Liming and phosphorus fertilization increase cassava root yield without affecting its cooking time

Autor(es)

Rosa, Ben-Hur S. ^[1] ; Fernandes, Adalton M. ^[2] ; Gazola, Bruno ^[1] ; Nunes, Jesion G. S. ^[1] ; Soratto, Rogerio P. ^{[3, 2]}

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ UNESP, Coll Agr Sci, Botucatu, SP - Brazil

^[2] Sao Paulo State Univ UNESP, Ctr Trop Roots & Starches CERAT, Av Univ 3780, BR-18610034 Botucatu, SP - Brazil

^[3] Sao Paulo State Univ UNESP, Coll Agr Sci, Dept Crop Sci, Botucatu, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: AGRONOMY JOURNAL; v. 113, n. 5 SEP 2021.
• Citações Web of Science: 0

Resumo

Acidity and low P availability in tropical soils constrain cassava (Manihot esculenta Crantz) yield. Liming increases soil Ca and P availability, but Ca can increase the storage root cooking time, and its effects vary with soil P availability. The effects of liming and P fertilization on cassava yield and their relationship with storage root cooking need to be better understood. A 2-yr field experiment was conducted to evaluate the effect of liming at 0, 1.5, 3.1, and 4.8 Mg ha(-1) with 0 or 70 kg P ha(-1) on plant nutritional status and growth, yield, and cooking of fresh storage roots of the cassava cultivar IAC 576-70. Foliar concentrations were increased for N, P, and Mg and reduced for Mn and Zn with lime application. Maximum cassava fresh storage root yield (26.4 Mg ha(-1)) was obtained with an optimal lime rate of 3.0 Mg ha(-1) and a base saturation of 50%. Liming promoted a 6.5% increase (1.7 min) in the cooking time of storage roots. Application of P fertilizer increased shoot biomass in acidic soil and the diameter and mean weight of the storage roots in the amended soil. Phosphorus fertilization increased the yield (22% or 4.7 Mg ha(-1)) and P concentration of the storage roots without changing their P/Ca ratio or cooking time. Liming and P fertilization can be managed to improve cassava storage root yield without affecting storage root cooking. (AU)

• Processo FAPESP: 15/20211-1 - Crescimento, produtividade e cozimento da mandioca em resposta a calagem e a adubação fosfatada
• Beneficiário: Ben-Hur e Souza Rosa
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica