The effect of frequency of defoliation on themeda triandra in the false Thornveld of the Eastern Cape

Abstract

Tufts of Themeda triandra were subjected to different frequencies of defoliation during a single season under irrigated and non‐irrigated conditions. Frequent defoliation (> 5 times per year) severely reduced clipped yield on both moisture treatments. On irrigated treatments, root mass declined and shoot apex elevation was suppressed with increasing frequency of defoliation. Tiller densities and stubble mass were not affected by frequency of clipping. Severe drought experienced during the experimental period probably masked some of the responses to frequency of defoliation on non‐irrigated treatments.