Effects of Extruded Bulk Materials with Different Starch Gelatinization Degrees on Processing Quality of Pellet Feed and Growth Performance, Nutrient Apparent Digestibility and Serum Biochemical Indexes of Weaned Piglets

GE Chunyu; YANG Jie; ZHANG Jiaqi; XU Chuanxiang; LI Jun; SHANG Fangfang; QIN Yuchang; LI Junguo

doi:10.3969/j.issn.1006-267x.2022.01.015

2022 , Vol. 34 >Issue 1: 141 - 149

DOI: https://doi.org/10.3969/j.issn.1006-267x.2022.01.015

RESEARCH PAPER

Effects of Extruded Bulk Materials with Different Starch Gelatinization Degrees on Processing Quality of Pellet Feed and Growth Performance, Nutrient Apparent Digestibility and Serum Biochemical Indexes of Weaned Piglets

GE Chunyu ,
YANG Jie ,
ZHANG Jiaqi ,
XU Chuanxiang ,
LI Jun ,
SHANG Fangfang ,
QIN Yuchang ,
LI Junguo

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1. Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China;
2. Institute of Animal Science, Chinese Academy of Agriculture Sciences, Beijing 100193, China;
3. Key Laboratory of Feed Biotechnology, Ministry of Agriculture, Beijing 100081, China

Received date: 2021-06-23

Online published: 2022-01-18

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Abstract

The present study aimed to investigate the effects of extruded bulk materials with different starch gelatinization degrees on processing quality of pellet feed and growth performance, nutrient apparent digestibility and serum biochemical indexes of weaned piglets. Bulk raw materials with different starch gelatinization (92%, 85%, 80% and 73%) were prepared by changing the extrusion process parameters. After mixing with premix and heat-sensitive additives, it was pelleted at low temperatures under the same conditions. Ninety-six 28-day-old weaned piglets with the initial body of 7.56 kg were randomly divided into 4 groups for a 50-day feeding trial. Each group had 6 replicates. The feeding trial was divided into 28 days in the earlier stage and 22 days in the later stage. The experimental results showed as follows:1) with regard to processing quality of pellet feed, the hardness and pellet durability index (PDI) were not significantly different among the 85%, 80%, and 73% starch gelatinization degree groups (P>0.05), but they were significantly decreased in the group with the highest starch gelatinization degree (92%) (P>0.05). 2) With regard to growth performance of weaned piglets, the growth performance of the 73% starch gelatinization degree group was the best, and the worst growth performance was observed in the 92% starch gelatinization degree group. The average daily gain of weaned piglets in the 73% starch gelatinization degree group was higher than that of the 92% starch gelatinization degree group (0.05<P<0.10), and the feed/gain was lower than the 92% and 80% starch gelatinization degree groups (0.05<P<0.10). 3) With regard to nutrient apparent digestibility, the 80% starch gelatinization degree group had the highest nutrient apparent digestibility, followed by the 73% starch gelatinization degree group, and the 92% starch gelatinization degree group had the worst. The apparent digestibility of crude protein and ether extract in the 80% starch gelatinization degree group was significantly higher than that of the other groups (P<0.05). 4) With regard to serum biochemical indexes, there were no significant differences in the contents of total protein (TP), albumin (ALB), globulin (GLB) and urea nitrogen (UN) in serum among groups (P>0.05). Considering the growth performance of weaned piglets and the processing quality and cost of pellet feed, it is recommended that the starch gelatinization degree of the extruded bulk raw materials is 73%, which is the best.

Key words： starch gelatinization degree; pellet feed; processing quality; weaned piglet; growth performance

Cite this article

GE Chunyu , YANG Jie , ZHANG Jiaqi , XU Chuanxiang , LI Jun , SHANG Fangfang , QIN Yuchang , LI Junguo . Effects of Extruded Bulk Materials with Different Starch Gelatinization Degrees on Processing Quality of Pellet Feed and Growth Performance, Nutrient Apparent Digestibility and Serum Biochemical Indexes of Weaned Piglets[J]. Chinese Journal of Animal Nutrition, 2022 , 34(1) : 141 -149 . DOI: 10.3969/j.issn.1006-267x.2022.01.015

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