The Feasibility and problems of replacing Soybean meal with Miscellaneous meal

2 several problems that should be paid attention to in place of soybean meal in diet 2.1 adjust palatability in plant protein feed, except soybean meal and peanut meal, the protein feed of other processed by-products is poor in palatability due to the existence of odor, color or toxic and harmful substances, and should be adjusted according to specific raw materials in production, such as adding a certain amount of colorant or food attractant to the feed. 2.2 pay attention to the balance and supplement of amino acids, especially the nutritional essence of lysine livestock and poultry protein is the nutrition of amino acids, the balance and proper amount of amino acids, especially the balance of lysine, methionine and tryptophan. It is the key factor affecting the level of animal production. In the best formula of corn + soybean meal + fish meal, corn lysine is deficient, but soybean meal contains high lysine and fish meal is rich in methionine, which can make up for the methionine deficiency of soybean meal. Therefore, if only the "pig corn + soybean meal" diet is simply replaced with "corn + peanut meal" diet, the protein can be satisfied, but the lysine deficiency is 0.53%, and the daily gain of piglets is reduced from 540 g to 250 g. After adding 0.53% lysine, the daily gain can only be increased to 420 g, because there are other amino acid imbalances. Therefore, the replacement of soybean meal is not a simple replacement, only on the basis of ensuring the balance of all amino acids in the diet, the replacement of soybean meal can not affect the production level of livestock and poultry. 2.3 protein and amino acid digestibility are very different among different protein raw materials. For example, compared with cottonseed meal and rapeseed meal, the protein digestibility of soybean meal is 87%. The digestibility of cottonseed meal and rapeseed meal is only a little more than 70%. The amino acid digestibility of soybean meal is 87%, and the digestibility of cottonseed meal and rapeseed meal is 68% and 60% respectively. Using cottonseed meal and rapeseed meal instead of soybean meal, except for lysine deficiency, the difference in protein digestibility was more than 15%. The difference in amino acid digestibility is more than 20%. It can be seen that when using other protein feed resources instead of soybean meal, the level of protein and amino acid in diet should be slightly higher than that of soybean meal diet because of its low digestibility of protein or amino acids. -good study.-study, not bad.-study. Collection.-Thank you. Learn again.-the key is digestibility and palatability! Personal opinion: the formula is designed in the ideal protein mode, designed with available amino acids, and is appropriately limited according to the characteristics of the raw materials. The soybean meal-free diet is no longer an advanced thing-agree with the point of view upstairs-well, post more of these basic posts, thank you, landlord-learn. -good.-good introduction. Miscellaneous meal should have replaced soybean meal a long time ago.-good, everyone is using it slowly.