Departmento de Medicina Animal, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, 91540-000, Brazil.
Departmento de Zootecnia, Faculdade deAgronomia, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, 91540-000, Brazil.
Trop Anim Health Prod. 2021 Apr 15;53(2):261. doi: 10.1007/s11250-021-02720-4.
During the weaning-to-estrus interval (WEI), a high feeding level is usually offered to recover losses due to lactational catabolism. However, several factors can affect the appetite, possibly impairing the efficacy of this strategy. This study aimed to investigate the effect of sow-related factors on average daily feed intake (ADFI) during WEI in 142 primiparous and 458 multiparous sows. After weaning, the sows received 4.3 kg/day of feed and the wastage was recorded. The ADFI after weaning was lower in primiparous than multiparous sows, and on estrous day than in 2 and 3 days preceding estrus (P ≤ 0.05). In primiparous sows, lower ADFI was observed if they had higher backfat thickness at 112 days of gestation (BFT ≥ 11.5 mm) or higher reserves at weaning (BFT ≥ 10.5 mm, caliper units ≥ 12 or ≥ 157 kg; P ≤ 0.05). Higher body reserves at the end of gestation (caliper units ≥ 12, BFT ≥ 11.0 mm, or BCS ≥ 3.0) or weaning (caliper units ≥ 13, BFT ≥ 12.5 mm) negatively affected the ADFI in multiparous sows (P < 0.04). Weaned litter size ≤ 11 piglets (P = 0.06) and shorter lactation length (P< 0.01) decreased the ADFI in primiparous sows. Greater loss in caliper units during lactation tended to reduce ADFI in primiparous and multiparous sows (P ≤ 0.07). Multiparous sows with greater losses in BFT and BCS had lower ADFI (P ≤ 0.03). The ADFI during WEI is reduced when sows are in estrus or if they have greater body reserves.
在断奶发情间隔（WEI）期间，通常会提供较高的喂养水平以弥补哺乳期代谢分解造成的损失。然而，有几个因素会影响母猪的食欲，可能会降低这种策略的效果。本研究旨在调查母猪相关因素对 142 头初产母猪和 458 头经产母猪 WEI 期间平均日采食量（ADFI）的影响。断奶后，母猪每天喂食 4.3 公斤，记录浪费量。初产母猪的断奶后 ADFI 低于经产母猪，发情当天低于发情前 2 天和 3 天（P ≤ 0.05）。在初产母猪中，如果在 112 天妊娠期背膘厚较高（BFT≥11.5 毫米）或断奶时储备较高（BFT≥10.5 毫米，卡尺单位≥12 或≥157 千克；P ≤ 0.05），则 ADFI 较低。妊娠期结束时（卡尺单位≥12，BFT≥11.0 毫米，或 BCS≥3.0）或断奶时（卡尺单位≥13，BFT≥12.5 毫米）较高的体储备会对经产母猪的 ADFI 产生负面影响（P<0.04）。断奶仔猪数≤11 头（P=0.06）和较短的哺乳期会降低初产母猪的 ADFI。哺乳期卡尺单位损失较大，初产和经产母猪的 ADFI 有降低趋势（P≤0.07）。BFT 和 BCS 损失较大的经产母猪 ADFI 较低（P≤0.03）。母猪发情或体储备较高时，WEI 期间的 ADFI 会降低。
