Data/hora: 10/06/2024 16:34:09

Provedor de dados: 	94	
País: 	Brazil	
Título: 	Balancing guava nutrition with liming and fertilization	
Autores: 	Hernandes,Amanda; Parent,Serge-Étienne; Natale,William; Parent,Léon Étienne.	
Data: 	2012-12-01	
Ano: 	2012	
Palavras-chave: 	Psidium guajava; Compositional data analysis; Isometric log ratios (ilr); Plant mineral nutrition; Aitchison geometry.	
Resumo: 	Guava response to liming and fertilization can be monitored by tissue testing. Tissue nutrient signature is often diagnosed against nutrient concentration standards. However, this approach has been criticized for not considering nutrient interactions and to generate numerical biases as a result of data redundancy, scale dependency and non-normal distribution. Techniques of compositional data analysis can control those biases by balancing groups of nutrients, such as those involved in liming and fertilization. The sequentially arranged and orthonormal isometric log ratios (ilr) or balances avoid numerical bias inherent to compositional data. The objectives were to relate tissue nutrient balances with the production of "Paluma" guava orchards differentially limed and fertilized, and to adjust the current patterns of nutrient balance with the range of more productive guava trees. It was conducted one experiment of 7-yr of liming and three experiments of 3-yr with N, P and K trials in 'Paluma' orchards on an Oxisol. Plant N, P, K, Ca and Mg were monitored yearly. It was selected the [N, P, K | Ca, Mg], [N, P | K], [N | P] and [Ca | Mg] balances to set apart the effects of liming (Ca-Mg) and fertilizers (N-K) on macronutrient balances. Liming largely influenced nutrient balances of guava in the Oxisol while fertilization was less influential. The large range of guava yields and nutrient balances allowed defining balance ranges and comparing them with the critical ranges of nutrient concentration values currently used in Brazil and combined into ilr coordinates.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452012000400032	
Editor: 	Sociedade Brasileira de Fruticultura	
Relação: 	10.1590/S0100-29452012000400032	
Formato: 	text/html	
Fonte: 	Revista Brasileira de Fruticultura  v.34 n.4 2012	
Fonte: 	info:eu-repo/semantics/openAccess