合理调整山西人民食物结构的策略与途径     

程创基  刘克治  聂儒峰  刘喜文 《山西农业大学学报(自然科学版)》1991,(2)

合理调整我国人民的食物结构是提高全民族身体素质,推进社会文明进步,具有深远的战略意义的一项国策。调整国民食物结构是一个科学性,政策性很强,社会涉及面广,地区人群民食习惯差别大的极为复杂的动态系统工程。作者针对山西省情实际,从追朔我国饮食传统,膳食民习,食物资源及演变趋向探求,提出合理调整山西人民食物结构的策略与途径。  相似文献   

Behavioral Nutraceuticals and Diets     

《Veterinary Clinics of North America: Small Animal Practice》2018,48(3):473-495

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Undertaking Nutritional Diagnostic Investigations     

Garrett R. Oetzel 《Veterinary Clinics of North America: Food Animal Practice》2014

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不同季节蛋鸡饲料养分浓度的研究Ⅱ.高温期罗曼蛋鸡日粮的优化研究     

周明  李培英  彭克森  丁昌春 《中国农业气象》1997,(6)

在高温夏季（１９９３年７月１日～９月３０日，合肥地区，开放式鸡舍，舍温２７．９～３８．７℃，平均３２．３℃），用６种不同配方的日粮饲喂处于相同生境的６组２３～３６周龄罗曼蛋鸡。按罗曼公司推荐的饲养标准配制第１组日粮；对第２～６组日粮养分浓度作适当调整。饲养结果表明：各组间罗曼蛋鸡产蛋率、饲料转化率和产蛋饲料成本有显著（Ｐ＜０．０５）或极显著（Ｐ＜０．０１）差异。其中，第５组鸡产蛋率（８３．９３％）和饲料转化率（４３．６４％）均为最高（Ｐ＜０．０１），比第１组鸡产蛋率（７８．９１％）和饲料转化率（４１．２６％）分别提高６．３６％（Ｐ＜０．０５）和５．７７％（Ｐ＜０．０５）；第５组鸡产蛋饲料成本（２．５５元／ｋｇ）比第１组鸡产蛋饲料成本（２．９２元／ｋｇ）降低１４．５１％（Ｐ＜０．０１）。第５组日粮配方（％）为：玉米６１．０、小麦麸３．０、大豆粕１７．０、鱼粉４．０、菜籽饼４．３、蛋氨酸０．１４、赖氨酸０．０５、骨粉０．８、石粉８．５、磷酸氢钙０．８、食盐０．３１、禽用微量元素添加剂０．１２、罗曼多维素０．０１８。  相似文献   

柠檬酸在早期断奶仔猪日粮中的应用     

李骅  王福传 《山西农业科学》1999,27(1):76-78

将４８头早期断奶仔猪分为３组,其中两个试验组分别加入柠檬酸０．７％（１组）和１．０％（２组）,另一组不加为空白对照。３周试验结果表明,日增重１组和２组分别比对照组提高１２．１８％和２．２４％,组间差异不显著（Ｐ＞０．０５）。饲料利用率１组和２组分别比对照组提高５．５６％和１５．６９％。头均全期经济效益１组和２组比对照组提高１２．７７％和６．３２％,１组又比２组提高６．０６％。  相似文献   

褐飞虱种群动态的研究 Ⅰ.温度、食料条件对种群增长的影响   总被引：8，自引：0，他引：8  

陈若篪  綦立正  程遐年  丁宗泽  吴中林 《南京农业大学学报》1986,(3)

褐飞虱未成熟期的发育速率与温度呈逻辑斯蒂曲线关系。除取食秧苗外,在其它生育期稻株上完成一个世代的发育起点温度和有效积温值基本相似,其短翅型世代为10.8℃和434.3日度,长翅型世代为10.7℃和452.4日度。卵的孵化率稳定,受试验温度(17.5—29℃)和水稻生育期影响小,平均孵化率为92％。若虫存活率则明显受温度和食料状况影响。成虫寿命、总产卵量、产卵速率等亦因温度和食料条件的变化而有很大波动。温度在27℃,取食分蘖、拔节期水稻的种群内禀增长能力(r_m)最大。  相似文献   

Diet of the largemouth bass, Micropterus salmoides (Lacepède), in Lake Naivasha, Kenya     

P. A. ALOO  S. DADZIE 《Fisheries Management and Ecology》1995,2(1):43-51

Abstract The major food items of adult largemouth bass, Micropterus salmoides (Lacepède), in Lake Naivasha, Kenya are not markedly different from those in its native range. Although insects and their larvae are major components of the diet for both temperate and equatorial populations of juvenile bass, the equatorial population also eats Procambarus clarkii (Girard), juvenile fish and aquatic weeds. In temperate populations they also eat crustaceans, rotifers and oligochaetes. The frequency of occurrence of the major prey organisms in the stomachs of M. salmoides varies seasonally with population peaks in these organisms. Similar to North American populations, the Naivasha population feeds during the day between dawn and dusk. In contrast to temperate populations, the population of M. salmoides in this equatorial lake feeds throughout the year, with feeding intensity correlated with water temperature.  相似文献   

石斑鱼的营养需求及其饲料的研制   总被引：1，自引：0，他引：1  

艾春香  李少菁  王桂忠  林琼武 《海洋水产研究》2004,25(6):86-92

主要综述了石斑鱼的营养需求及其饲料的研制。主要内容包括：(1)石斑鱼对饲料中蛋白质、脂类、碳水化合物、维生素等的营养需求。(2)石斑鱼饲料的研制概况。(3)针对石斑鱼营养学研究以及目前我国石斑鱼养殖还是以小杂鱼为主,配合饲料使用率很低的现状,对今后开展石斑鱼营养与饲料研究提出了若干建议。  相似文献   

Strategies for increasing the selenium content of wheat   总被引：7，自引：0，他引：7  

Malcolm J. Hawkesford  Fang-Jie Zhao 《Journal of Cereal Science》2007,46(3):282

Selenium (Se) is essential for humans and animals but has no known function in plants. Excess accumulation is toxic to both plants and animals. Dietary intake of Se is low in a large number of people worldwide. This is due to low bioavailability of Se in some soils and consequently low concentrations of Se in plant tissues.Both selenate and selenite are taken up by plants and subsequently translocated around the plant. Selenate, an analogue of sulphate, is transported by the sulphate transporter family. Some plants are able to accumulate high internal concentrations of Se (hyperaccumulators); however, genetic variation in accumulation ability amongst non-accumulators such as cereals, is relatively small.Within plant tissues, Se enters the pathways for sulphate assimilation and metabolism and will replace cysteine and methionine in proteins, often with detrimental effect. Alternatively, Se may be accumulated as methylated derivatives or lost from the plant following volatilisation.Agronomic biofortification of crops with Se-containing fertilisers, which is practised in some countries, provides the best short-term solution for improving Se content of wheat. Longer-term genetic improvement, particularly by targeting substrate discrimination of transporters between selenate and sulphate, for example, may provide a means to enhance uptake and promote accumulation.  相似文献   

Evidence-Based Rabbit Housing and Nutrition     

《Veterinary Clinics of North America: Exotic Animal Practice》2017,20(3):871-884

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