| Full text | |
| Author(s): |
Adalton Mazetti Fernandes
[1]
;
Rogério Peres Soratto
[2]
;
Letícia de Aguila Moreno
[3]
;
Regina Marta Evangelista
[4]
Total Authors: 4
|
| Affiliation: | [1] Universidade Estadual Paulista. Faculdade de Ciências Agronômicas. Centro de Raízes e Amidos Tropicais - Brasil
[2] UNESP. FCA. Departamento de Produção e Melhoramento Vegetal - Brasil
[3] UNESP. FCA. Departamento de Produção e Melhoramento Vegetal - Brasil
[4] UNESP/. FCA. Departamento de Horticultura - Brasil
Total Affiliations: 4
|
| Document type: | Journal article |
| Source: | Bragantia; v. 74, n. 1, p. 102-109, 2015-03-00. |
| Abstract | |
Phosphorus (P) is essential to increase tuber yield and nutritional quality of potato tubers. However, it is unclear whether the influence of P fertilization on quality of tubers produced can vary depending on the cultivar and P availability in soil. This study evaluated the effect of P fertilization on the quality and nutritional composition of marketable tubers of potato cultivars. Experiments in soils with low, medium and high P availability were conducted in a randomized block design, with four replications. Treatments consisted of a 2×5 factorial arrangement of two potato cultivars (Agata and Mondial) and five P2O5 rates (0, 125, 250, 500, and 1,000 kg ha–1). Phosphorus fertilization increased the contents of P and starch, the size and yield of marketable tubers, with more expressive response to higher P rates in the soils with low and medium P availability. The Mondial cultivar had the highest yield, due to a greater tuber weight and greater increases in this characteristic in response to P fertilization. The Mondial cultivar produced tubers with firmer pulp, with higher dry matter percentage and higher contents of Ca, Cu, and Zn than Agata. In the soil with low P availability, P fertilization reduced Zn content, but, in general, had little influence on the nutritional composition of potato tubers. (AU) | |
| FAPESP's process: | 12/12128-9 - Response of potato cultivars Agata and Mondial to phophorus fertilization |
| Grantee: | Leticia de Aguila Moreno |
| Support Opportunities: | Scholarships in Brazil - Scientific Initiation |
| FAPESP's process: | 10/04987-6 - Phosphorus fertilization in potato cultivars (Solanum tuberosum L.) |
| Grantee: | Adalton Mazetti Fernandes |
| Support Opportunities: | Scholarships in Brazil - Doctorate |