Phosphorus use efficiency of soybean cultivars in Cerrado conditions of Tocantins, Brazil / Eficiência do uso de fósforo de cultivares de soja em condições de cerrado tocantinense
G. Colombo, J. M. Pelúzio, L. P. M. Pires, Douglas José Daronch, Gilberto Coutinho Machado Filho
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引用次数: 1
Abstract
In order to determine the efficiency and response regarding the use of phosphorus of soybean cultivars, experiments were conducted in the 2013/2014 season, to evaluate 15 soybean genotypes under two phosphorus using a randomized complete block, with three replications. To simulate environments with low and high levels of phosphorus, doses of 40 and 120 kg.ha -1 of P 2 O 5 were applied. Characteristics were evaluated for number of pods per plant, grain yield and using the methodology proposed by Fageria & Kluthcouski (1980), determined efficiency in the use of phosphorus. The environment high phosphorus positively affected the average grain yield in all genotypes, with an increase of 48.9% over the average grain yield in low-phosphorus environment. Cultivars JULIANA RR, M9056 RR, P99R01 and M9144 RR were classified as efficient and responsive as the use of phosphorus.
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