveira, Adilson Silva, Antonio Marcos Miranda Carvalho, Arminda Moreira de
E-mail do autor:	mailto:lucrecia@unb.br
ORCID:	https://orcid.org/0000-0002-4516- 7352 https://orcid.org/0000-0002-6283-9843
Assunto:	Solo - proteção Estresse hídrico Amaranto Quinoa
Data de publicação:	3-Out-2022
Editora:	MDPI
Referência:	SILVA, Alberto do Nascimento et. al. Nutrient accumulation in cover crops under contrasting water regimes in the Brazilian cerrado. Atmosphere, Basel, v. 13, n. 10, art. 1617, 2022. DOI 10.3390/atmos13101617. Disponível em: https://www.mdpi.com/2073-4433/13/10/1617. Acesso em: 17 nov. 2022.
Abstract:	Brazilian Cerrado has a dry period, and the inclusion of new species for diversification in the production system needs to be drought-tolerant. This work aimed to evaluate biomass and nutrient accumulation in species with potential as cover crops and grain crops under different water levels. Irrigation treatments were obtained through an irrigation bar with sprinklers with increasing water flows to create a continuous gradient. The experimental design randomized complete blocks in split plots with four replications. The main plots were composed of four water regimes (167 mm, 268 mm, 381 mm and 432 mm), and the subplots were formed by the following cover crops: Amaranthus cruenthus, Chenopodium quinoa and Pennisetum glaucum, the latter already used for this purpose. Amaranthus cruenthus and P. glaucum recorded the highest dry biomass (10.16 and 9.75 Mg ha−1, respectively). Dry biomass production and the cellulose contents decreased with the reduction of water availability for all species. A. cruenthus was the species that most accumulated P (37.42 kg ha−1), K (416.92 kg ha−1), Mg (30.88 kg ha−1), S (43.53 kg ha−1), Fe (2.22 kg ha−1), B (0.124 kg ha−1) and Zn (0.240 kg ha−1 ). Amaranthus cruenthus produced the highest yield. Under high and low water availability conditions, A. cruenthus presents potential as a cover crop and grain cash crop, in addition to accumulating more nutrients; P. glaucum has potential as a cover crop and C. quinoa only for grain production.
Unidade Acadêmica:	Faculdade de Agronomia e Medicina Veterinária (FAV)
Licença:	Atmosphere - No special permission is required to reuse all or part of article published by MDPI, including figures and tables. For articles published under an open access Creative Common CC BY license, any part of the article may be reused without permission provided that the original article is clearly cited. Reuse of an article does not imply endorsement by the authors or MDPI. Fonte: https://www.mdpi.com/openaccess. Acesso em: 17 nov. 2022.
DOI:	https://doi.org/10.3390/atmos13101617
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