Alfalfa is one of the world's most famous forages and the largest cultivated area in China. It has the reputation of “King of Pastureâ€. It not only has high grass yield, but also has excellent grass quality. It is also rich in crude protein, vitamins and inorganic salts. It feeds for livestock, poultry and herbivorous fish and has a high feeding value. At the same time, due to the development of root nodules in the alfalfa, which can fix nitrogen in the air, it is also a very good soil and water conservation and soil improvement fertility plant. In the development of ecological agriculture, sustainable development of agriculture, more and more people's attention. This article briefly describes the cultivation techniques of alfalfa and its value in animal husbandry. I. Cultivation techniques 1. Sowing time. It can be planted in spring, summer and autumn. Soils with good soil moisture and less wind and sand hazard are suitable for spring sowing. Summer sowing is generally planted from mid-April to late May. However, summer sowing is vulnerable to weeds and weed control should be emphasized. Autumn sowing is conducted from mid-August to mid-September. Seeding at the end of the day, when the soil moisture is good, the weeds are harmed lightly, and the emergence and seedling rate are higher. At present, more are used. 2. Sow. The seeds of alfalfa are small, fine soil preparation is required before sowing, and the soil moisture content is maintained. In the poor soil, appropriate amount of manure and phosphate fertilizer should be applied as base fertilizer. Drilling is generally used, with a row spacing of 30-40 cm, a seeding depth of 1-2 cm, and a seeding rate of 1 to 1.50 kg per mu. 3. Management. Before sowing, the soil should be applied with farm manure (about 3,000 kg per mu) and basal fertilizer with phosphorus and potassium fertilizer (about 40 kg per mu). Afterwards, every time when harvesting, the irrigation fertilizer (mainly NPK fertilizer, about 30 kg per mu) will be applied. 1 time to improve pasture quality. Although alfalfa has a certain degree of drought resistance, irrigation in the dry season can greatly increase the amount of grass production. Pre-winter irrigation is beneficial to the wintering of the plants; irrigation in early spring and irrigation after each harvest are very significant to increase the amount of grass production. The pests that erode alfalfa mainly include aphids, thrips, floating dusts, and blind stink bugs. They can be used to prevent and treat dimethoate, dichlorvos and other sprays. For downy mildew and brown spot diseases, thiophanate-methyl and carbendazim can be used for prevention and control. The timing of harvesting is at the early flowering stage. At this time, it has good palatability, high digestibility, and high nutrient content. In general, 4 to 5 stubs can be harvested each year, and about 5 cm in length after each harvest for regeneration. The methods of preparation of alfalfa hay include natural drying method (cooling drying method) and artificial drying method (mechanical drying method). Generally, 1 kg of hay can be prepared for every 4 to 5 kg of fresh grass. Second, nutritional value and feeding value Alfalfa is rich in nutrition, good palatability, all kinds of livestock are fond of food, can be fed green, can also be prepared hay or processed into grass powder mixed feed, is a good animal protein and vitamin supplement feed. It has been determined that the crude protein contained 15% to 25% of crude protein, 1.05% to 1.38% of lysine, and is rich in carotene, vitamin B, and yellow pigments. In particular, the crude protein contained in the loquat leaves was 1 to 1.50 times higher than in the stem, and 50% less fiber. Alfalfa green feeding is a common feeding method, but the nutritional value of alfalfa has a great relationship with the growth stage and harvesting time. Therefore, it is necessary to choose the best harvesting period, that is, the value of green feeding after harvesting at the early flowering stage is the highest. When feeding, it is best to mix with grass, because the grass contains a lot of saponin, can produce continuous foam in the ruminant's rumen, making it produce gas to produce rumen swelling. After dried alfalfa is made into grass powder, it can be added to the diet of livestock and poultry in a proper proportion, which has little impact on the production performance of livestock and poultry, and thus can reduce the cost of raising livestock and poultry. Addition of 1% to 2.50% to the diet of the chicks before 6 weeks of age, from the 7th week to 2.50% to 5% during the laying period, and from 1.50% to 2% for the broilers; growth and finishing pigs may account for the diet 5%~15% of sows account for more than 10%; rabbit diets can reach 40%~70%, and cattle and sheep diets can reach up to 50%~80%. Third, the impact of the quality of livestock and poultry products 1. Chicken. Since alfalfa meal contains up to 240 mg/kg lutein (more than 10 times that of yellow corn), it makes the egg yolk darker and is very popular with the market. According to reports, adding 5% of alfalfa meal in layer diets can result in an egg color index of 9.70, which is 3.40 higher than the non-addition group, and the difference is extremely significant. The addition of Alfalfa meal in broiler diets can significantly improve the color of the broiler's cockroach, claws, and skin in bright yellow, and the meat is delicious, increasing commercial value. In addition, since the alfalfa meal contains more vitamins, especially riboflavin, it can also increase the vitamin content of the eggs in the layer diet. 2. Pigs. Alfalfa grass meal contains high crude protein and is added to the diets of growing pigs at a rate of 5% to 15%, which can increase the lean meat percentage of the carcass without affecting its growth. It has been reported that adding 10% dehydration alfalfa meal to the diets of growing-finishing pigs and rearing at 10°C reduces the thickness of pigs' backflies by 3%. 3. Cows. Alfalfa is a very good quality forage for dairy cows. It not only increases the vitamin content in milk, but also increases milk fat percentage and milk yield. Feeding dairy cows with alfalfa hay and semi-dry silage significantly increased milk production, and the milk fat percentage also increased from 3.43% to 3.52%. Experiments have shown that wolfberry can replace some of the concentrates of dairy cows without affecting milk production and increase milk fat percentage. 5 Ply Earloop Face Mask,Earloop FFP2 Respirator,Earloop Disposable Respirators,Disposable FFP2 Earloop Respirator Henan Aklly Filter Engineering Co., Ltd , https://www.akllyfilter.com