Thidiazuron effects on shoot growth, return bloom, fruit set and nutrition of apples


Autoria(s): Amarante,Cassandro Vidal Talamini do; Ernani,Paulo Roberto; Blum,Luiz Eduardo Bassay; Megguer,Clarice Aparecida
Data(s)

01/10/2002

Resumo

Apple (Malus domestica Borkh.) trees, cultivars Gala and Fuji, were sprayed at full bloom with thidiazuron (TDZ) at doses of 0, 5, 10, or 20 g ha-1 of a.i. in order to evaluate its effects on plant growth and development, return bloom, fruit set, nutrition, and fruit yield. Fruit set increased with TDZ dose in 'Gala' but not in 'Fuji'. TDZ did not affect fruit yield in any cultivar. In 'Gala', the return bloom was reduced in about 50% at TDZ doses of 10 or 20 g ha-1. TDZ increased shoot growth in both cultivars. In leaves, TDZ decreased the concentration of Ca and Mg in 'Gala' and of Mg in 'Fuji', but did not affect the chlorophyll content, leaf area, length, width, and dry mass per cm² regardless of cultivar. In fruits, the effect of TDZ varied according to the portion evaluated. Highest doses of TDZ decreased the concentration of Ca and K in 'Gala' and of K in 'Fuji' in the entire fruits (flesh + skin); in the skin, highest doses of TDZ reduced the levels of N, Ca, and Mg in both cultivars, in addition to the level of K in 'Fuji'.

Formato

text/html

Identificador

http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2002001000003

Idioma(s)

en

Publicador

Embrapa Informação Tecnológica

Pesquisa Agropecuária Brasileira

Fonte

Pesquisa Agropecuária Brasileira v.37 n.10 2002

Palavras-Chave #Malus domestica #cytokinin #phenylurea #calcium #fruit yield #pollination #plant development
Tipo

journal article