狼尾草台畜草三號及二號品種對乳羊泌乳性能之影響評估

本試驗旨在評估不同品系（台畜草三號及二號）狼尾草之牧草品質，進而對乳羊的採食量及泌乳性能之影響。選取32頭泌乳初期平均體重48 kg、乳量2.55 kg之努比亞羊，分成二組，每處理組16頭，試驗日糧採用狼尾草三號品系及二號品系為芻料來源，在乾基33％分別調配而成完全混合日糧。經一週預備試驗後，進行60天飼養試驗。試驗結果顯示乾物採食量、乳產量、4%脂肪校正乳及乾物採食量／體重上，狼尾草台畜三號組皆顯著高於狼尾草台畜二號組（P＜0.05）。在乳組成方面，乳脂率、乳蛋白率、乳糖及總固形物，台畜三號組皆顯著高於台畜二號組（P＜0.05），而無脂固形物及體細胞數，在處理間並無顯著差異。在體重及胸圍變化方面，處理間雖無顯著差異，但台畜三號組之乳羊體重比二號組較重。

關鍵字

狼尾草；泌乳性能；乳羊

並列摘要

The experiment was to asses the quality of Napiergrass Taishigrass strains (No.3 and No.2) as roughage for lactating goats. A total of thirty-two Nubian lactating goats were selected in early lactation with an average body weight of 48 Kg , and producing average 2.55 Kg of milk daily. The goats were divided into two groups by average milk production and body weight and assigned to two different mixed rations. The diets were formulated to fix Napiergrass Taishigrass strains (No.3 and No.2) at 33% of total mixed ratio on dry matter basis. After a 1 week adaptation, the feeding period lasted for 60 days. The results indicated that the daily dry matter intake of feed , milk yield, 4% fat-corrected milk and dry matter intake / body weight for the goats fed Napiergrass Taishigrass No.3 strains diet were significantly higher than those fed the Napiergrass Taishigrass No.2 strains diet (P＜0.05). The milk composition (milk fat, milk protein, lactose and total solid), for the goats fed Napiergrass Taishigrass No.3 strains diet was significantly higher than those fed the Napiergrass Taishigrass No.2 strains diet (P＜0.05). During the experimental period, there were no difference on non fat solids and somatic cell count between the treatments groups. No difference was found on the body weight and chest circumference change ratio of goats. Nevertheless, goat weight fed the Taishigrass No.3 strains diet were heavier than the Taishigrass No.2 strains diet.

並列關鍵字

Napiergrass ； Lactating performance ； lactating goats

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