Growth, Production and Nutritive Value of Brachiaria mulato as Affected by Levels of Urea Fertilization

Abstract

This experiment was aimed at investigating growth, production, and nutritive value of Mulato grass (Brachiaria mulato) as affected by levels of urea fertilization. The experiment was designed with a 3 x 6 completely randomized design to test three application levels of urea fertilizer (0, 150, or 300 kg/ha); each of which was replicated six times. The grass was planted, with a planting size of 60 x 75 cm, on 18 plots having an individual size of 3 x 3 m. All the plants were cut at week three after planting and urea was applied on week four. Parameters measured were plant height, tillage number, leaf width, biomass production and nutrient contents (crude protein [N x 6.25], neutral detergent fibers, and crude fat) of plant dry matter, and measurements of (or sample collection for) these parameters were done on week seven after cutting. Between treatment differences were statistically analyzed with an analysis of variance. Results indicated that the levels of urea fertilizer significantly (P<0.05) affected the plant tillage number, dry matter production and crude protein and neutral detergent fiber contents. Applying 150 kg/ha urea increased tillage number, dry matter production and crude protein content of the plant while reducing the neutral detergent fiber content of the plant compared to unfertilized plants. Increasing the urea application level to 300 kg/ha resulted in further increase in tillage number, dry matter production and crude protein content of the plant and further reduced the neutral detergent fiber content. The level of urea application up to 300 kg/ha did not affect the height, leaf width, dry matter, organic matter or crude fat contents of the Mulato grass.