Study On The Balance Pattern Of Energy And Protein And Calcium And Phosphorus Of Milk Cow In Karst Area Milk Cow Commnuity

In order to increase production levels of milk industry, pile up experience and data. This study are based on investigation breed pattern of karst area, study on the need of energy and protein and calcium and phosphorus of milk cow in distinct milk stage.36 health diary cows (consist three diary phase, early lactation 12 heads, Late lactation 12 heads and dry period 12 heads) were used in this experiment, the cow of every phase ware divided into three groups by milking, birth time, weight and other factors. All cows are feeding on the same diet consist of alfalfa, weeds, rice straw and concentrated feed. Usual provision was used in Group I; 2×2 factors cross-feeding trial was used in Group II and Group III, the amount of energy, protein, calcium and phosphorus was prepared according to China Feeding Standard of one group was 120% percent of that the other group. Feeding experiment has been run two times, every formal experiment period has 15 days, advanced experiment period has 7 days.Through experiment and research, the result showed that:Balance pattern of energy and protein and calcium and phosphorus of milk cow in Karst area milk cow community:â‘ NER(KJ/d) = 1.0866(356 W^0.75×k)+M×(0.4+15×Fat)×3138+ΔW×K₁×3138+r;â‘¡CP(g/d) = 1.5515(4.6W^0.75×k)+(M×MPR/0.6)/(3/4.6)+K2×ΔW/(3/4.6)+r;â‘¢Ca(g/d) =1.6816(6×k×w/100)+M×MCa/(1.28/4.5)+r;â‘£P(g/d) = 1.2987(4.5×k×W/100)+M×MP/0.58+r.