GB/T 14699.1-2005

📋 Scope / 适用范围 ai_extracted

This standard specifies the feeding and nutritional monitoring indicators for Holstein dairy cows during growth and growth stages. This standard is applicable to the monitoring of feeding and nutritional status in dairy cattle farms (areas).

📝 Foreword / 前言 ai_extracted

This standard is drafted in accordance with the rules given in GB/T 1.1—2009. This standard was proposed by Hebei Agricultural University. This standard was drafted by: Hebei Agricultural University. The main drafters of this standard are: Gao Yanxia, Li Jianguo, Cao Yufeng, Li Qiufeng, Feng Zhihua, Zhao Xiaojing, Tong Jun, Zhang Qingru, Jia Rongli, Yu Chunqi. DB13/T 1247—2010

📚 References & Relations / 引用与关联

📖 Terms & Definitions / 术语和定义 ai_extracted

乳尿素氮 Milk urea nitrogen，MUN / 乳尿素氮 Milk urea nitrogen，MUN

牛奶中尿素氮含量。乳尿素氮的含量多少，可反应饲料蛋白和能量利用的情况。

Urea nitrogen content in milk. The level of milk urea nitrogen can reflect the utilization of dietary protein and energy.

日粮阴阳离子差 Dietary cation-anion difference, DCAD / Dietary cation-anion difference, DCAD

单位日粮干物质中主要阳离子的毫摩尔数与主要阴离子毫摩尔之差。

The difference between the millimoles of major cations and the millimoles of major anions per kilogram of dietary dry matter.

奶牛体况评分 Body condition score，BSC / Body condition score (BCS)

奶牛脂肪沉积的状况，俗称膘情，它与奶牛泌乳、繁殖关系密切。

The condition of fat deposition in dairy cows, commonly referred to as body condition, is closely related to their lactation and reproductive performance.

泌乳持续力 Milk persistence / Milk persistence

本次测定产奶量与前次测定产奶量的比值（%），反映个体牛只的产奶持续能力。

The ratio (%) of the current milk yield measurement to the previous milk yield measurement reflects the milk production persistence of individual cattle.

🔗 Related Standards / 同类标准