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建立人际资源圈Production_Of_Milk_In_Dairy_Cows
2013-11-13 来源: 类别: 更多范文
Production Of Milk In Dairy Cows
In the experiment testing efficiency of body tissue energy for milk production in lactating dairy cows, researchers studied how food intake affected milk production levels. In this experiment, six Holstein-Friesian dairy cows were chosen and then subjected to a calorimeter, in which two levels of metabolisable energy intake (MEI) were given during a total of nine days. In the first three days, the calorimeter maintained a normal level. For the last six days, the cows were subjected to lower levels of food intake through the calorimeter. The levels were reduced by 70 MJ per day. The explanatory variable is the amount of food intake by the calorimeter, with the two levels of food administered. The response variable is the amount of milk produced.
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