By popularizing the feed formula of lean-type pigs, the lean meat rate can be increased and the fattening period can be shortened. The lean meat ratio can be increased by about 4% at the time of slaughter. The following is the lean-type pig feed formula for reference. Pre-fattening (weight 25 kg - 35 kg): corn 59%, wheat bran 13%, peanut cake or bean cake 15%, grass powder 5%, fish meal 6%, bone meal 1.5%, salt (fish meal high salt can not add ) 0.5%. Medium-term fattening (weight 35 kg - 60 kg): corn 51.9%, wheat bran 24%, peanut cake or bean cake 15%, grass powder 3%, fish meal 4.3%, bone meal 1.3%, salt 0.5%. The late fattening period (weight 60 kg - 90 kg): corn 65.2%, wheat bran 18%, peanut cake or bean cake 10%, grass powder 3%, domestic fish meal 2%, bone meal 1.3%, salt 0.5%. Piglets (weight 1 kg-10 kg): corn 60%, wheat bran 10.5%, peanut cake or bean cake 15%, fish meal 10%, yeast powder 3%, bone meal 1%, salt 0.5%. For every 100 kg of feed, add 5 grams of copper sulfate and 10 grams of multivitamins. Pregnant sows: 50% corn, 17% wheat bran, 11% peanut cake or bean cake, 14.5% hay powder, 6% domestic fish meal, 1.0% bone meal, 0.5% salt. Daily with some fresh green feed. Sows during lactation: corn 50%, wheat bran 17%, peanut cake or bean cake 11%, hay powder 14.5%, domestic fish meal 6%, bone meal 1%, salt 0.5%. One kilogram of green feed was mixed daily. Breeding pigs: corn 43%, wheat bran 30%, peanut cake or bean cake 8%, hay powder 11%, domestic fish meal 6%, bone meal 1.5%, salt 0.5%. Add 100 grams of multivitamins per ton of feed. Three Layers Of Grit Filter,Three Sand Filter,Iron Centrifugal Mesh Filtering,Agricultural Irrigation Centrifugal Strainer Filter Shandong Yibiyuan Water-saving Equipment Technology Co., Ltd. , https://www.cnybyjs.com