Alfalfa not only has high forage yield, but also has high forage value and good palatability. It is loved by all kinds of livestock all year round, and fresh grass or various alfalfa products are also loved by all kinds of livestock and poultry. It is rich in nutrition, which not only contains protein, minerals and vitamins, but also contains amino acids and trace elements necessary for the growth and development of livestock. According to the determination, the protein content of alfalfa leaves is 1 ~ 1.5 times higher than that of stems, and the crude fiber is about 50% less than that of stems. The younger the plant, the greater the proportion of leaves and the higher the nutritional value. The chemical composition content and nutritional value of alfalfa vary with varieties, growth periods and cultivation conditions. According to the analysis of Grassland Research Institute of China Academy of Agricultural Sciences (1990), in the growth stage of workers and peasants 1 alfalfa, the crude protein content at seedling stage accounts for 25.55% of absolute dry matter, and crude fiber only accounts for 23.68%. In reproductive stage and flowering stage, crude protein decreased to 65438 08.29%, and crude fiber increased to 44.29%.
Chemical Composition and Nutritional Value of Alfalfa
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Alfalfa is rich in amino acids, but it changes with different growth stages. According to Zhai Guiyu's analysis (1990), there are as many as 17 kinds of amino acids in Huaiyin alfalfa, and the amino acid content in full flowering stage is obviously higher than that in other periods.
Changes of Hydrogen Acid Content of Alfalfa in Huaiyin at Different Growth Stages (%)
Among feed crops, alfalfa has the highest feeding value. Compared with other forages, planting alfalfa on the same land area has the most nutrients, the digestible total nutrients are 2 times higher, the digestible protein is 2.5 times higher and the minerals are 6 times higher. Compared with other food crops, the nutrient yield per unit area is also higher. The yield of alfalfa protein is 65438 0.3 times, which is 0.3 times that of soybean protein and 3.57 times that of millet protein. The total nutrient yield of alfalfa is 2.5 times higher than that of soybean and 0. 15 times higher than that of millet.