This experiment was conducted to study the effects of different annulus gaps of expander on feed quality of main material, and the effects of different dilatations of main material on the feed pellet processing quality and growth performance of weaned piglets under the same formula. Three different annulus gaps (3.2, 3.8 and 4.5 cm) were used for expand processing, and the diets were produced at low temperature. Seventy-two 32-day-old "Largewhite×Landrance×Duroc" weaned piglets were allocated into three groups with similar body weight [(5.8±0.5) kg ], with 6 replicates per group and 4 pigs per replicate. Piglets in 3 groups were fed these three diets with different dilatations, respectively. The experiment lasted for 28 days. The results showed as follows: with the decrease of the annulus gap, starch gelatinization of main materials was increased after expand processing, and starch gelatinization of 3.2 cm group was significantly higher than that of the other two groups (P<0.05), crude protein in vitro digestibility of 3.2 cm group was significantly higher than that of 4.5 cm group (P<0.05), but not significantly different from 3.8 cm group (P>0.05). After the feed was produced at low temperature granulating, the feed starch gelatinization, particle hardness and particle durability indices of 3.2 cm group were the highest, which were 41.95%, 25.36 N and 96.11%, respectively. When the expander annulus gap was 3.2 cm, the weaned piglets had the best average daily gain and the ratio of feed to gain, which were 0.33 kg and 1.5, respectively. In conclusion, pellet feed quality and the growth performance of weaned piglets is best when the annulus gap is 3.2 cm.
DUAN Haitao, LI Junguo, ZHANG Jian, QIN Yuchang
. Effects of Different Annulus Gaps of Expander on Feed Pellet Quality and Growth Performance of Weaned Piglets[J]. Chinese Journal of Animal Nutrition, 2015
, 27(5)
: 1511
-1518
.
DOI: 10.3969/j.issn.1006-267x.2015.05.022
[1] 侯雁.SPZL338膨胀器的特点及应用[J].粮食与饲料工业,2011(6):1-5.
[2] 余传忠.挤压膨胀器与制粒机相结合的生产工艺[J].饲料工业,2000,21(9):9-10.
[3] 沈卫,周粉富,石贤高.膨胀器在饲料加工过程中的应用[J].中国饲料,1998(15):21-22.
[4] 程美玲,高士争,张曦,等.膨胀加工对饲料营养成分的影响[J].饲料工业,2001,4(4):7-9.
[5] 孙杰.断奶仔猪颗粒料加工工艺比较研究[D].硕士学位论文.北京:中国农业科学院,2014.
[6] PLAVNIK I,SKLAN D.Nutritional effects of expansion and short time extrusion on feeds for broilers[J]. Animal Feed Science and Technology,1995,55(3/4):247-251.
[7] LUNDBLAD K K,ISSA S,HANCOCK J D,et al.Effects of steam conditioning at low and high temperature,expander conditioning and extruder processing prior to pelleting on growth performance and nutrient digestibility in nursery pigs and broiler chickens[J].Animal Feed Science and Technology,2011,169(3/4):208-217.
[8] 宋富平.饲料加工中的膨化和膨胀技术[J].饲料博览,1999(5):20-24.
[9] LUNDBLAD K K,HANCOCK J D,BEHNKE K C,et al.Ileal digestibility of crude protein,amino acids,dry matter and phosphorous in pigs fed diets steam conditioned at low and high temperature,expander conditioned or extruder processed[J].Animal Feed Science and Technology,2012,172(3/4):237-241.
[10] 孙杰,张建,李军国,等.断奶仔猪大宗原料混合料膨胀加工参数试验研究[J].饲料工业,2014,35(9):27-32.
[11] 熊易强.饲料淀粉糊化度(熟化度)的测定[J].饲料工业,2000,21(3):30-31.
[12] 顾君华.饲料检验化验员[M].北京:中国农业出版社,2010:89-90.
[13] 国家技术监督局.GB/T 6432—1994 饲料中粗蛋白测定方法[S].北京:中国标准出版社.
[14] 王卫国,李石强,张磊,等.六种饲料原料粉碎粒度与蛋白质溶解度关系研究[J].饲料工业,2002,23(5):6-8.
[15] 国家技术监督局.GB/T 18246—2000 饲料中氨基酸的测定[S].北京:中国标准出版社.
[16] 李启武.不同加工工段对淀粉糊化度的影响[J].饲料工业,2002,23(1):7-9.
[17] 武磊.玉米淀粉热变性与吸水特性的研究[D].硕士学位论文.北京:中国农业科学院,2010.
[18] 马成林,左春柽,张守勤,等.高压对玉米淀粉糊化度影响的研究[J].农业工程学报,1997,13(1):172-176.
[19] 李宝林,孙华仁.膨胀器在饲料工业中的应用[J].饲料与畜牧,2011(10):26-30.
[20] BOS K J,STROUCKEN W J J,BOOR H.膨胀加工对饲料理化性质和营养价值的影响(续Ⅲ)[J].刘焕龙,译.国外畜牧学:饲料,1998(4):1-4.
[21] 徐学明,谢正军,金征宇.膨胀器与膨胀饲料[J].中国饲料,1999(17):25-27.
[22] GOELEMA J O,VANDERPOEL A F B.膨胀加工对饲料理化性质和营养价值的影响(续Ⅴ)[J].吴习飞,译.国外畜牧学:饲料,1998(6):1-5.
[23] 宋晓旻.膨胀加工方式及其对饲料营养价值的影响[J].饲料工业,2012,32(23):1-5.
[24] AMORNTHEWAPHAT N,ATTAMANGKUNE S.Extrusion and animal performance effects of extruded maize quality on digestibility and growth performance in rats and nursery pigs[J].Animal Feed Science and Technology,2008,144(3/4):292-305.
[25] 金征宇.挤压膨化技术及其在饲料工业中的应用[J].饲料工业,2000,21(6):1-5.
