Liermann Wendy, Berk Andreas, Böschen Verena, Dänicke Sven
a Institute of Animal Nutrition, Federal Institute for Animal Health , Friedrich Loeffler Institute , Brunswick , Germany.
b Research Institute of Feed Technology of the International Research Association of Feed Technology e.V ., Brunswick , Germany.
Arch Anim Nutr. 2015;69(6):455-72. doi: 10.1080/1745039X.2015.1087748. Epub 2015 Oct 1.
Effects of grinding and hydro-thermal treatment of feed on growth performance, slaughter traits, nutrient digestibility, stomach content and stomach health were examined by using 96 crossbred fattening pigs. Pigs were fed a grain-soybean meal-based diet processed by various technical treatments. Feeding groups differed in particle size after grinding (finely vs. coarsely ground feed) and hydro-thermal treatment (without hydro-thermal treatment, pelleting, expanding, expanding and pelleting). Fine grinding and hydro-thermal treatment showed significant improvements on the digestibility of crude nutrients and content of metabolisable energy. Hydro-thermal treatment influenced average daily gain (ADG) and average daily feed intake (DFI) significantly. Finely ground pelleted feed without expanding enhanced performances by increasing ADG and decreasing feed-to-gain ratio (FGR) of fattening pigs. Coarsely ground feed without hydro-thermal treatment resulted in the highest ADG and DFI, however also in the highest FGR. Expanded feed decreased DFI and ADG. Slaughter traits were not affected by treatments. Coarsely ground feed without hydro-thermal treatment had protective effects on the health of gastric pars nonglandularis, however, pelleting increased gastric lesions. Hydro-thermal treatment, especially expanding, resulted in clumping of stomach content which possibly induced satiety by slower ingesta passage rate and thus decreased feed intake. Pigs fed pelleted feed showed less pronounced development of clumps in stomach content compared with expanded feed.
通过使用96头杂交育肥猪，研究了饲料的粉碎和湿热处理对生长性能、屠宰性状、养分消化率、胃内容物和胃健康的影响。给猪饲喂经过各种技术处理的谷物-豆粕型日粮。饲喂组在粉碎后的粒度（细磨与粗磨饲料）和湿热处理（无湿热处理、制粒、膨化、膨化和制粒）方面存在差异。细磨和湿热处理显著提高了粗养分的消化率和代谢能含量。湿热处理对平均日增重（ADG）和平均日采食量（DFI）有显著影响。未膨化的细磨制粒饲料通过提高育肥猪的ADG和降低料重比（FGR）提高了生产性能。未经湿热处理的粗磨饲料导致最高的ADG和DFI，但也导致最高的FGR。膨化饲料降低了DFI和ADG。屠宰性状不受处理影响。未经湿热处理的粗磨饲料对胃非腺部的健康有保护作用，然而，制粒增加了胃部病变。湿热处理，尤其是膨化，导致胃内容物结块，这可能通过减缓食糜通过率诱导饱腹感，从而降低采食量。与膨化饲料相比，饲喂制粒饲料的猪胃内容物中的结块发育不太明显。
