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

Revista Brasileira de Zootecnia

Rodrigo Amorim Barbosa²  Domicio Do Nascimento Júnior¹  Hélio Henrique Vilela¹  Braulio Maia De Lana Sousa¹  Sila Carneiro Da Silva¹  Valéria Pacheco Batista Euclides²  Márcia Cristina Teixeira Da Silveira¹ 

[1] ,Embrapa Gado de CorteCampo Grande MS

关键词: grazing management;    light interception;    Panicum maximum;    sward height;   

DOI  :  10.1590/S1516-35982012000700005

来源: SciELO

【 摘 要 】

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.

【 授权许可】

CC BY   
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