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Effect of Supplemental Protein and Energy Levels on the Utilization of Kikuyu Grass (Pennisetum Clandestinum)^{1, 2,}

University of Hawaii⁴, Honolulu

Abstract

Digestibility studies were conducted with sheep to investigate the effects of supplemental protein and energy upon the utilization of nutrients in 18-week regrowth kikuyu grass. The levels of supplemental protein were 0, 50 and 100 gm. of SBM per head per day, and the levels of energy supplementation were 0, 50 and 100 gm. of corn per head per day. The utilization of nutrients in both the total ration and in the grass portion of kikuyu grass grown under high rainfall, sub-tropical conditions were studied. Digestibility of organic matter, crude protein, nitrogen-free extract and gross energy increased in the total ration with each SBM level. Digestibility of organic matter, ether extract, nitrogen-free extract and gross energy in the total ration were improved by higher corn levels. Digestibility of crude protein and crude fiber in the grass portion decreased with higher corn levels. An increase in nitrogen retention was found with each higher level of both SBM and corn.

¹ This study was conducted in cooperation with Western Regional Project W-94, Range Livestock Nutrition.

² Journal Series No. 1049 of the Hawaii Agricultural Experiment Station.

³ Present address: Texas Technical Research Station, Pantex.

⁴ Department of Animal Science.