Phosphate fertilization on nutritional status and growth of upland rice cultivars |
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| Authors: | C A C Crusciol L Momesso C A C Nascimento |
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| Institution: | 1. S?o Paulo State University (UNESP), College of Agricultural Science, Department of Crop Science, Botucatu, Brazil;2. Netherlands Institute of Ecology (NIOO-KNAW), Department of Microbial Ecology, Wageningen, The Netherlands |
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| Abstract: | 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. |
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| Keywords: | absorption efficiency nutrient accumulated Oryza sativa phosphorus root |
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