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- Title
Liming and phosphorus fertilization increase cassava root yield without affecting its cooking time.
- Authors
Rosa, Ben-Hur S.; Fernandes, Adalton M.; Gazola, Bruno; Nunes, Jesion G. S.; Soratto, Rogério P.
- Abstract
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.
- Subjects
CASSAVA; LIMING of soils; ACID soils; NUTRITIONAL status; FERTILIZER application; PHOSPHORUS
- Publication
Agronomy Journal, 2021, Vol 113, Issue 5, p4386
- ISSN
0002-1962
- Publication type
Article
- DOI
10.1002/agj2.20842