Grain specifications and suppliers Lupins are mostly design to feed the world PDF by stockfeed manufacturers in compound feed rations. Ruminants are the biggest users followed by pigs and poultry. There is increasing utilisation in aquaculture and for human food where they are valued for both their nutritional and functional properties.
The nutritional value of the different lupin species varies which has implications for end-use. All species are largely free of anti-nutritional factors. Lupins store well, are easy to handle. Australia is currently the biggest supplier. Lupins have a typical dicotyledon structure. This is considerably higher than for most domesticated grain species. There is virtually no starch in any of the lupin species.
Proximate analyses for whole grain of the major domesticated species, and the Andean lupin, are shown in Table 1. In Australia lupin grain is traded on the basis that it contains less than 0. Lupins are widely used as a source of protein and energy in livestock feeds. Their high protein content makes them a valuable resource for monogastric and ruminant production systems as they are cost competitive with a wide range of other protein sources. Their low levels of starch and high levels of fermentable carbohydrate make them a highly desirable ruminant feed due to the low risk of acidosis. The comparatively high levels of soluble and insoluble non-starch polysaccharides can influence the utilization of other nutrients in lupins and hence they must be used strategically if livestock production responses are to be optimized. In addition, comparatively low levels of the sulphur amino acids, methionine and cystine, influence the way lupins are used in livestock diets.
Lupins also store well, are easy to handle and are readily accepted by most stock. They are largely free of anti-nutritional factors such as trypsin inhibitors, lectins and saponins. In monogastrics the complex carbohydrate profile is the main constraint to use as it influences the net energy yield, and has been shown to affect the utilisation of other nutrients in the diet. Although lupins are relatively high in protein, the biological value of the protein is limited by a relatively low in methionine and lysine. However, low levels of methionine and lysine are of little or no consequence to ruminants where the protein is mostly ruminant fermented. In pig and poultry diets these shortfalls can be made up from other proteins or synthetic amino acids.
The Chemical Composition and Nutritive Value of Australian Pulses. Removing the hull improves the value of lupins for monogastrics and fish, but inclusion rates of kernel meal into pig and poultry diets is limited by the level of non-starch polysaccharide. Desirable handling and storing attributes due to the robust seed coat. A significant proportion of the lupins imported by Japan also goes into beef production. By far the greatest form of lupin utilization in Australia is as a whole-grain feed for grazing sheep, to supplement low grade roughage diets.
Responses vary depending on the quality of the forage on offer. The efficiency of utilisation of lupin grain varies from liveweight change of 0. Milk production by dairy cows fed hammermilled lupin grain, hammermilled oaten grain or whole oaten grain as supplements to pasture. Australian Journal of Experimental Agriculture 29: 309-313. Favourable results have been reported from substituting soybean meal for L.
Nutritional value of grain legumes for ruminants. Monogastrics Pigs and poultry do not have a requirement for crude protein per se but, rather for specific levels of individual amino acids. Despite this, crude protein level is often used as a guide to the amino acid content of lupins, rather than direct amino acid analysis. Hence, variation in crude protein content can affect the efficiency of use of lupins in pig and poultry diets.
Based on existing data and commercial experience, the maximum inclusion levels of L. However in practice, broiler chicken diets inclusion of either L. This is due to the incidence of wet-sticky droppings that may be promoted by high levels of lupin non-starch polysaccharides. Poultry rations normally contain less than 10 per cent lupins, frequently kernels, because of the problem of “sticky” or “wet” droppings. While aesthetically undesirable and a potential health risk to the birds, through respiratory stress from ammonia and coccidiosis, this is not known to affect feed conversion. There is some evidence that the addition of commercial enzymes to poultry feed will improve the energy utilisation and reduce the incidence of “sticky” droppings. The demand for alternative protein resources to fishmeal in aquaculture diets has stimulated substantial interest in the potential of lupins.
Some major international feed companies are routinely using lupin kernel meal in their formulations. The salmonid and prawn feed markets have been identified as two key prospective markets for value added lupin products. Clear nutritional advantages of dehulling lupins were observed irrespective of lupin species evaluated. Improvements were seen in the digestibility of dry matter, nitrogen and energy on dehulling. Seeding a Future for Grains in Aquaculture Feeds- Part II. The digestibility of protein of all lupin kernel meals is generally better than that of the soybean meal.