EFECTO DE LA FERTILIZACIÓN EN EL ESTABLECIMIENTO DE Andropogon gayanus CV. CIAT-621. I. SUELO OS CURO PLÁSTICO NO GLEYZADO

Abstract

The effect of different treatments (control, N, P, K, NP, NK, PK and NPK) on the establishment of Andropogon gayanusunder a non-irrigated system was investigated using a randomized block design and four replications. 50, 50 and 50 kg of N, P2O5 and K2O/ha respectively were applied. P was supplied at the sowing time but the missing fertilizers (N and/or K) 70 days later. The first cutting was made 11 months after sowing. Ground cover, weed invasion, plant height and DM yield were measured but significative differences were not recorded. Herbage yield during the first cutting was about 2 DM t/ha for the control and 2,8 DM t/ha for the higher yielding treatments (P and K). According to the results, fertilizers are not recommended for Andropogon establishment under this soil condition.