No abstract

A research programme was undertaken over two consecutive years with the purpose of studying the effect of herb-clover swards on lamb production performance year-round. The focus of this study was on two consecutive late spring and early summer periods (2011, 2012). In each year, three sward treatments were compared on grazed paddocks with 40 lambs ha À1 : (i) grass-clover mixture (perennial ryegrass [Lolium perenne L.] and white clover [Trifolium repens]); (ii) plantain-clover mixture (plantain [Plantago lanceolata], white clover and red clover [Trifolium pratense]); and (iii) chicory-plantain-clover mixture (plantain, chicory [Cichorium intybus L.] and white and red clovers). Lambs were weighed at 2-week intervals, and carcass weights and GR tissue depth measurements were obtained at slaughter. In both years, lambs on treatments (ii) and (iii) had greater (P < 0Á05) final live weight, liveweight gain, carcass weight, dressing-out percentage and GR tissue depth measurements, and lower feed conversion ratio compared to lambs on treatment (i). Lamb production was similar in treatments (ii) and (iii) (P > 0Á05) in each year. Therefore, during the late spring and early summer period, herb-clover mixture swards were found to be a superior option to perennial ryegrass-white clover for finishing lambs.

This research aims to find out the feasibility of the formation of different total mixed ration (TMR) briquettes. Six recipes (TMR1, TMR2, TMR3, TMR4, TMR5, and TMR6) were prepared by blending different combinations of forages and concentrates to balance the nutrient requirements of lactating dairy cows. Each TMR briquette was wrapped and stored at room temperature for three months and tested at monthly intervals for nutrient composition and shelf life. A cost analysis was performed to determine economic feasibility. The crude protein, ether extract, crude fibre, acid detergent fibre, neutral detergent fibre, nitrogenfree extract and non-fibre carbohydrate contents were not significantly different among the treatments at preparation and after 3 months of storage. Calcium, phosphorous and magnesium contents of the treatments were significantly different among the treatments at preparation and after three months of storage.There was no risk associated with the potentially toxic metals (Cd, Pb and Hg) in the treatments during the storage. Yeast & mould counts, total plate counts and free fatty acid contents were in the acceptable range in all treatments during the entire storage period. Weights of the briquettes were significantly decreased during the storage; however, heights were not different among the treatments.TMR5 and TMR6 resulted lower production costs per kg. The majority of the nutritional, shelf life and physical parameters were not significantly different among the six TMR recipes tested. Thus, 5 and 6 TMR briquettes were selected as the best two potential recipes for further studies.