Deng Bo, Wu Jie, Liu Xuan, Ma Qian, Tao Xin, Qi Keke, Diao Xinping, Xu Ziwei
Institute of Animal Husbandry and Veterinary Science, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China.
Animal Science and Technology College, Northeast Agricultural University, Harbin 150000, China.
Animals (Basel). 2023 Mar 3;13(5):922. doi: 10.3390/ani13050922.
Preference and performance trials were conducted to investigate the effects of extruded corn with different degrees of gelatinization on the feed preference, growth performance, nutrient digestibility, and fecal microbiota of weaning piglets. In the preference trial, 144 piglets who were 35 days old were weighed and allotted to six treatments with four replications per treatment. Piglets in each treatment group were allowed to choose two of the following four corn-supplemented diets: conventional corn (NC) or extruded corn with low (LEC; 41.82% gelatinization), medium (MEC; 62.60% gelatinization), or high (HEC; 89.93% gelatinization) degrees of gelatinization for 18 days. The results showed that the piglets preferred diets supplemented with a low degree of gelatinization of extruded corn. In the performance trial, 144 piglets who were 35 days old were weighed and allotted into four treatments with six replications per treatment. Piglets in each treatment were fed one of the four diets for 28 days. The results showed that LEC and MEC decreased the feed:gain ratio at 14-28 days and 0-28 days, respectively, and increased the apparent total tract digestibility (ATTD) of crude protein compared with NC. Meanwhile, LEC increased the total protein and globulin content in the plasma on day 14, and MEC increased the ATTD of ether extract (EE) compared with NC. Extruded corn with low and medium degrees of gelatinization increased the abundance of Bacteroidetes at the phylum level and , , , and at the genus level. The results showed that extruded corn can improve feed preference, increase growth performance and nutrient digestibility, and modify gut microbiota, and the ideal degree of gelatinization is approximately 41.82-62.60%.
进行了偏好和性能试验，以研究不同糊化度的挤压玉米对断奶仔猪的饲料偏好、生长性能、养分消化率和粪便微生物群的影响。在偏好试验中，对144头35日龄仔猪称重，并将其分配到6个处理组，每个处理组4个重复。每个处理组的仔猪可以从以下四种玉米补充日粮中选择两种：常规玉米（NC）或糊化度低（LEC；41.82%糊化）、中（MEC；62.60%糊化）或高（HEC；89.93%糊化）的挤压玉米，持续18天。结果表明，仔猪更喜欢补充了低糊化度挤压玉米的日粮。在性能试验中，对144头35日龄仔猪称重，并将其分配到4个处理组，每个处理组6个重复。每个处理组的仔猪喂食四种日粮中的一种，持续28天。结果表明，与NC相比，LEC和MEC分别在14 - 28天和0 - 28天降低了料重比，并提高了粗蛋白的表观全肠道消化率（ATTD）。同时，与NC相比，LEC在第14天增加了血浆中的总蛋白和球蛋白含量，MEC增加了乙醚提取物（EE）的ATTD。低糊化度和中等糊化度的挤压玉米在门水平上增加了拟杆菌门的丰度，在属水平上增加了[此处原文缺失部分属名]。结果表明，挤压玉米可以改善饲料偏好，提高生长性能和养分消化率，并改变肠道微生物群，理想的糊化度约为41.82 - 62.60%。
