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gan nan zhou he qu ma chang zuo niu ben pin zhong xuan yu jie guo
Author(s): 
Pages: 81-87
Year: Issue:  Z1
Journal: China Yak

Keyword:  本品种选育河曲马母牛畜群结构生长发育玛曲县体尺选育群极端最高温度哺乳期;
Abstract: <正> 河曲马场地处甘肃省玛曲县境内,黄河第一弯曲部。海拔3300—4000米之间,年平均气温1.15℃,极端最高温度23.6℃,极端最低温发-29.6℃。年降水量582.1毫米,多集中在6—9月。年蒸发量为1438.8毫米。年平均相对湿度为63%。无绝对无霜期,饲料作物不能成熟。年日照平均为
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