Data/hora: 14/06/2024 03:05:38

Biblioteca(s): 	Embrapa Caprinos e Ovinos; Embrapa Meio-Norte.	
Data corrente: 	31/07/2023	
Data da última atualização: 	23/08/2023	
Autoria: 	ARAÚJO, M. D. M.; PRIMO, A. A.; FERNANDES, J. K. S.; VIEIRA, L. V.; CLARK, M. V. G.; GUEDES, F. L.; POMPEU, R. C. F. F.; SAGRILO, E.; SOUZA, H. A. de.	
Afiliação: 	MARIA DIANA MELO ARAÚJO, STATE UNIVERSITY OF ACARAÚ VALLEY; ANACLAUDIA ALVES PRIMO, FEDERAL UNIVERSITY OF CEARÁ; JOSE KIOMA SOUSA FERNANDES, STATE UNIVERSITY OF ACARAÚ; LUCAS VASCONCELOS VIEIRA, SCHOOL OF AGRICULTURE SCIENCES, SÃO PAULO STATE UNIVERSITY; MARCUS VINÍCIUS GUIMARÃES CLARK, FEDERAL UNIVERSITY OF PIAUÍ; FERNANDO LISBOA GUEDES, CNPC; ROBERTO CLAUDIO FERNANDES F POMPEU, CNPC; EDVALDO SAGRILO, CPAMN; HENRIQUE ANTUNES DE SOUZA, CPAMN.	
Título: 	Different sources of nitrogen fertilizer in rainfed maize grown in a semiarid environment.	
Ano de publicação: 	2023	
Fonte/Imprenta: 	Arid Land Research and Management, p. 1-20, Jul. 2023. Published online.	
DOI: 	https://doi.org/10.1080/15324982.2023.2240745	
Idioma: 	Inglês	
Conteúdo: 	Abstract: Although nitrogen is the nutrient most required by maize, doses of N lower than those recommended are applied to maize grown in semiarid environments, which limits the achievement of profitable yields. The objective of this study was to evaluate changes in soil fertility, nutritional status and dry matter production of maize plants fertilized with organic and mineral fertilizers in a semiarid region. A factorial experiment was carried out in Sobral, Ceará state, Brazil, in a randomized block design. The factors were two N sources (organic compost and urea), and four N rates: 27.5, 55, 110 and 165&#8201;kg ha&#8722;1, with three replications. We assessed variables associated with soil fertility, plant nutritional status, chlorophyll content, grain yield and total dry matter production. The highest rates of organic compost resulted in the highest levels of P (17.7&#8201;mg dm&#8722;3) and K (102.2&#8201;mg dm&#8722;3) in soil when compared to the control (7.7 and 69.0&#8201;mg dm&#8722;3, respectively). However, organic compost rates below 110&#8201;kg ha&#8722;1 of N-equivalent fertilizer were not enough to supply the plants’ demand for P and K. Low N rates promoted a decrease in soil inorganic N in the second year of application. Applying urea to maize plants led to greater dry matter production than organic compost in the second consecutive crop season. The use of organic compost at rates lower than 110&#8201;kg ha&#8722;1 of N-equivalent fertilizer decreases soil fertility and has no impact on maize dry matter production.	
Palavras-Chave: 	Adubação orgânica; Região semiárida.	
Thesagro: 	Estado Nutricional; Fertilidade do Solo; Nutrição Vegetal; Zea Mays.	
Thesaurus Nal: 	Brazil; Dry matter content; Nutritional status; Plant nutrition; Semiarid zones; Soil fertility.	
Categoria do assunto: 	X Pesquisa, Tecnologia e Engenharia	
Registro original: 	Embrapa Caprinos e Ovinos (CNPC)	
Exemplares: 	CPAMN - (33850-1) - UPC - AP - DD -  -  -  - DIS
CNPC - (40603-1) - UPC - AP - DD -  -  -  - DIS