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Abstract

Dry matter yields and chemical composition changes during the dry season in response to fertilization were determined for four grasses: Pangola (Digitaria decumbens, Stent), African Star [Cynodon plectostachyus (K. Schum) Pilg] and Tanner (Bracharia radicans, Napper). The following treatments were used: no fertilization, phosphorus-potassium fertilization (100 kg de P₂O₅ and 100 kg de K₂O/ha), and phosphorus-potassium fertilization in combination with 100, 200 and 300 kg of N/ha. Cuttings were made at 42, 84, 126, 168 and 210 days, respectively. There were reductions in dry matter yields and chemical composition in the four species, as cutting age increased from 42 to 84 days. Fertilization did not have an effect either on dry matter yield or on chemical composition during the dry season. It is recommended that differed pastures be utilized not later than February, in climates similar to Gualaca. If pastures are to be utilized during the dry season as day, no more than 100 kg of N are to be applied at the end of wet season. Of the four evaluated species, Pangola African Star and Tanner in that order, showed the better results in terms of dry matter yield and chemical composition for the dry season.