摘要
Diets with foliage of Flemingia (Flemingia macrophylla) or Jackfruit (Artocapus heterophyllus were fed to goats with the objective to study nitrogen (N) balance and effect of a daily supplementation of polyethylene glycol (PEG) on intake and digestion. In experiment 1, three male AlpineJamnapary goats with initial weights varying from 26.9 to 27.7 kg were used in a Latin square design in the dry season. Three AlpineBachthao crosses, 15.3-16.7 kg, were used in the same design in the wet season. The three diets were based on chopped whole sugar cane complemented with the two green foliages, Jackfruit and Flemingia, or soybean meal (SBM). The level of dry matter (DM) offered was 4% of body weight (BW), 2.7% as foliage and 1.3% as chopped whole sugar cane. The amount of SBM offered was calculated to give the same amount of crude protein (CP) as the foliages. Each experimental period lasted 32 days (14 days for adaptation, 7 days for collection and 10 days for rest). Feed intake, apparent digestibility of DM, organic matter (OM), CP, neutral detergent fiber (NDF) and acid detergent fiber (ADF) and retained nitrogen (N) were measured by total faecal and urine collection. In experiment 2, four male goats (AlpineJamnapary) with initial weights from 17.1 to 23.1 kg were used in a Latin square design. The four treatments were Jackfruit or Flemingia with or without addition of PEG, which was fed at a level of 5 g/goat and day by mixing with a small amount of rice bran. Each experimental period lasted 15 days (8 days for adaptation, 7 days for collection). Measurements were done as in experiment 1. The DM digestibility was highest (65.9-74.3%) for goats fed the SBM diet in both the dry and wet season. The DM digestibility of goats fed the Jackfruit and the Flemingia diets was similar in both the dry (58.6-59.2% respectively) and the wet season (53.9-56.1% respectively). The CP digestibility was highest (73.0-73.6%) for the SBM diet followed by the Jackfruit diet (47.0-38.5%) and was lowest (36.8-30.0%) for the Flemingia diet in both dry and wet seasons, respectively. The NDF digestibility was low for both the Jackfruit (36.4%) and Flemingia (38.0%) diets in the wet season. All diets resulted in a positive N balance. The N retention was highest (0.465-0.604 g/kg ) in the SBM diets and lowest (0.012-0.250 g/kg ) in the Flemingia diet. Addition of PEG had no effect on feed intake for any of the diets. PEG added in the Flemingia diet had a positive effect only on NDF digestibility, but the digestibility of the Jackfruit diet was significantly increased. Supplementation with PEG reduced digestibility and N retention of Flemingia, possibly because of the low tannin level, but increased digestibility and N retention for Jackfruit foliage.
摘要译文
lla）或菠萝蜜（Artocapus heterophyllus饲喂山羊，目的是研究氮（N）平衡和每日补充聚乙二醇（PEG）对摄入和消化的影响。在实验1中，在旱季使用拉丁方设计的三只雄性AlpineJamnapary山羊，其初始重量从26.9到27.7kg不等。三个AlpineBachthao十字架，15.3-16.7公斤，在雨季使用相同的设计。这三种饮食都是以切碎的全甘蔗为基础，辅以两种绿叶，菠萝蜜和弗莱明，或豆粕（SBM）。提供的干物质（DM）水平为体重（BW）的4％，叶子为2.7％，切碎的全甘蔗为1.3％。计算所提供的SBM的量以得到与叶子相同量的粗蛋白质（CP）。每个实验期持续32天（适应期为14天）收集7天，休息10天）。饲料摄入量，DM的表观消化率，有机物（OM），CP，通过总粪便和尿液收集来测量中性洗涤纤维（NDF）和酸性洗涤纤维（ADF）和保留的氮（N）。在实验2中，在拉丁方设计中使用了四只雄性山羊（AlpineJamnapary），初始重量为17.1至23.1千克。四种处理方法是菠萝蜜或Flemingia，添加或不添加PEG，通过与少量米糠混合，以5g /山羊和白天的水平加入。每个实验期持续15天（适应8天，收集7天）。测量如实验1中那样进行。对于在干燥和潮湿季节喂食SBM饮食的山羊，DM消化率最高（65.9-74.3％）。饲喂菠萝蜜和弗莱明氏饮食的山羊的DM消化率在干燥（分别为58.6-59.2％）和湿季（分别为53.9-56.1％）方面相似。在干燥和潮湿的季节，对于SBM饮食，其次是菠萝蜜饮食（47.0-38.5％），CP消化率最高（73.0-73.6％），而Flemingia饮食的CP消化率最低（36.8-30.0％）。在雨季，菠萝蜜（36.4％）和弗莱明（38.0％）饮食的NDF消化率都很低。所有饮食都导致N平衡。 N保留率最高（0.465-0。在SBM饮食中为604g / kg），在Flemingia饮食中为最低（0.012-0.250g / kg）。添加PEG对任何饮食的采食量没有影响。在Flemingia饮食中添加的PEG仅对NDF消化率具有积极作用，但是菠萝蜜饮食的消化率显着增加。补充PEG降低了Flemingia的消化率和N保留，可能是因为单宁水平低，但菠萝蜜叶片的消化率和N保留率增加。
Mui, Nguyen Thi; Ledin, Inger; Uden, Peter; Binh, Dinh Van;. Nitrogen Balance in Goats Fed Flemingia (Flemingia Macrophylla) and Jackfruit (Artocarpus Heterophyllus) Foliage Based Diets and Effect of a Daily Supplementation of Polyethylene Glycol (PEG) on Intake and Digestion[J]. Asian-Australasian Journal of Animal Sciences, 2002,15(5): 699-707