Main content area

Phosphate fertilization on nutritional status and growth of upland rice cultivars

Crusciol, C. A. C., Momesso, L., Nascimento, C. A. C.
Journal of plant nutrition 2019 v.42 no.13 pp. 1516-1528
Oryza sativa, cropping systems, cultivars, fertilizer application, genotype, growth performance, highlands, nutrient uptake, nutrients, nutritional status, phosphates, phosphorus fertilizers, rice, root growth, root systems, roots, shoots, soil
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.