1, sowing method and sowing amount, in most areas, the row spacing is 30cm, which is beneficial to ventilation and light transmission and field management. The sowing amount is generally around 1kg/ mu, with less farming and more saline-alkali land. If the sowing amount is too large, the seedlings will be sparse. Sowing depth is the key to affect the quality of seedling emergence, which is generally too deep, and the optimal depth is 0.5- 1cm.

2. Weeding is one of the main contents of alfalfa field management. One is at the seedling stage, and the other is after the summer harvest. Because alfalfa grew weakly in these two periods, it was seriously harmed by weeds, especially after summer harvest, weeds grew rapidly in synchronization with water and heat. No matter what method is adopted, it should be standardized in time. Choose herbicides carefully to avoid poisoning livestock.

3. Alfalfa needs a lot of water for irrigation and drainage, and 800L water is needed to produce lkg dry matter. Water before winter, after turning green and during drought. Attention should be paid to drainage in rainy season in coastal and low-injection areas, and alfalfa will die after 24 hours of flooding.

4. Pests and diseases control During the growth of alfalfa, it is necessary to control pests and diseases in time, otherwise it will affect the yield and quality. Insecticides such as cartap, dimethoate and fenvalerate are generally used to control pests, such as rust, brown spot and downy mildew, and carbendazim and thiophanate-methyl are used to control pests.