In spring, there is less grass, and the supply of crude protein and other nutrients is seriously insufficient. In addition, the temperature is low and the energy consumption of the carcass is high. The demand for nutrition of the ewes due to pregnancy, breastfeeding, long hair and long cashmere is increased. It is far from meeting its nutritional needs and must be supplemented by supplemental feeding. For the main nutritional constraints of grazing, the following methods can be used for supplement feeding.
nitrogen source
The commonly used nitrogen source is urea, which feeds no more than 1% of the dry matter of the sheep diet, or 2% to 3% of the feed of the concentrate. The specific feeding amount of urea depends on the amount of energy feed in the sheep diet. Generally, the energy feed can be fed more often, and less when the energy feed is less. Urea must be fed with digestible concentrate or a small amount of molasses, appropriate amount of sulfur and phosphorus, can not be fed with bean cake and alfalfa, and can not be used to feed sick and starved sheep. Poisoned. When using, the urea should be sprinkled in the moist concentrate to make it dissolve evenly. It is forbidden to dissolve in water or feed alone.
Sheep fed the urea diet should not drink water immediately, so it is advisable to drink water after two hours of feeding. If the sheep is poisoned due to improper feeding of urea, a large amount of cold water or an appropriate amount of dilute acetic acid, yoghurt, vinegar, etc. can be administered, and the sheep can be fed with 10% acetic acid plus glucose mixture 1.5-2 liters.
Using rumen supplement
Feeding rumen protein and ruminal starch can increase the feed intake of sheep and promote the absorption of amino acids in the small intestine, thereby increasing hair production and milk production.
Increased fermentation can supplement the
Cereals such as barley, wheat, oats, corn, and sorghum, which contain too much starch, can increase the fermentation energy of the diet and increase the utilization rate of the roughage by the sheep.
Supplemental silage
Supplementing a small amount of silage corn during the dry grass stage can promote the growth of rumen microorganisms in sheep and improve the utilization of roughage.
Supplementary minerals
The mineral elements calcium, phosphorus, sodium, potassium, selenium and copper that may be lacking in sheep can be supplemented by mixed feeding or salt bricks, mineral pills and slow release devices.
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