| Summary: | The main problem in the development of cattle business people in palm plantation, one exeption availibility of forage animal feed whether in quantity n quality. Other side the existence of palm leaves the midrib has been waste of a disturbing and not been utilized by farmers. To the touch technological innovations feed in te form of silage then palm leaves the midrib has been animal feed worthy of in eating of cattle. The purpose of this research is identify the effects the provisio of feed based silage palm leaves midrib increased body weight on cattle beef and analyzing efficiency the cost of animal feed. Research in farmer group Tanjung Keramat in district Kinali, Pasaman Barat in february until april 2017. Respondent are set down in purposive sampling. This research used 18 tail local bulls created the average 2 until 2, 5 years. Treatment provides was P1 control grass field is 10% from body weght (25 Kg) + bran is 10% from body weght (2,5 Kg) , P2 granting of silage then palm leaves (10 kg) + bran (1,5 Kg) + gliserida ( 2 Kg). In an analysis using t tableindependent sample t-testα=5%. Result of research shows P1 increase body weight cattle 0,68 kg/tail/day and P2 0,81 kg/ tail/ day . Provision of feed based silage then palm leaves significant compared feed control t test (-6,9) > t tabel (2,4). With efficiency cost feed during 90 days P1 (Rp. 967.500,-/cattle) and P2 (Rp. 675.500,-/cattle). So, with provision palm leaves besides increasing body weight cattle, can also reducing the grass that drain time dan energy can reduce the cost daily cattle feed.
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