Data/hora: 11/06/2024 06:54:12

Provedor de dados: 	Revista Brasileira de Zootecnia	
País: 	Brazil	
Título: 	Two years of nitrogen and sulfur fertilizations in a signal grass pasture under degradation: changes in the root system	
Autores: 	Silveira,Cristiane Prezotto; Oliveira,Daniela Alves de; Bonfim-Silva,Edna Maria; Monteiro,Francisco Antonio.	
Data: 	2011-06-01	
Ano: 	2011	
Palavras-chave: 	Brachiaria decumbens; Dry mass; Length; Nitrogen concentration; Surface.	
Resumo: 	The objective of this research was to evaluate the effect of combinations of nitrogen and sulfur rates in degraded signal grass (Brachiaria decumbens) pasture on their productive, morphological and nutritional attributes in the root system at four soil depths. The pasture used in the experiment was established over eight years ago in Entisol. Five nitrogen rates (0; 150; 300; 450 and 600 kg/ha/year) and five sulfur rates (0; 15; 30; 45 and 60 kg/ha/year) were combined in a fractionated factorial in a randomized block design, with three replications. Nitrogen was supplied as ammonium nitrate and sulfur as gypsum, and the rates were split into three times in the rainy season. The evaluations occurred at intervals of 35 days during the rainy season and 56 days in the dry season, in two consecutive years. Roots were collected with a 4-cm diameter auger at 0-10; 10-20; 20-30 and 30-40 cm soil depths. It was determined root dry matter, length and surface of the root system and nitrogen and sulfur concentrations in roots. Nitrogen rates applied in two consecutive years in the pasture affected dry mass, length, surface and nitrogen concentration in signal grass root system. Rates of sulfur by themselves or combined with nitrogen rates do not affect attributes of root system.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000600006	
Editor: 	Sociedade Brasileira de Zootecnia	
Relação: 	10.1590/S1516-35982011000600006	
Formato: 	text/html	
Fonte: 	Revista Brasileira de Zootecnia  v.40 n.6 2011	
Fonte: 	info:eu-repo/semantics/openAccess