Data/hora: 19/06/2024 22:28:00

Biblioteca(s): 	Embrapa Cerrados; Embrapa Soja.	
Data corrente: 	22/11/2021	
Data da última atualização: 	04/04/2022	
Autoria: 	NOGUEIRA, T. A. R.; MIRANDA, B. G.; JALAL, A.; LESSA, L. G. F.; TEIXEIRA FILHO, M. C. M.; MARCANTE, N. C.; ABREU-JUNIOR, C. H.; JANI, A. D.; CAPRA, G. F.; MOREIRA, A.; MARTINS, E. de S.	
Afiliação: 	THIAGO ASSIS RODRIGUES NOGUEIRA, UNESP; BRUNO GASPAROTI MIRANDA, UNESP; ARSHAD JALAL, UNESP; LUÍS GUSTAVO FREDIANI LESSA, UNESP; MARCELO CARVALHO MINHOTO TEIXEIRA FILHO, UNESP; NERICLENES CHAVES MARCANTE, MINERAGRO; CASSIO HAMILTON ABREU-JUNIOR, CENA/USP; ARUN DILIPKUMAR JANI, USDA/NRCS; GIAN FRANCO CAPRA, Università degli Studi di Sassar; ADONIS MOREIRA, CNPSO; EDER DE SOUZA MARTINS, CPAC.	
Título: 	Nepheline Syenite and Phonolite as Alternative Potassium Sources for Maize.	
Ano de publicação: 	2021	
Fonte/Imprenta: 	Agronomy, v. 11, n. 7, 1385, 2021.	
Páginas: 	19 p.	
DOI: 	https://doi.org/10.3390/agronomy11071385	
Idioma: 	Inglês	
Conteúdo: 	Abstract: Some silicate rocks are a rich source of potassium (K), with the possibility for use in agriculture. The present study aimed to evaluate the agronomic efficiency index (AEI) of nepheline syenite (NS) and phonolite (PN) rocks in comparison with potassium chloride (KCl) as a K source in maize production. An experiment was conducted in a greenhouse in Ilha Solteira, São Paulo, Brazil. A maize hybrid was grown in 8 L pots filled with 6 kg of soil with a low K concentration and contrasting physical attributes (medium and sandy texture). A completely randomized design in a 3 6 factorial scheme was used, consisting of three K sources (NS, PN, and KCl) and six rates (0, 50, 100, 150, 200, and 400 mg kg&#1048576;1) with four replications. All plants were harvested 45 days after emergence to evaluate biomass production, macronutrient (N, P, K, Ca, Mg, and S) concentration and uptake, stem diameter, and leaf chlorophyll index. After crop harvest, soil was collected for further chemical evaluation, which included organic matter (OM), pH, cation exchange capacity (CEC), H+Al, Al, sum of bases (SB), base saturation (BS), P, K, Ca, Mg, and S. In addition, AEI of NS and PN were also verified in relation to KCl. The application of NS and PN had a similar effect on soil chemical attributes (MO, pH, SB, CEC, and BS) as well as on the concentrations of K, Ca, Mg, and S, in both soils. The increase in NS and PN rates provided linear growth of shoot dry matter. Leaf macronutrient concentrations were similar for NS and PN compared to KCl. All three K sources (NS, PN, and KCl) increased K accumulation in maize plants. Maize treated with KCl had the largest AEI, followed by PN and NS. However, the results indicated similar AEI with both rocks as a K source for maize, especially with application of the highest K rates. This research demonstrated the efficiency of NS and PN as alternative K sources for maize.	
Palavras-Chave: 	Igneous rock; Índice de eficiência agronômica; Pó de rocha; Rocha ígnea; Rock powder; Zea mays L.	
Thesagro: 	Potássio; Rocha; Zea Mays.	
Thesaurus Nal: 	Igneous rocks.	
Categoria do assunto: 	--
X Pesquisa, Tecnologia e Engenharia	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/230743/1/agronomy-11-01385-v2-1.pdf
http://ainfo.cnptia.embrapa.br/digital/bitstream/item/227974/1/Eder-Nepheline-Syenite-and-Phonolite.pdf	
Registro original: 	Embrapa Soja (CNPSO)	
Exemplares: 	CPAC - (37151-1) - UPC - AP - DD - DIGITAL -  - DIGITAL - DIS
CNPSO - (40374-1) - UPC - AP - DD -  -  -  - DIS