CN101103776B - 一种半湿性乳猪饲料的生产方法 - Google Patents
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Abstract
一种半湿性乳猪饲料的生产方法，属于猪饲料加工技术领域。本发明以通常的断奶仔猪料：干性粉状饲料或固体颗粒饲料为原料，经粉碎，过筛，称量加防霉剂，加定量水混匀至含水量为25％-55％，挤压制粒，冷却，包装得成品半湿性乳猪饲料，挤压方法生产时采用挤压机捏合区机筒温度80-150℃，挤压机蒸煮区机筒温度50-100℃和螺杆转速200-1000r/min的挤压条件能够生产得到淀粉糊化度达75％-90％的半湿性乳猪饲料。饲料配方中加入一定浓度的防腐剂，可使半湿性乳猪饲料在六个月内不霉变。
Description
技术领域
一种半湿性乳猪饲料的生产方法，属于农业中猪饲料加工技术领域。
背景技术
早期断奶可以缩短母猪的哺乳时间从而提高母猪的繁殖力和年产仔数，提高分娩利用率，降低仔猪的生产成本，并能阻断某些传染病的传播，因而是现代养猪发展的趋势。但是，早期断奶对仔猪的应激相对较大，这些断奶应激包括营养应激，环境应激，争斗应激等。
为了消除或减轻这种断奶应激，改善仔猪健康状况，提高生产性能，长期以来人们在饲料营养、饲喂方法、饲喂次数及调味剂等方面就仔猪开食料品质提高作了大量研究，但就饲料形态对这种应激影响的研究相对较少。目前采用的断奶仔猪料通常为干性粉状饲料或固体颗粒饲料，事实上，这种由液态的母乳向固态饲料突变的采食方式对仔猪的影响十分巨大，这种应激会导致仔猪采食量和消化率下降、肠道结构改变、生长发育受阻，甚至死亡率提高。因此，如何采用适当形态的饲料或适当的饲喂方式来克服上述这种采食方式突变的缺点，对减少断奶仔猪的应激也十分重要。
为了克服上述对仔猪直接饲喂干性物料的缺陷，目前养殖户通常在饲喂时将干性饲料加水调湿。但此法不仅劳动强度大，操作麻烦，不适合于规模化养殖场，而且由于所加水卫生难保证，有时还会加剧断奶时仔猪的应激，导致仔猪腹泻。因此采用更为有效的饲料形态来克服目前断奶仔猪饲料的缺点对提高养殖效益十分重要。
发明内容
本发明目的是提供一种半湿性乳猪饲料的生产方法，涉及的是利用挤压技术生产含水量高达25％-55％的半湿性乳猪饲料，包括优化其生产工艺条件和相应的防霉技术。
本发明的技术方案：以通常的断奶仔猪料：干性粉状饲料或固体颗粒饲料为原料，经粉碎，过筛，称量加防霉剂，加定量水混匀，挤压制粒，冷却，包装得成品半湿性乳猪饲料，所述各步骤的要求为：
原料粉碎粒度过30-80目，最优为40-60目。
防霉剂选用山梨酸、山梨酸钾、苯甲酸、苯甲酸钠、丙酸钙、脱氢乙酸钠或对羟基苯甲酸酯中的一种或几种复配，用量不超过国标规定的最大允许量添加，不超过饲料干基总量的0.05％。
加定量水：使半湿性乳猪饲料成品的含水量变化范围为质量分数25％-55％，最佳含水量质量分数为30％-40％。
挤压机选用双螺杆挤压机或单螺杆挤压机，挤压机捏合区温度为80-150℃，最佳温度为120℃±5℃。挤压机蒸煮区温度为50-100℃，最佳温度为60℃±5℃。挤压机螺杆转速为200-1000r/min，最佳转速为200-350r/min。挤压机模头模孔为2.0-4.0mm，模板开孔率为25％-50％，最佳模孔为2.5mm，模板开孔率为30％。挤压机可配备调质器，调质器的蒸汽消耗量与前面所述的加水量要协调，使最终饲料含水量在上述的范围之内。
物料经挤压后冷却至比环境温度高3-7℃时称量包装，包装材料选用透气率和透湿率低的材料为佳，如采用乙烯—乙烯醇共聚物(EVOH)、聚酯(PET)或复合包装材料，如PET/PE(聚乙烯)、铝箔/PE等。
本发明的有益效果：挤压是利用高温高压处理物料的加工技术。用这种方法加工饲料均能使蛋白变性、淀粉糊化，能有效杀灭饲料中的微生物，并可使一些抗营养因子失活，因而对提高饲料品质十分有效。结合断奶乳猪的生理与饲养特点，本发明采用挤压技术生产高水分的乳猪开食料。旨在使开食料从营养品质及适口性两个方面都得到提高，从而更适合于乳猪的生长。
