The shortage of green forage during winter and spring can be effectively addressed by using silage as a primary feed for dairy cows. Once properly fermented in the pit for about 45 days, silage becomes a nutritious, soft, and palatable feed with a sweet and sour aroma. When feeding cows with silage, there are three key factors to consider:
First, the quality of the silage must be carefully assessed.
(1) Color: High-quality silage should appear green or yellow-green. If it turns black or brown, it indicates spoilage or mold, and such silage must be discarded before feeding.
(2) Smell: Good silage has a pleasant, sweet-sour odor, sometimes resembling a pear-like scent. A strong sour smell suggests mold, and corrective actions should be taken before feeding.
(3) Texture: Quality silage is soft and moist. If it feels sticky or dry and hard, it may have spoiled and should not be fed to cows without treatment.
Second, the feeding method plays a crucial role in ensuring optimal digestion and health. Silage should be introduced gradually to avoid digestive upset. It is best to mix silage with other roughages like soybean hay, yew grass, or cereal grass. Feeding silage alone can lower the rumen pH, increasing the risk of acidosis. To counter this, adding 3% baking soda to the concentrate can help neutralize acidity, improve digestion, and boost milk production. Mixing silage with hay before feeding helps prevent selective eating. For better results, especially in high-producing cows, a total mixed ration (TMR) that combines silage, hay, and concentrate is recommended.
Third, the amount of silage fed should be adjusted based on the cow’s size and milk yield. Cows weighing around 500 kg and producing 20 kg of milk daily can be fed 20 kg of silage plus 5 kg of hay. For cows weighing 400 kg and producing 15 kg of milk, 15 kg of silage and 5 kg of hay are sufficient. Cows producing less than 15 kg of milk per day may require 15 kg of silage and up to 10 kg of hay. It's important to stop feeding silage 15 days before calving and resume 15 days after. Dry cows should receive about 10 kg of silage daily along with appropriate amounts of hay. Breeding cattle should be given less silage, ideally under 8 kg, while young animals should be fed sparingly or not at all.
Cylindrical Roundness Tester
A measuring instrument for quantitatively evaluating the cylindricity of a cylinder by measuring the actual contour of the cylinder using the precise rotation centerline as the reference standard and the precise linear motion guide rail as the reference standard. It can be used to measure cylindrical shape errors (roundness, cylindricity, straightness, and flatness), position errors (coaxiality and verticality), etc.
The cylindrical Roundness Tester is mainly used to measure the roundness, cylindricity, straightness, concentricity, coaxiality, flatness, parallelism, perpendicularity, surface waviness, discontinuous surface, etc. of various regular and irregular circular workpieces. It can also perform spectrum analysis, wave height analysis, eccentricity, shaft bending analysis, and runout analysis on workpieces.
This device has excellent cost-effectiveness, full measurement capability, and is easy to learn and use.
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