Publication: CAROTENE YIELD IN SWEET POTATO AFTER POTASSIUM AND PHOSPHORUS FERTILISER APPLICATION
Loading...
Date
Advisor
Coadvisor
Graduate program
Undergraduate course
Journal Title
Journal ISSN
Volume Title
Publisher
Univ Fed Rural Semi-arido-ufersa
Type
Article
Access right
Acesso aberto
Abstract
Sweet potato is one of the most important foods in the world. Among the different cultivated genotypes, it is worth highlighting those with orange pulp due to their ability to supply adequate amounts of provitamin A carotenoids to humans. This study evaluates the effect of potassium and phosphorus fertiliser application on carotenoid yield in sweet potatoes. Two experiments were carried out in Sao Luis City, Maranhao State, Brazil. The experimental design was a randomised block design, with six treatments for each of the studies (0, 30, 60, 90, 120 and 150 kg ha(-1) K2O and 0, 60, 120, 180, 240 and 300 kg ha(-1) P2O5), with four replicates. Cultivar 'Beauregard' was used, which has high levels of carotenoids. Roots were harvested at 123 days after planting for both experiments. The following variables were evaluated: root fresh and dry weight, dry weight content, in addition to the yield and contents of total carotenoids, alpha-carotene, beta-carotene, 13-cis beta-carotene and 9-cis beta-carotene. With the average data of the evaluated characteristics, we performed analysis of variance and polynomial regression analysis. Potassium rates influenced carotenoid yield in sweet potato roots, with the rates of 73 to 77 kg ha(-1) K2O being recommended to maximise the production of total carotenoids, 0carotene, and a-carotene. Phosphorus, in turn, influenced only total carotenoids, and is recommended at the rate of 174.09 kg ha(-1) P2O5 to maximise the production of these nutrients.
Description
Keywords
Ipomoea batatas, Carotenoids, Vitamin A
Language
English
Citation
Revista Caatinga. Mossoro: Univ Fed Rural Semi-arido-ufersa, v. 32, n. 3, p. 851-857, 2019.
