Authors:
Maria de los Angeles Maldonado Peralta
, Adelaido Rafael Rojas Garcia
*, Filiberto Magadan Olmedo
,
Mariela Pinacho Martinez
, Herminio Aniano Aguirre
and Lauro Gasga Perez,Maxico |
Abstract:
The objective was to evaluate the physical-chemical quality of hybrids Urochloa (Insurgent,
Piata and Signal) at different phenological stages, in the dry tropics. The evaluated variables
were: total forage yield and per components, intercepted radiation, plant height and crude protein
per component. A complete blocks design was used to the random with arrangement in divided
plots and four repetitions, with the procedure PROC GLM of SAS. In the three grasses, the best
total dry matter yield was obtained at 49 days of regrowth, with 6732 kg DM ha-1 in the
Insurgent grass, Piata with 3320 and Signal presented 2675 kg DM ha-1; the leaf component
presented a higher percentage of crude protein, at 14 days, reaching 22, 21 and 21% for the Piata,
Insurgent and Signal grasses, respectively (P = 0.05). As the regrowth increased, the yield of
total dry matter, leaf and plant height increased, on day 49 the decline began; however, the stem
component and senescence increased until day 56. The percentage of intercepted radiation of
95% was on day 42 of regrowth, considering this the optimal cutting moment.
|
