澳洲进口冻精对北京荷斯坦牛繁殖效果的研究 / Study on Reproductive Effect of Frozen Semen Imported from Australia on Beijing Holstein Cattle
- Resource Type
- Academic Journal
- Source
- 现代畜牧科技 / Modern Animal Husbandry Science & Technology. (11):86-88
- Subject
冻精 荷斯坦牛 受胎率 产犊率 妊娠天数 Frozen semen Holstein cattle conception rate calving rate gestation days - Language
- Chinese
- ISSN
- 2095-9737