Effect Of Nutrition Level During Gestation On The Reproductive Performance Of Multiparous Sows During Lactation

This research was conducted to investigate the effects of gestation nutrition on the reproduction performance of multiparous sows in subsequent 3 parities . Based on regression analysis of sow feed intake and lactation body weight loss and reproduction performance , the results show that gestation feed intake and lactation feed intake have different effects on piglets performance and sow reproductive performance . explored the nutrition ratio of gestation and lactation .which can better direct how to feed multiparous sows.A one-factor experiment was designed to investigate the effect of lactation feed intake on the reproductive performance of multiparous sows . Using 21 (Landrance x Meishan ) crossbred primiparous sows were allotted randomly to 4 treatments (high, NRC, middle, low Plane of nutrition ) , which were litiermate or semi-littermate with similar body weight at similar age. Sows were naturally inseminated by same healthy , strong Landrance boar . Each treatment consisted of 6 gi Its (high Plane of nutrition consisted of 3 gilts). Gestation feed intake was supplied with different nutrition levels . Experiment sows were offered to different diets in 3 different stages .early gestation diet (1-30 days) , mid pregnancy diet (31-85 days) and late pregnancy diet (85-114days). Days of lactation was 28D, voluntary feed intake .The experimental diets were corn-soybean meal diets (diet of gestation containing3.2 Meal DE/kg and 13.5% CP and diet of lactation containing 3.3 Meal DE/kg and 13.5% CP ). This experiment was performed in subsequent 3 parities and data was collected from 2th parity to 4th parity .The results showed:1, Feed intake will be reduced during lactation if improved during gestation on multiparous sows. Feed intake will be decreased 0. 3193kg during lactation if increased 1 kg during gestation.2 The effect of gestation per kg feed intake on body weight of piglets were greater than that of lactation per kg feed intake . So that sows increase lactation feed intake is benefit to improve the piglets daily weight gain and postweaning body weight.3 Landrance x Meishan multiparous sow body weight gains is approximately 51.72kg during gestation or sow gestation weight gains is approximately 34.40kg or during lactation weight loss approximately 12 kg .which was optimal .4 It is proper to feed Landrance x Meishan multiparous sows with middle Plane of nutrition (in gestation of early .middle and later, the sow respectively fed 1.0, 1.2 and 1. 5 fold of energy for maintenance) . Feed of every piglet significantly decreased 2.625kg as increasing each one piglet ( P<0. 01). Feed of every piglet significantly decreased 0.043kg as increasing lkg body weight of piglet ( P<0. 01).