国外很重视从天然草场向人工草场发展,提高牧草利用率,原天然草场要10—15亩养一只绵羊,人工草地则需2—3亩养一只绵羊。为提高土地生产力及产草量,国外采用综合技术进行草地建设。 1 进行土壤普查。在欧美等国是每隔3—5年进行一次普查,朝鲜每10年中进行三次土壤普 Abroad attaches great importance to the development of artificial pasture from natural pastures to improve the utilization rate of pasture, the original natural pasture to raise a sheep 10-15 acres, artificial grass will need 2-3 acres to raise a sheep. In order to increase land productivity and grass production, foreign countries use integrated technologies to carry out grassland construction. 1 Conduct a soil census. In Europe and the United States and other countries every 3-5 years to conduct a census, North Korea every 10 years for three times the soil P