ABSTRACT The use of alternative herbage types such as herb-clover mixes and lucerne can improve the weaning weight of twin and triplet lambs born to mature ewes and single lambs born to ewe hoggets. The aim of this study was to compare the live weights of twin bearing ewe hoggets and their progeny grazed on either ad libitum permanent pasture (ryegrass white clover), lucerne or plantain-clover during lactation over two years. In both years of the study, twin bearing hoggets and their lambs grazed on lucerne or plantain-clover were heavier at weaning than those on pasture. Lambs grazed on lucerne had greater live weights at weaning than plantain-clover, however, among ewe hoggets differences were seen only in the first year of the study. In conclusion, both lucerne and the plantain-clover resulted in increased mean live weights of ewe hoggets and their lambs at weaning compared with those on pasture.

中文翻译：

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三种牧草类型对双胎猪及其羔羊体重变化的影响

摘要 使用替代牧草类型，如草本三叶草混合物和苜蓿，可以提高成熟母羊所生双胞胎和三胞胎羔羊以及母羊小猪所生单羔羊的断奶重量。本研究的目的是比较在哺乳期间两年内在随意放牧的永久性牧场（黑麦草白三叶草）、苜蓿或大蕉三叶草上放牧的双胎母羊小猪及其后代的活重。在两年的研究中，在苜蓿或大蕉三叶草上放牧的双胞胎小猪和羔羊在断奶时比在牧场上吃草的羊重。在苜蓿上放牧的羔羊断奶时的活重比车前草高，然而，母羊之间的差异仅在研究的第一年出现。综上所述，