桑椹红色素稳定性的研究

研究了光和热等物理因素、常用食品添加剂、金属离子、氧化剂及还原剂对桑椹红色素稳定性的影响。结果表明 :pH值对桑椹色素的影响显著 ,在酸性条件下色素稳定 ;长时间高温和光照对色素有明显的破坏作用 ;金属离子Na+ 、Ca2 + 、Cu2 + 、Fe2 + 、Mg2 + 、Zn2 + 和Mn2 + 对桑椹色素色泽有一定的增色效果 ,但Fe3 + 则有明显的不良影响 ;食品中常用的葡萄糖、蔗糖、苯甲酸钠和山梨酸钾对桑椹色素无明显的不良影响 ;VC对桑椹色素有双重作用 ,而H2 O2 和Na2 SO3 对色素有严重的破坏作用。     

养禽(肉鸡)产业"小龙模式"的探讨

任何行业都是由“不成熟“走向“成熟“,如果说未来几年的“公司 自养鸡场或外包鸡场“成为集约化养禽的成熟模式;那么“小龙模式“必将成为社会散养禽的成熟模式,最终成为广大养殖户较为稳定的赚钱方式.……     

我国油料、食油市场形势分析

1我国油料市场供应情况我国是世界油料生产大国之一,主要油料作物包括大豆、油菜籽、花生等。新世纪初,我国3大主要油料产量超过4000万t,2004年达到4647万t,创历史最高水平。2004年以来,由于国     

维生素A和β-胡萝卜素在反刍动物中的应用

文中简要介绍了维生素A和β-胡萝卜素的营养生理功能,重点综述了维生素A和β-胡萝卜素对反刍动物繁殖、免疫和生产性能的影响。     

孔雀组织滴虫病的诊治

2007年9月份,沈阳市郊区某珍禽饲养场30日龄雏孔雀暴发组织滴虫病,该场起初误诊断为球虫病,曾用敌菌净、球威、氯苯胍治疗,但仍不     

Changes in growth performance, digestive enzyme activities and nutrient digestibility of cherry valley ducks in response to aflatoxin B1 levels

The objective of this study was to investigate toxic effects of aflatoxin B1(AFB₁) on growth performance, organs, hepatic enzyme activities, apparent digestibility of nutrients and digestive enzyme activities in ducks. Ninety 1-day-old Cherry Valley commercial ducks were designed to three treatment groups with three replicates of ten birds each. Group I (control) was fed conventional feed free of AFB₁, group II or III was fed the diets containing 20 μg/kg or 40 μg/kg AFB₁-contaminated rice respectively. The feeding trial lasted 6 weeks. The results were that decreased body weight gain and feed intake, increased feed to gain ratio and selected organ weights (liver, kidney and pancreas) were observed in AFB₁-treated groups. The activities of serum alanine aminotransferase (ALT) and aspartate aminotransferase (AST) were significantly increased in AFB₁-contamined groups. The apparent digestibility of crude protein (CP) was significantly lower while activities of digestive enzyme from duodenum contents including protease, chymotrypsin, trypsin and amylase were increased in AFB₁-treated group. These results indicated that AFB₁ of feed could decrease growth performance and apparent digestibility of nutrients, change digestive enzyme activities of duodenum contents in duck.     

Milk utilisation patterns in the low-input production systems in South Africa

Understanding the utilisation patterns of milk assists in designing appropriate dairy development schemes in rural communities. The objective of the study was to determine milk utilisation patterns in different smallholder farming systems in the Eastern Cape Province of South Africa. Data were collected through the administration of recording sheets to 130 randomly selected households in Alice, Fort Beaufort and Queenstown districts. Amounts of milk produced per household ranged from 9 to 21 l per household per day. Milk consumption/household/day was similar among the three districts. Milk consumption in the early lactation doubled the amount consumed in late lactation (P < 0.05). Milk in the communal areas was largely utilised as fresh or sour milk. Fresh milk was mostly used in tea/coffee or to make porridge for children. Sour milk was consumed with thick boiled maize meal. Fort Beaufort (10.2 ± 1.37 l/day) had the highest sour milk sales whilst Queenstown had the highest fresh milk sales (9.7 ± 5.57 l/day). It was concluded that quantities of milk consumed or sold as fresh or sour were generally low and varied across smallholder farming systems.     

省力化养蚕技术及其应用

降低生产成本，降低劳动强度，提高蚕桑生产比较效益，是当前和今后蚕桑生产稳定发展的重要问题，本文概要介绍我省省力养蚕技术的发展过程，提出了省力化养蚕技术规范，应用省力化养蚕技术的五条技术关键和推广措施以及应用效益。     

功能性饲料在动物健康养殖中的应用研究进展

功能性饲料是一种新型的绿色环保饲料,具有维护动物健康、保证畜产品安全和降低养殖污染等特殊功效.文章就近几年来国内外有关功能性饲料开发和应用等方面的研究进行概述,为进一步研究提供理论参考.     

免疫卵黄抗体预防家蚕血液型脓病的探讨

给母鸡注射纯化的家蚕NPV抗原，获得免疫卵黄抗体，测定效价为1：160。用免疫卵黄抗体进行添食试验，结果表明其对家蚕血液型脓病有一定的预防效果，并且对养蚕生产安全无毒。