Biomass flow of the tanzânia grass under three defoliation frequencies and two post-grazing residues

Abstract

The biomass flow were evaluated in tanzania grass under two defoliations frequencies, consisting of three levels of photosynthetically active radiation interception (IRFA 85, 95 and 97%) and two post-grazing residues (residual leaf area index, IAFr, 1.0 and 1.8) in an entirely randomized design in a factorial arrangement 3x2, with four replicates. It had effect of photosynthetically active radiation interception and of residual leaf area index under foliate appearance tax (TAlF). There was effect of the interaction IRFA x IAFr under the relationship TAlF1/TAlF2. The steam allonge tax (TAlH) suffered effect only of photosynthetically active radiation interception. There was effect of photosynthetically active radiation interception and of IAFr under foliate senescence tax. The photosynthetically active radiation interception of 85% as well as residual leaf area index 1.8 obtained the great values of foliate appearance tax. The Phylochron suffered effect of the interaction IRFA x IAFr. For accumulation forages tax was effect only of the photosynthetically active radiation interception. There was an expressive increase of steam allonge tax along the grazing cycles. The use of moment of the tanzânia grass must not to exceed 95% of interception, being able to use a residual leaf area index of 1,0 and to promote greater losses of forage by senescence.