Morphogenetic and structural characteristics of guinea grass tillers at different ages under intermittent stocking

The objective of this research was to assess morphogenetic and structural characteristics of tillers of guinea grass cv. Tanzania at different ages. The pastures of guinea grass were managed in six pasture conditions related to the combination of three frequencies (90, 95, and 99% light interception) and two post-grazing heights (25 and 50 cm). In these six pastures conditions, three tiller ages were evaluated (young, mature, and old). The design was of completely randomized block with three replications. Young tillers exhibited higher leaf appearance rate and leaf elongation rate and, consequently, higher final leaf length and number of live leaves than mature and old tillers, regardless of the pasture condition. On pastures managed with 90 or 95% light interception associated with a post-grazing height of 25 cm, old tillers presented longer leaf lifespan than young and mature ones. There is a progressive reduction in the vigor of growth of pastures of guinea grass cv. Tanzania with advancing tiller age.

Bibliographic Details

Main Authors:	Barbosa,Rodrigo Amorim, Nascimento Júnior,Domicio do, Vilela,Hélio Henrique, Sousa,Braulio Maia de Lana, Silva,Sila Carneiro da, Euclides,Valéria Pacheco Batista, Silveira,Márcia Cristina Teixeira da
Format:	Digital revista
Language:	English
Published:	Sociedade Brasileira de Zootecnia 2012
Online Access:	http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000700005
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