Data/hora: 06/06/2024 09:23:30

Biblioteca(s): | Epagri-Sede.
Data corrente: | 21/09/2012
Data da última atualização: | 21/09/2012
Autoria: | NAVA, G.; ERNANI, P. R.; SÁ, A. A.; PEREIRA, A. J.
Afiliação: | Epagri
Título: | Soil Composition and Nutritional Status of Apple as Affected by LongTerm Application of Gypsum.
Ano de publicação: | 2012
Fonte/Imprenta: | Revista Brasileira de Ciência do Solo, Viçosa, MG, v. 36, n. 1, p. 215-222, 2012.
Idioma: | Inglês

Conteúdo:

A gypsum does not affect the soil negative charges and maintains sulfate in 
the soil solution, making it one of the cheapest products to increase Ca activity 
in soil solution, especially in the deeper soil layers.  Higher Ca levels in the soil 
solution can increase the uptake of this nutrient by apple trees, reducing the 
risk of physiological disorders caused by Ca deficiency.  this study assessed 
the effect of long-term gypsum application on some soil properties and on the 
chemical composition of leaves and fruits of an apple cultivar susceptible to 
fruit disorders associated with low Ca.  the experiment was conducted in São 
Joaquim, in the South of brazil, from 2001 to 2009.  gypsum rates of 0, 1.0, 2.0 and 
3.0 t ha-1  were annually broadcast over the soil surface, without incorporation, in 
an apple orchard with cultivar ´Catarina´, planted in 1997.  gypsum application 
over eight consecutive years had no effect on soil exchangeable K and al to a 
depth of 80 cm, but increased exchangeable Ca in the sampled layers (0?10, 10?20, 
40?60 and 60?80 cm), while exchangeable mg decreased only in the surface layer 
(0?20 cm).  gypsum did not affect the concentration of any nutrient in the fruits, 
including Ca.  the same was verified in the leaves, except for mg which decreased 
with increased gypsum rate.  despite increasing the availability of Ca in the soil 
profile to a depth of 80 cm, gypsum was not effective to increase the Ca content 
in leaves and fruits of an apple cultivar susceptible to Ca deficiency grown in 
an appropriately limed soil.

Palavras-Chave: | Calcium; Cations; Downward movement; Nutritional status.
Categoria do assunto: | --
URL: | http://intranetdoc.epagri.sc.gov.br/producao_tecnico_cientifica/DOC_19177.pdf
Registro original: | Epagri-Sede (Epagri-Sede)
Exemplares: | Epagri-Sede - (90428-1) - UPC - AP - -- -  -  -  - DIS