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Response of oats to fertilization on red yellow latosol in two planting systems

Response of oats to fertilization on red yellow latosol in two planting systems

Revista Brasileira de Zootecnia 33(1): 79-86

Two field experiments were carried out on a Red Yellow Latosol (Hapludox), at S(a)over tilde>o Carlos, SP in order to determine the rates of N, P, and K to obtain maximum economic return per area of forage yield for the oat line UPF 87111 grown in two planting systems: conventional tillage and mulch-covered. The experimental design was a fractionated factorial type (1/2)43, with two blocks. The treatments consisted of four rates of N and K2O (0, 70, 140, and 2 10 kg ha-1), using urea and potassium chloride, and four rates of P2O5 (0, 60, 120 and 180 kg ha-1), using triple superphosphate. The N, P, and K rates for maximum profit were, in kg ha-1 for conventional tillage: N = 160, P2O5 = 180, K2O = 180; and for mulch-covered: N = 200, P2O5 = 120, K2O = 95 resulting in forage yields of, respectively, 7,398 and 8,111 kg ha-1 of dry matter. In both planting systems, the use of nitrogen resulted in higher forage yield per unit of applied fertilizer.

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