饲喂高水分湿贮玉米对奶牛生产性能及饲养成本的影响

Effects of high-moisture corn on the production performance and feeding cost of dairy cows

高水分湿贮玉米为水分在27%~32%的玉米,经破碎和微生物发酵后的产品,具有成本低、保存时间长等优点。试验通过饲喂高水分玉米,研究其对奶牛生产性能、奶成本的影响。试验牧场2016年与2017年的牛群结构、饲养管理、基础配方均一致,试验选择2016年6~7月份泌乳天数在150~305 d的中低产牛群为对照组,2017年6~7月份同泌乳阶段中低产牛群为试验组。试验组使用2.6 kg高水分玉米等干物质替代原配方的2 kg压片玉米。结果显示,添加高水分玉米对试验组的干物质采食量、单产、全群大罐奶乳成分无显著影响,并且能够显著降低试验组的奶成本约0.12元/kg,能够实现降低饲养成本,提高生产效益的目标。

The high-moisture corn with water in 27% to 32% is high-moisture corn. After being crushed and fermented by microorganisms, this corn has many merits, including long-term preservation and lower feeding costs. The aim of this study was conducted to investigate the effect of milk production pertormance and kilogram milk cost of dairy cows. The herd structure, t〉eding management and basic formula of the experimental farm in 2016 was consistent with those in 2017. The low- and medium-yield cows wilh lactation days of 150-305 days from June to July in 2016 were selected as Ihe control group in the experiment, and the same cows in 2017 were trial group. The dry suhstances, such as 2.6 kg of high-moisture corn, in the trail group, replace the original formula of 2 kg of sliced corn. The results showed that the high-moisture corn had no significant effect on the dry matter intake, yield per unit, and milk composition of the large group of large tanks in the trial group, and it could significantly reduce the cost of kilogram milk in the trail group hy approximately 0.12 yuan/kg, and which could achieve the goal of reducing feeding cost and improving production efficiency.