Method for irrigating cultivation wastewater of alfalfa

The invention provides a method for irrigating alfalfa by using breeding wastewater, which comprises the following steps: irrigating alfalfa by using breeding wastewater of a pig farm in a flood irrigation manner, the alfalfa is perennial alfalfa, and the harvest of the alfalfa is not less than three crops each year. According to the alfalfa breeding wastewater irrigation method, perennial alfalfa is irrigated with the breeding wastewater of a pig farm, resource utilization of the breeding wastewater can be achieved, the water cost of alfalfa planting can be reduced, the alfalfa planting cost can be reduced, meanwhile, the alfalfa is irrigated with the breeding wastewater, and the yield of the alfalfa is increased. The yield and quality of the alfalfa can be improved, planting of the alfalfa is facilitated, and therefore the safety of feed grains can be improved. 本发明提供了一种苜蓿的养殖废水灌溉方法，所述方法包括采用养猪场的养殖废水通过淹灌方式对苜蓿进行灌溉，所述苜蓿为多年生的紫花苜蓿，且所述苜蓿每年收获不低于三茬。本发明的苜蓿的养殖废水灌溉方法，通过采用养猪场的养殖废水对多年生的紫花苜蓿进行灌溉，不仅可实现养殖废水的资源化利用，能够降低苜蓿种植的用水