Show t EFFICIENT FEEDING AND LIVESTOCK MANAGEMENT Dy By Dr Gustav Professor of Animal University of Wisconsin L Lt ss More For Cows With Witha a short hy hay crop over overmuch overmuch much of the country dairy cow feeding calls for adjustment to toa toa a changed feed supply A guiding principle is that a 4 li 1 v abut 12 percent total crude protein in her complete ration on the same dry matter basis dry air basis as that of the combination combination tion of grain a ani and hay xi s Ie illustration r aap I combination would be any of red 4 hay or brome fa-brome hay fed with oats oata or barley each of the theDr Dr Boh feeds 12 percent having total protein No matter what proportion of the hay and grain is fed the ration would have 12 percent We usually feed a greater variety of feeds using corn silage or cane silage in partial replacement of ha hay and a grain mixture that then would need to be higher in protein to compensate com com- compensate for the lower protein an 10 the silage 23 percent nat nat- natural natural ural basis 70 percent dry basis as compared to hay In other words we want to keep the ration in balance to give us about 12 percent protein Supposing we fed a ration of corn com or a cane silage allege 40 mixed legume grass hay 16 and a agrain agrain grain mixture of 14 pounds then the grain mixture would need to have 16 percent protein to give us an average of 12 per per- percent percent cent protein It is n a balanced ration as to protein and energy Since we may have to get with l h eking ll l a ete tt we could get a similar balanced balance ration by increasing the corn com comor cornor or cans silage to 70 pounds mixed hay 4 pounds and a agrain agrain grain mixture 14 pounds but this grain would then need to have fully 20 percent protein to keep keel the ration in balance or to give us 12 percent protein for the ration as a whole again speaking of it on the dry air or plus hay basis Ordinarily Ordinarily ly it takes 3 pounds of this kind of silage to have the same dry matter as one pound of hay Various other proportions of silage and hay or even no hay hayat hayat at all could be fed But to the extent that we depend on corn com silage or cane silage as the main or only forage the grain mixture would need to be fort forti- fortified fled fied not with I but also with calcium pho and trace minerals with salt obviously necessary no matter what the ration It would also be advisable in addition to let the cattle have free access to a phosphate min min- mineral mineral eral mixture and trace miner miner- mineralized mineralized salt r Is copper at all important in trace mineral salt for poultry It has been shown at the University of Missouri that adding copper to a hens hen's diet that was lowin low In copper im- im improved improved proved both egg production and hatchability of eggs bi |