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玉米是世界上重要的粮食作物,也是一种被广泛使用的高能量畜禽饲料,在国民经济中占有一定的位置。衡量玉米的营养价值,既要考虑蛋白质的含量,也要看其蛋白质的品质。而蛋白质的品质又取决于蛋白质所含氨基酸种类,以及所含必须氨基酸是否平衡,是否能被人畜吸收利用。普通玉米中含蛋白质10％左右,其中醇溶蛋白占59％,不能被利用;原因主要是缺少赖氨酸所引起的。赖氨酸是人体必须的氨基酸,而缺乏赖氨酸又是所有谷物的共性。
Corn is an important grain crop in the world and a widely used high-energy livestock and poultry feed, occupying a certain place in the national economy. Measuring the nutritional value of corn, it is necessary to consider the protein content, but also depends on the quality of their proteins. The quality of the protein depends on the type of amino acids contained in the protein, as well as the essential amino acids contained in the balance, whether it can be absorbed by humans and livestock. Normal corn contains about 10% of the protein, of which gliadin accounted for 59%, can not be used; the main reason is the lack of lysine caused. Lysine is the body’s essential amino acids, and the lack of lysine is the commonality of all grains.