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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.