Phosphate fertilization on nutritional status and growth of upland rice cultivars

• Main Author: Crusciol, C. A.C. [UNESP]
• Publication Date: 2019
• Other Authors: Momesso, L. [UNESP], Nascimento, C. A.C. [UNESP]
• Format: Article
• Language: eng
• Source: Repositório Institucional da UNESP
• Download full: http://dx.doi.org/10.1080/01904167.2019.1628971; http://hdl.handle.net/11449/187794
• topic: absorption efficiency; nutrient accumulated; Oryza sativa; phosphorus; root

Differences among rice genotypes demonstrate that root system of upland rice cultivars influences P acquisition and growth performance. We studied root and shoot growth and nutrition of traditional and modern cultivars of upland rice as affected by P availability (three rates). At the highest P rate, the greatest dry mass was obtained with Maravilha, which was on average 180% higher than Caiapo. The modern has exceeded the traditional in growth performance, besides accumulating more nutrients. Maravilha was more efficient in root and shoot growth, and nutrient absorption with P supply, using less photoassimilates for root growth. Traditional cultivars of upland rice may develop better than modern cultivars in low P availability, with facilitates its adaptation in soils with this condition. Modern cultivars are more responsive to P fertilization, which demonstrates a better option in a cropping system with P supply to aim at high yield.