Arachis glabata is new variety forage which tolerates drought and provide high protein.This kind of plant is suitable as dairy cow diet. The research was divided into 2 experiments Experiment 1 was conducted to study on nutritive value of Arachis glabata.The experimental design was Randomized Completely Block Design (RCBD) experiment with three treatments. Each treatment consisted of three blocks (three crops) and followed different three variety of Arachis glabata as Cv. Florigraze Cv. Arbook and Cv. Ecotart. Results showed that three variety of Arachis glabata were 28.26-30.75 % of dry matter (P>0.05). In addition Arachis glabata Cv. Arbook was grater 19.78 % of protein than other group of Arachis glabata (P<0.01). Furthermore Arachis glabata Cv. Florigraze was grater 17.63 of hemicelluloses and 3830.00 kcal/kg of gross energy significant different among other group of Arachis glabata (P<0.05). Experiment 2 was conducted to study on ruminal degradability of Arachis glabata using In situ technique in dairy cattle. The experimental design was Randomized Completely Block Design (RCBD) experiment with three treatments. Each treatment consisted of three blocks (three ruminally fistulated dairy cattle) and followed different three variety of Arachis glabata as Cv. Florigraze Cv. Arbook and Cv. Ecotart. Results showed that Arachis glabata Cv. Florigraze and Arachis glabata Cv. Arbook was grater dry matter organic matter and protein degradability at 0-4 hour and 24-28 hour than Arachis glabata Cv Ecotart (P<0.05). In addition kinetic of degradation (a b c and p) of dry matter organic matter and protein were not significant different (P>0.05) among three variety of Arachis glabata.

An experimental design was a completely randomized design (CRD). Fifteen Thai native cattle were randomly allocated into 5 treatment groups with 3 animals in one group and one cattle was one replication assigning to be fed with various roughages: (1) fresh Napier grass (NP) (2) fresh oil palm fronds (OPF) (3) oil palm fronds silage (4) OPF silage with 2% of molasses and (5) NaOH treated OPF (1.5% by weight OPF). All treatments were supplemented with concentrate feed consisting of 14% of crude protein at the rate of 1% of live weight (BW). The experimental period was 120 days. The data were analyzed with analysis of variance and mean comparisons among treatments were Duncan’s multiple range test (DMRT). The results showed that no significant differences (p>0.05) were observed among 5 treatments in feed intake of dry matter digestibility of crude protein digestibility of neutral detergent fiber feed conversion ratio and growth rates. However the lowest production cost for 1 kg gain was obtained from the cattle fed with NaOH treated OPF.