Xiang Hai, Zhao Xueli, Fang Yi, Wang Fei, Liang Rong, Sun Xuezhao, Wang Shuiping, Zhong Rongzhen
Jilin Provincial Key Laboratory of Grassland Farming, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China.
College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing 100049, China.
Animals (Basel). 2020 Sep 16;10(9):1659. doi: 10.3390/ani10091659.
Infections with gastrointestinal nematodes (GIN) adversely affect meat color in lambs. Although white-rot fungi (WRF) pretreatment increases nutritional value and fiber digestion of corn straw for lambs, whether it can improve meat quality of lambs infected with GINs is unknown. The objective of this experiment was to study effects of feeding WRF-pretreated corn straw on the health and meat quality of lambs infected with GINs. Sixteen healthy Ujumqin lambs were orally drenched with 3rd-stage GINs larvae and randomly divided into two dietary treatments of control (CON) and WRF diets for 70 days of feeding. Results showed that feeding WRF-pretreated corn straw decreased * and * values ( < 0.05) and increased * value ( < 0.01) of both longissimus thoracis et lumborum (LTL) and semimembranosus (SM) muscles of lambs infected with GINs. Feeding WRF-pretreatment corn straw decreased fecal egg count ( 0.014) and increased packed cell volume ( 0.013) of lambs from 28 d of feeding and increased plasma iron content ( 0.008) of lambs from 56 d of the feeding. Feeding WRF-pretreatment corn straw decreased myosin heavy-chain (MyHC)-I ( 0.032) and MyHC-IIα ( 0.025) content in LTL muscle and MyHC-I ( 0.022) and MyHC-IIβ ( 0.048) in SM muscle of lambs. In conclusion, although there were no significant changes in the content of most amino acids or increased intensity of better flavor compounds, meat quality and health of lambs infected with GINs was significantly improved by feeding WRF-pretreated corn straw due to increased PCV and meat color and tenderness.
胃肠道线虫（GIN）感染会对羔羊的肉色产生不利影响。虽然白腐真菌（WRF）预处理可提高羔羊对玉米秸秆的营养价值和纤维消化率，但它是否能改善感染GINs的羔羊的肉质尚不清楚。本实验的目的是研究饲喂WRF预处理玉米秸秆对感染GINs的羔羊健康和肉质的影响。16只健康的乌珠穆沁羔羊口服接种第3期GINs幼虫，并随机分为对照（CON）和WRF日粮两种日粮处理，进行70天的饲养。结果表明，饲喂WRF预处理玉米秸秆可降低感染GINs的羔羊胸腰最长肌（LTL）和半膜肌（SM）的和值（<0.05），并提高*值（<0.01）。从饲养第28天起，饲喂WRF预处理玉米秸秆可降低羔羊的粪蛋计数（0.014），提高其红细胞压积（0.013），从饲养第56天起可提高羔羊的血浆铁含量（0.008）。饲喂WRF预处理玉米秸秆可降低羔羊LTL肌中肌球蛋白重链（MyHC）-I（0.032）和MyHC-IIα（0.025）的含量，以及SM肌中MyHC-I（0.022）和MyHC-IIβ（0.048）的含量。总之，虽然大多数氨基酸含量没有显著变化，较好风味化合物的强度也没有增加，但由于红细胞压积、肉色和嫩度的增加，饲喂WRF预处理玉米秸秆可显著改善感染GINs的羔羊的肉质和健康状况。
