TITLE:
Stem Population and Tissue Replacement of Urochloa in Different Phenological Stages
AUTHORS:
María de los Ángeles Maldonado Peralta, Adelaido Rafael Rojas García, Jessica Lizbeth Ruíz Clavel, Herminio Aniano Aguirre, Filiberto Magadan Olmedo, Leopoldo Jorge Castañeda, Uriel Mondragón Calderón
KEYWORDS:
Urochloa, Stem Population, Leaf Elongation, Weight Per Stem
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.11 No.8,
August
21,
2020
ABSTRACT: The objective of the present investigation was to
evaluate the Urochloa Insurgent, Piata and Signal grasses by varying the
phenology in the attributes: stem population dynamics, tissue replacement,
leaf:stem relation and weight per stem. The data were analyzed using a
completely randomized block design with arrangement in divided plots and four
replications, the procedure used was PROC GLM from SAS. The Signal grass
presented higher stem density with an average of 450 m?2 stems,
while the meadow with Insurgent grass registered the lowest stem density
throughout the investigation, with an average of 320 m-2 stems;
furthermore, in this treatment, the stem density tended to increase slowly over
time (P = 0.05). The Insurgente and signal grasses showed rapid leaf elongation
from day 21 of regrowth with 123 and 104 cm stem?1, while in Piata
the accelerated leaf elongation was on day 14 with 113 cm stem?1 where it remained active its growth until day 56 (P > 0.05). As the regrowth
age was increasing, the population dynamics of stems and weight per stem were
increasing; in Insurgent and signal the leaf elongation and net growth
increased to a maximum point to start declining; however, in Piata grass was
increasing without decreasing. The trend of the leaf:stem relation was
decreasing as the test progressed and senescence increased from day 21 of
regrowth.