During the winter and spring season, there are few grass litters, and there is a serious shortage of nutrient supply such as crude protein. At this time, the temperature is low, and the energy consumption of the carcass is high. The ewes' demand for nutrition due to pregnancy, lactation, long hair, and long velvet increases. Grazing alone is far from meeting its nutritional needs and must be supplemented by supplementary feeding.
1. The nitrogen source commonly used for supplementing nitrogen sources is urea, which does not exceed 1% of the dry matter of the sheep's diet, or 2% to 3% of its concentrate feed. The specific feeding amount of urea depends on the amount of energy feed in the sheep's diet. Generally, the energy feed can be fed for a long time, and the feed for energy can be fed less when the energy feed is low. Urea must be fed with digestible concentrate or a small amount of molasses, moderate amounts of sulphur and phosphorus, and fed in small amounts one after another. It cannot be fed with bean cakes or quail, nor can it be used to feed sheep that are in conditions of disease and starvation. Poisoning. When using, urea should be sprinkled in the wet concentrate to make it evenly dissolved. It is forbidden to be dissolved in water or fed separately. Sheep fed a urea diet cannot drink water immediately, and it is advisable to drink water after stopping feeding for two hours.
Second, the use of rumen feed supplement rumen protein and ruminal starch can increase sheep feed intake, promote intestinal absorption of amino acids, thereby increasing the amount of hair production and milk production.
Third, increasing the amount of starch-enriched barley, wheat, oats, corn, sorghum and other grain feeds can increase the fermentation energy of the diet and increase the sheep's utilization of roughage.
Fourth, supplement feeding silage supplemented with a small amount of silage corn in the withered period can promote the growth of the rumen microorganisms in sheep, and improve its utilization of roughage.
V. Mineral supplements Mineral elements such as calcium, phosphorus, sodium, potassium, selenium, and copper, which may be lacking in sheep, may be supplemented by mixed feeds or salt bricks, mineral pellets, and sustained-release devices.
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