Objective: To determine the pregnancy rate (PR) in goats with natural and synchronized estrus after artificial inseminat......

[目的] 提高羊只的生产性能.[方法] 根据母羊的泌乳曲线和羔羊的生长发育规律,配制标准营养水平(试验1组)和低于标准营养水平15%(......