In order to evaluate the nutritive value of Japanese lawn grass (
Zoysia japonica Steud.), its chemical composition, fractions by enzymatic analysis, acid detergent fiber (ADF) and lignin content were analyzed. The digestibility of each item was also determined from digestion trials repeated 3 times for each of 2 Japanese-type bucks. The chemical composition of Japanese lawngrass shown as a percentage on a dry-matter basis was as follows: crude protein(CP):9.1, ether extract (EE):2.2, crude fiber (CF):24.9, nitrogen-free extract (NFE):59.0, crude ash:4.8%, respectively. Fractions by enzymatic analysis and ADF were as follows, organic cellular content (OCC):17.4, organic cell wall (OCW):77.8, soluble fraction of cell wall by cellulase, i. e. organic "a" fraction (Oa):2.8, residue fraction of cell wall by cellulase, i. e. organic "b" fraction (Ob):75.0, ADF; 32.0, lignin:5.7%, respectively. The digesibility of chemical components, fractions by enzym treatments, ADF and lignin of Japanese lawngrass were as follows, CP:20.2, EE:32.1, CF:52.5, NFE:49.5, OCC:74.1, OCW:45.2, Oa:84.9, Ob:43.7, ADF:43.7, lignin:9.45%, respectively. The digestible crude protein (DCP), total digestible nutrients (TDN) and metabolizable energy (ME) of Japanese lawn grass were 5.0, 48.9% and 1.74Mcal/kg on a dry-matter basis, respectively. Although Japanese lawngrass had less highly digestible fractions of carbohydrate and also had lower digestibility of the fractions than those of mature Italian ryegrass hay, it was inferred that its nutritive value from the point of view of TDN and DCP was not inferior to mature Italian ryegrass hay.
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