Data/hora: 16/06/2024 08:54:08

Provedor de dados: 	Pesquisa Agropecuária Brasileira	
País: 	Brazil	
Título: 	Tomato yield and potassium concentrations in soil and in plant petioles as affected by potassium fertirrigation	
Autores: 	FONTES,PAULO CEZAR REZENDE; SAMPAIO,REGYNALDO ARRUDA; MANTOVANI,EVERARDO CHARTUNI.	
Data: 	2000-03-01	
Ano: 	2000	
Palavras-chave: 	Lycopersicon esculentum; Optimum rate; Leaf analysis; Soil analysis.	
Resumo: 	Tomato (Lycopersicon esculentum Mill.) cv. Santa Clara was grown on a silt clay soil with 46 mg dm-3 Mehlich 1 extractable K, to evaluate the effects of trickle-applied K rates on fruit yield and to establish K critical concentrations in soil and in plant petioles. Six potassium rates (0, 48, 119, 189, 259 and 400 kg ha-1 K) were applied in a randomized complete block design with four replications. Soil and plant K critical levels were determined at two plant growth stages (at the beginning of the second and fourth cluster flowering). Total, marketable and weighted yields increased with K rates, reaching their maximum of 86.4, 73.4, and 54.9 ton ha-1 at 198, 194, and 125 kg ha-1 K , respectively. At the first soil sampling date K critical concentrations in the soil associated with K rates for maximum marketable and weighted yields were 92 and 68 mg dm-3, respectively. Potassium critical concentrations in the dry matter of the petioles sampled by the beginning of the second and fourth cluster flowering time, associated with maximum weighted yield, were 10.30 and 7.30 dag kg-1, respectively.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2000000300013	
Editor: 	Embrapa Secretaria de Pesquisa e Desenvolvimento

Pesquisa Agropecuária Brasileira	
Relação: 	10.1590/S0100-204X2000000300013	
Formato: 	text/html	
Fonte: 	Pesquisa Agropecuária Brasileira  v.35 n.3 2000	
Fonte: 	info:eu-repo/semantics/openAccess