Farmers are being urged to plan dry cow rations with care, as investing in the dry period is critical to reaping the benefits in the next lactation.
Bethany May, ruminant nutritionist at Trident Feeds, said: "Post-calving, cows often receive close attention and top quality diets, yet pre-calving, it’s easy to underestimate the influence the ration can have on the proceeding lactation.
"It’s critical that dry cows receive enough quality protein in the diet, when fed with a silage or straw base, to maximise outputs when entering lactation.
“There are two types of protein available to the cow; rumen degradable protein (RDP) and digestible undegraded (DUP) by-pass protein.
"RDP is the protein supply available to the rumen microbes, whereas by-pass protein is protein which isn’t digested in the rumen, and is utilised more efficiently in the intestines.
“During the last few weeks of pregnancy and at calving, the cow’s requirement for protein increases, particularly with growing heifers, and dry matter intake will reduce.
"Consequently, this reduces the amount of protein available to boost colostrum production and udder preparation or growth.
“By supplementing the diet pre-calving with a source of by-pass protein, this repletes body protein reserves, eases the transition from calving to lactation without putting too much reliance on adequate rumen function to provide metabolisable protein.
“It also stimulates intakes in early lactation and improves milk yield. Several trials at UK universities have shown supplemental by-pass protein increased milk protein yield and early lactation dry matter intakes.
“A proven cost-effective source of by-pass protein is Trident’s SoyPass, which is produced using a unique patented process which doubles the amount of by-pass protein in soya bean meal.
“Trials in Mecklenburg, Germany, replaced soya bean meal with SoyPass.
"Cows fed SoyPass during the dry cow period, had an increase in milk yield of 1.4kg per day in the first five months of lactation, so the benefits of the addition of SoyPass were seen through increased milk output.
"Protein plays a vital role in the transition of dry cow to lactation, so inclusion of supplementary by-pass proteins in the diet will ensure there are sufficient levels to meet the cow’s needs at calving ready for early lactation.”
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For more information on Trident Feeds please visit tridentfeeds.co.uk