In-Sacco Degradability of Various Legume-Tree Leaves from Limestone and Non-Limestone Areas in Malang



Hartutik Hartutik(1*), M. Soejono(2), Kustono Kustono(3)

(1) Family of Animal Husbandry, Brawijaya University, Malang, Indonesia
(2) Faculty of Animal Science, Gadjah Mada University, Yogyakarta Indonesia
(3) Faculty of Animal Science, Gadjah Mada University, Yogyakarta Indonesia
(*) Corresponding Author

Abstract


This research aimed to determine the dry matter (DM), organic matter (OM) and crude protein (CP) degradation in sacco of various legume tree leaves from limestone and non - limestone areas in Malang. Five samples of legume tree leaves
namely :leucaena, calliandra, gliricidia, sesbania and erythrina were incubated at 0,4,3,l2,16,24, and 43 hours in the rumen of three fistulated fat-tail sheep
(1 28,4 kg live weight, the pH of the rumen fluid 6,8 and NH3 3,43 mM). Those fistulatcd animals were fed the anmioniated rice straw freely (CP 11,7%, DM intake 633,1 g) and susu PAP concentrate (CP 18,3% , DM intake 268,0 g). The formula that has been used to calculate the DM, OM and CP degradability at the time "t” is expressed aszp = a + b (1 - e'°‘) for t_0, the similar modified formula has been used this experiment expressed that 1 (a' + b‘) = the potential degradability of the feed; a‘ constant = the feeds that loss during washing; b‘ constant = (a+b) - a‘; c‘ constant = the degradation rate. The result of this experiment showed that the locational factor gave a higly significant (P<0,01) effect to a value at DM (39,5% and 38,3%) and CP (44,0% and 40,3%); b‘ at CP (29,1% and 35,2%), but not
significant either to a‘ at OM; b‘ at DM and OM; (a'+ b‘) and c‘ at DM, OM and CP. Based on those result it could be said that the locational factor do not affect the degradability differently. The legume-trce leaves taken from two location showed a
significant response (P<0,05) to the a‘ , b’, (a'+ la‘) and c‘ values at DM, OM and CP. lt can be concluded that the rank-order of legume tree leaves from two locations were sesbania, gliricidia, erythrina, leucaena and calliandra. Sesbania was the best. The low degradation rate of leucaena and calliandra possibly associated with the relatively high content of tannin. In purpose of supplementations of low quality basal-diets, it is recommended to offer sesbania, gliricidia or erythrina leaves.


Keywords


Limestone and Non-Limestone Areas, Legume Tree, In Sacco, Leaves, Degradability

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