共查询到18条相似文献,搜索用时 62 毫秒
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豆粕是饲料工业中常用的一种优质植物蛋白原料,其营养丰富,蛋白质含量高,氨基酸组成比例合理,但是豆粕中存在多种抗营养因子,降低了畜禽对其营养的吸收和利用。用微生物发酵的方式处理豆粕,不仅可以有效去除豆粕中的抗营养因子,还能够将豆粕的蛋白质降解成小肽,更利于消化吸收,同时还能够产生有益的微生物代谢产物,大大提高了豆粕的营养价值。本文从豆粕营养价值、发酵豆粕特点、发酵豆粕的应用等方面进行阐述。 相似文献
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发酵白菜是在一定条件下通过乳酸菌等微生物发酵制成的,其营养价值、口感风味等受到众多消费者喜爱。本文综述了发酵白菜的风味及品质功能的变化,为提升产品风味、品质提供参考。 相似文献
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采用米曲霉发酵豆粕制备大豆肽,以水解度为指标,考察发酵液初始pH、培养基中豆粕质量浓度、发酵培养温度、培养时间对水解度的影响。通过正交试验得出高水解度大豆肽最佳发酵条件为:发酵液初始pH6.6,培养基中豆粕质量浓度2%,发酵培养温度32℃,时间46h,该发酵条件下大豆肽水解度为48.12%。 相似文献
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一种厌氧发酵豆粕.其特征在于厌氧发酵豆粕中热不稳定抗营养因子和热稳定类抗营养因子的存活率小于5%,其制备方法为粉碎过筛、喷洒发酵液、密封发酵,即可直接饲用或烘干封装,并可替代血浆蛋白、鱼粉等动物源性蛋白质饲料原料。可部分替代有机酸,全部或部分替代抗生素,优越性为无需灭菌处理. 相似文献
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受中美贸易摩擦持续升级和猪肉价格暴涨的影响,豆粕期货价格的波动成为了当前社会各界关注的一个热点问题。本文以2018年1月2日至11月30日期间大连商品交易所豆粕期货价格作为研究对象,分析了ARIMA模型对于豆粕期货价格预测的有效性。实证研究的结果显示该模型在短期内对豆粕价格的预测精确度较高,但是随着时间的推移其误差开始增加。同时,通过ARIMA模型所反映出来的豆粕价格相关性的滞后阶数也可发现目前我国的豆粕期货交易存在投机氛围较浓等问题。基于以上分析,最后分别从投资者角度和期货市场发展层面提出了相应的对策建议。 相似文献
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本实验采用凯氏定氮法、直接干燥法、索氏抽提法及近红外分析仪对豆粕的粗蛋白质、水分、脂肪进行分析测定,旨在将传统检测方法与快速测定法进行对比,分析其测定误差,确定最优测定方法。试验结果表明,2种方法的测定结果差异不显著(p>0.05),均可用于豆粕测定;其中近红外分析仪测定可以节省试剂,减少实验经费,能快速、精准的出具数据,适合在一般饲料质量检测中进行推广。 相似文献
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随着国民经济的不断增长,人们的生活水平不断提升,人们越来越关注到自身的饮食营养健康生活。黄豆作为一种豆类产品,被人们称之为“豆中之王”,有着极为丰富的营养价值,是众多营养健康专家所推崇的天然食物之一。干黄豆中所含的优质蛋白质占到了40%左右,而蛋白质作为人体的重要营养物质,是必不可缺的三大营养元素之一。本文将进一步对黄豆的营养价值及其加工价值展开分析与探讨。 相似文献
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Aquaculture growth has led to worries about overfishing and reduction in wild‐caught food fish supply because of increased demand for fish meal. As such, the price ratio between fish meal and soybean meal has received much attention as an indicator of changing market conditions. In recent years, the price ratio between these two commodities has become more volatile. Several authors have suggested that the traditional relationship between fish meal and soybean meal has broken down and that this is evidence of increased demand pressure on fish meal. In this article, we investigate the hypothesis that there are two regimes for the relative price between fish meal and soybean meal. The empirical results support this hypothesis, with the low‐price regime representing the traditional stable relative price. The continued linkages between the fish meal and the soybean meal markets indicate that aquaculture is reducing its dependency on marine proteins in favour of vegetable proteins. 相似文献
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粮食价格及收入变动对国民营养影响分析 总被引:1,自引:0,他引:1
本文以粮食中的热量、蛋白质和脂肪为研究对象,利用差分需求方程,估计营养价格弹性和收入弹性,以考察粮食价格及收入变动对居民营养需求的影响。实证结果表明,收入变动对居民营养需求影响不大,粮食是居民基本营养来源。稻谷和小麦主食类粮食价格变动对居民营养需求具有一定影响,价格变动将使其反向调整对热量、蛋白质和脂肪的需求,玉米和大豆非主食类粮食价格变动则影响较小。 相似文献
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为开发市售羊肚菌资源,探讨其营养价值,以云南和四川市售羊肚菌为材料,利用酸度计和自动氨基酸分析仪对其游离氨基酸和水解氨基酸组分进行检测,为市售羊肚菌的开发提供数据支撑。结果表明,云南源羊肚菌游离氨基酸显著高于四川源羊肚菌;2种市售羊肚菌均含有17种水解氨基酸,7种人体必需氨基酸,氨基酸总量为20.54~22.93 g/100 g,必需氨基酸含量为7.42~8.64 g/100 g,第1限制氨基酸为亮氨酸和异亮氨酸。氨基酸比值系数分为80.67~85.48,必需氨基酸指数均高于FAO/WHO推荐营养模式。从应用价值层次分析,以味觉和功能氨基酸为开发目标,四川源羊肚菌较为适宜;以药用性氨基酸为开发目标,云南源羊肚菌较为适宜。 相似文献
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James Madzimure Michael Chimonyo Kennedy Dzama Stephen T. Garnett Kerstin K. Zander 《Journal of Agricultural Economics》2015,66(3):812-831
Although there is growing demand for animal products in Africa, production is stagnating. Appropriate management of livestock diversity could help reinvigorate production, contribute to food security and improve farmers’ livelihoods, particularly in subsistence‐oriented systems. We assess differences in farmers’ preferences and economic values for pig traits across different production systems and across areas that have been affected and unaffected by classical swine fever (CSF). Not surprisingly, market‐oriented farmers derived higher values from the productive traits such as heavy slaughter weight and large litter size found in exotic pig genotypes. Subsistence‐oriented farmers, particularly in swine fever affected areas, placed high value on tolerance to disease. We found that CSF changed farmers’ preferences for adaptive traits, and less so for productive traits. Therefore, indigenous breeds become more valuable for subsistence farmers and crossbreeds for market‐oriented farmers if CSF is a risk. Our results can have implications for breeding and conservation strategies and for compensation strategies after culling, and will become increasingly relevant if, as predicted, heat waves and disease outbreaks become more frequent in pig production systems in South Africa with climate change. 相似文献