Data/hora: 02/06/2024 02:25:51

Biblioteca(s): 	Embrapa Arroz e Feijão.	
Data corrente: 	25/08/2005	
Data da última atualização: 	14/05/2022	
Autoria: 	BALIGAR, V. C.; FAGERIA, N. K.	
Afiliação: 	VIRUPAX C. BALIGAR; NAND KUMAR FAGERIA, CNPAF.	
Título: 	Soil aluminum effects on growth and nutrition of cacao.	
Ano de publicação: 	2005	
Fonte/Imprenta: 	Soil Science and Plant Nutrition, v. 51, n. 5, p. 709-713, Sept. 2005.	
DOI: 	https://doi.org/10.1111/j.1747-0765.2005.tb00097.x	
Idioma: 	Inglês	
Conteúdo: 	In acid soils, Al toxicity and nutrient deficiencies are main constraints for low yield of cacao (Theobroma cacao L.). A controlled growth chamber experiment was conducted to evaluate the effect of three Al saturations (0.2, 19, and 26%) adjusted by addition of dolomitic lime on growth and nutrient uptake parameters of cacao. Overall, increasing soil Al saturation decreased shoot and root dry weight, stem height, root length, relative growth rate, and net assimilation rate. However, increasing soil Al saturation increased leaf area, specific leaf area (total leaf area/total leaf dry wt), and leaf area ratio (total leaf area/shoot+root wt). Increasing soil Al saturation decreased uptake of elements. Nutrient influx (IN) and transport (TR) decreased significantly for K, Ca and Mg, and showed an increasing trend for S and P as soil Al saturation increased. However, increasing soil Al saturation significantly increased nutrient use efficiency ratio (ER, mg of shoot weight produced per mg of element in shoot) of Ca, Mg and K and decreased ER for other elements. Reduction of soil acidity constraints with addition of lime and fertilizers appear to be key factors in improving cacao yields in infertile, acidic, tropical soils.	
Thesagro: 	Cação; Nutriente; Theobroma Cacao.	
Thesaurus Nal: 	aluminum.	
Categoria do assunto: 	F Plantas e Produtos de Origem Vegetal	
Registro original: 	Embrapa Arroz e Feijão (CNPAF)	
Exemplares: 	CNPAF - (22932-1) - UPC - AP - DD - 2005 -  - 2005 - DIS