具体实施方式
本发明将在以下实施例中进一步阐述，但这并不应成为对发明范围的限制。
实施例1
乳猪料配方(％)：玉米57，大豆粕20，全脂膨化大豆10，乳清粉5，鱼粉4，磷酸氢钙2；，石粉0.7，食盐0.3，脱氢乙酸钠0.03，沸石粉0.97。饲料营养指标为：粗蛋白20％，钙0.9％，有效磷0.5％，赖氨酸1.3％，含硫氨基酸0.8％，消化能3300KC/kg。
以单螺杆挤压机为主要加工设备，将豆粕、鱼粉、玉米等原料分别粉碎过60目筛，按上述配方将粉碎后的原料按配比称量配合后，加水至饲料含水量质量分数达到30％，经挤压机捏合区机筒温度120℃±5℃，挤压机蒸煮区机筒温度在60℃±5℃，螺杆转速300r/min，由模孔为2.5mm，开孔率为30％的模板挤出后的半湿性乳猪饲料糊化度达到83％，颗粒强度达到180-235g。该饲料经PE材料包装成1kg/袋，25℃恒温贮藏六个月未见发霉变质现象。
Claims (2)
1.一种半湿性乳猪饲料的生产方法，其特征是以通常的断奶仔猪料：干性粉状饲料或固体颗粒饲料为原料，经粉碎，过筛，称量加防霉剂，加定量水混匀，挤压制粒，冷却，包装得成品半湿性乳猪饲料，所述各步骤的要求为：
原料粉碎粒度过30-80目；
防霉剂选用山梨酸、山梨酸钾、苯甲酸、苯甲酸钠、丙酸钙、脱氢乙酸钠或对羟基苯甲酸酯中的一种或几种复配，用量不超过饲料干基总量的0.05％；
加定量水：使半湿性乳猪饲料成品的含水量范围为质量分数30％-40％；
挤压机选用双螺杆挤压机，挤压机捏合区温度为80-150℃，挤压机蒸煮区温度为50-100℃，挤压机螺杆转速为200-1000r/min，挤压机模头模孔为2.0-4.0mm，模板开孔率为25％-50％，挤压机配备调质器，调质器的蒸汽消耗量与所述的加水量要协调，使成品饲料含水量在所述的范围之内；
挤压后物料经冷却至比环境温度高3-7℃时称量包装，包装材料选用透气率和透湿率低的材料：采用乙烯-乙烯醇共聚物，聚酯，或复合包装材料：聚酯/聚乙烯，铝箔/聚乙烯。
2.根据权利要求1所述的生产方法，其特征是原料粉碎粒度要求过40-60目，挤压机捏合区温度为120℃±5℃，挤压机蒸煮区温度为60℃±5℃，挤压机螺杆转速为200-350r/min，挤压机模头模孔为2.5mm，模板开孔率为30％。
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| CN101984863B (zh) * | 2010-09-21 | 2012-09-05 | 重庆威士化工有限公司 | 一种饲料防霉剂 |
| CN103082091B (zh) * | 2013-01-15 | 2015-05-13 | 广州格雷特生物科技有限公司 | 一种畜禽专用营养强化液及其制备方法 |
| CN103519019A (zh) * | 2013-10-17 | 2014-01-22 | 丹阳市正大油脂有限公司 | 一种乳猪饲料的生产工艺 |
| CN107801848A (zh) * | 2017-11-11 | 2018-03-16 | 陈培党 | 一种黑山羊速长饲料的生产技术 |
| CN110050886A (zh) * | 2019-05-15 | 2019-07-26 | 北京波尔莱特饲料有限公司 | 一种保质期长的干湿混合全价饲料及其制备方法 |
| CN110050884A (zh) * | 2019-05-15 | 2019-07-26 | 北京波尔莱特饲料有限公司 | 一种保质期长的干湿混合浓缩饲料及其制备方法 |
| CN110583890A (zh) * | 2019-10-29 | 2019-12-20 | 广州唯思顿生物技术有限公司 | 一种无抗生素的半湿乳猪饲料 |
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