Shoot growth, tuber yield and quality of two potato cultivars as affected by prohexadione-calcium application

Autor(es)

Luan Santos de Oliveira ^[1] ; Adalton Mazetti Fernandes ^[2] ; Rogério Peres Soratto ; Daniela Han ^[4] ; Rudieli Machado da Silva ^[5]

Afiliação do(s) autor(es)

^[1] Universidade Estadual Paulista. Faculdade de Ciências Agronômicas - Brasil

^[2] Universidade Estadual Paulista. Centro de Raízes e Amidos Tropicais - Brasil

^[4] Universidade Estadual Paulista. Faculdade de Ciências Agronômicas - Brasil

^[5] Universidade Estadual Paulista. Faculdade de Ciências Agronômicas - Brasil

• Tipo de documento: Artigo Científico
• Fonte: Rev. Ceres; v. 68, n. 5, p. 411-419, 2021-11-08.

Resumo

ABSTRACT This study evaluated the effects of the rates and timings of prohexadione-calcium (prohexadione-Ca) application on shoot growth, tuber yield, and quality of two potato cultivars (Agata and Mondial). An experiment with each cultivar was carried out in a greenhouse using a randomized block design with four replications. Treatments consisted of a control and single or sequential foliar applications of prohexadione-Ca at the rate of 50 or 100 g ha-1 (50 g ha-1 applied once, 50 g ha-1 applied twice, 50 g ha-1 applied three times, 100 g ha-1 applied once, 100 g ha-1 applied twice, and 100 g ha-1 applied three times). Prohexadione-Ca application changed the distribution pattern of tuber size in both cultivars. A rate of 100 g ha-1 prohexadione-Ca was applied three times between the stages of tuber initiation and tuber bulking, making the haulm length of the plants short for a long time. Prohexadione-Ca application did not alter the tuber yield and quality of the cultivar Agata, but 50 g ha-1 applied three times or 100 g ha-1 applied twice increased tuber yield in the cultivar Mondial. Only in the cultivar Mondial, 50 g ha-1 prohexadione-Ca applied three times increase tuber dry matter, starch, and protein contents. (AU)

• Processo FAPESP: 17/06505-8 - Resposta da cultura da batata a aplicação de nitrogênio e regulador de crescimento
• Beneficiário: Adalton Mazetti Fernandes
• Modalidade de apoio: Auxílio à Pesquisa - Regular