With less hay, crude protein and other nutrients are in short supply, coupled with low temperatures and high energy consumption in the carcasses, the ewes’ demand for nutrients due to pregnancy, breastfeeding, long hair, and long velvet increases. It is far from meeting its nutritional needs and must be supplemented by supplementary feeding. For the main nutrient-limiting factors for grazing, the following methods can be used for supplementation.
1. The nitrogen source commonly used for supplementing nitrogen sources is urea. The amount of nitrogen supplied is no more than 1% of the dry matter of the sheep's diet or 2%-3% of the amount of 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. If sheep poisoning caused by improper feeding of urea, can be fed a lot of cold water or moderate amounts of dilute acetic acid, yogurt, vinegar, etc., and conditions can be fed to the sheep 10% of acetic acid plus glucose mixture of 1.5-2 liters.
Second, the use of rumen technology to feed through the 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 feeding or salt bricks, mineral pellets, and sustained-release devices.
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