Rapeseed cake is a good protein feed, but rapeseed cake contains glucosinolates, which produces toxic substances in chickens, and it is spicy and unpalatable. Therefore, the following issues should be noted when using it:
The amount of feed should be appropriate: In chicken diets, the proportion of colza cake should not be too high. In general, the amount of growing chicken can account for 5%-10% of the concentrate and 5%-8% of dry matter. This can be used with other feeds without detoxification. Of course, different types of rapeseed contain a large difference in the amount of glucosinolates. The actual amount of glucosinolates should be increased or decreased according to local rapeseed varieties, oil extraction technology, and soil sulphur content.
Detoxification necessary for the safe use of rapeseed cake, especially in the chicken diet when the amount of rapeseed cake exceeds 10%, the necessary detoxification treatment should be carried out. Common methods: pit burying method. This method should avoid the rainy season and high temperatures. Choose a place with high dry terrain and good soil (not under the tree). Dig a 0.8-meter-wide, 0.8-meter-thick, rectangle-shaped pit with a length determined by the amount of rapeseed cake, and lay a 3 cm-thick wheatgrass inside and crush it to the end. The rapeseed cake was immersed in water in a 1:1 ratio, buried in a pit, covered with a thin layer of straw, and then covered with 40 cm of soil. Open drains around to prevent rain from seeping. After two months, you can use it. Pay attention to the portion where moldy agglomeration is not suitable for feed. This method requires no other equipment and the detoxification rate is above 90%. Cooking method. In small-scale feeding, the crushed rapeseed cake can be soaked in warm water for 8-12 hours, then the water is poured, and then water is added for boiling for 1 hour.
Feeding green feed: Feeding green feed can improve the palatability of the whole feed and reduce the poisoning effect of rapeseed cake, but it is not appropriate to feed cruciferous plants rich in mustardase, such as cabbage, radish, and cabbage.
To prevent poisoning: The use of moldy rapeseed cakes for feeding chickens is prohibited. Stir the ingredients thoroughly so that some chickens do not eat too many rapeseed cakes and cause poisoning.
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