Muhamad Ahmad Chozin
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The Effects of Cutting Heights and Intervals of Defoliation on Productivity and Nutrient Content of Brachiaria humidicola (Rendle) Schweick Anis, Selvie Diana; Chozin, Muhamad Ahmad; Hardjosoewignyo, Soedarmaji; Ghulamahdi, Munif; Sudrajat, ,
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 39, No 3 (2011): Jurnal Agronomi Indonesia
Publisher : Bogor Agricultural University

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Abstract

The productivity of forage is strongly  influenced  by cutting height  and  interval of defoliation.   Experiment was conducted at the Research Institute for Industrial Plants and Other Palm (BALITKA) Manado since June 2008 until April 2009.  The objective of the experiment was to find out the effects of intensity and intervals of defoliation on dry weight production and the quality of nutrients.  The experiment was arranged in factorial RCBD. The intensity of defoliation was based  on  cutting  height,  i.e.  5, 10, 15 cm,  whereas the intervals of defoliation were 30, 45, 60 day and 456.54 Degree Days (DD). The data of dry weight production, leaf stem ratio, nutrient quality were collected. The results showed that there were  significant effects of  treatments on  all  parameters. Productivity of  B. humidicola  in terms  of high dry weight yield, high leaf  stem  ratio and crude protein,  low  crude fiber and acid detergent fiber (ADF) content were found in the interaction of intensity 10 cm with the interval of defoliation  among  the  vegetative development  stage of 30 and 45 days, as well as the interval of defoliation  based  on  heat unit accumulation of  456.54 DD.   The research implies  that a cutting height at 10 cm  and  interval of  defoliation  as mentioned  above  is ideal for B. humidicola.  Utilization of growing degree days (GDD) to determine the appropriate time for defoliation is considerable under this experiment.   Keywords: B.  humidicola, defoliation, forage, nutrient,  productivity