Data/hora: 19/05/2024 10:38:07

Provedor de dados: 	90	
País: 	Brazil	
Título: 	Beaufils ranges to assess the cotton nutrient status in the southern region of Mato Grosso	
Autores: 	Serra,Ademar Pereira; Marchetti,Marlene Estevão; Rojas,Enrique Pouyú; Vitorino,Antônio Carlos Tadeu.	
Data: 	2012-02-01	
Ano: 	2012	
Palavras-chave: 	Mineral nutrition; Gossypium hirsutum r. latifolium; Leaf analysis; DRIS.	
Resumo: 	The relationships between nutrient contents and indices of the Diagnosis and Recommendation Integrated System (DRIS) are a useful basis to determine appropriate ranges for the interpretation of leaf nutrient contents. The purpose of this study was to establish Beaufils ranges from statistical models of the relationship between foliar concentrations and DRIS indices, generated by two systems of DRIS norms - the F value and natural logarithm transformation - and assess the nutritional status of cotton plants, based on these Beaufils ranges. Yield data from plots (average acreage 100 ha) and foliar concentrations of macro and micronutrients of cotton (Gossypium hirsutum r. latifolium) plants, in the growing season 2004/2005, were stored in a database. The criterion to define the reference population consisted of plots with above-average yields + 0.5 standard deviation (over 4,575 kg ha-1 seed cotton yield). The best-fitting statistical model of the relationship between foliar nutrient concentrations and DRIS indices was linear, with R² &amp;gt; 0.8090, p &lt; 0.01, except for N, with R² = 0.5987, p &lt; 0.01. The two criteria were effective to diagnose the plant nutritional status. The diagnoses were not random, but based on the effectiveness of the chi-square-tested method. The agreement between the methods to assess the nutritional status was 92.59-100 %, except for S, with 74.07 % agreement.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000100018	
Editor: 	Sociedade Brasileira de Ciência do Solo	
Relação: 	10.1590/S0100-06832012000100018	
Formato: 	text/html	
Fonte: 	Revista Brasileira de Ciência do Solo  v.36 n.1 2012	
Fonte: 	info:eu-repo/semantics/openAccess