曾祖代(原种)鸡场的产品开发     

瞿炜 《中国家禽》2000,22(9):5-6,10

作为企业，向社会提供适销对路的产品，是曾祖代鸡场永恒的主题。任何鸡的品种只有不断进行选育才不会落后和退化；任何产品都有其生命周期，鸡的品种也是一样。曾祖代鸡场是我国养鸡业的龙头企业，作为种子工程，国家历来十分重视。曾祖代鸡场进行产品开发，具有十分重要的意义，面临WTO的到来具有紧迫性。没有产品开发，鸡场的品种迟早会落后于市场需要。  相似文献   

猪的行为特征探讨与饲养管理的改善   总被引：2，自引：0，他引：2  

屈彦纯  邓昌彦  刘桂兰 《贵州畜牧兽医》2001,25(5):9-10

猪的行为是猪的本质特征的外在表现，在很大程度上影响着养猪工艺的发展和养猪业的效益。本文概括的分析了猪一般的行为特点和在饲养管理过程中的利用与改善措施。并对相关遗传特征进行了探讨。随着人们对猪的行为性状重要性认识的不断深入，猪的行为特征将在科学和生产过程中得到更加广泛的利用。  相似文献   

音乐教育专业舞蹈课教学的特殊性初探     

彭曲 《湖南农机》2006,(7)

高等院校音乐教育专业舞蹈课教学必须重视其特殊性,本文对舞蹈课程教学的特殊性从四个方面进行了分析,一是突出动作示范,二是加强趣味教学,三是注重特色训练,四是体现层次教育。  相似文献   

Serum antibody response and Cryptosporidium parvum oocyst antigens recognized by sera from naturally infected sheep.     

J Quílez  C A Vergara-Castiblanco  M E Ares-Mazás  C Sánchez-Acedo  E del Cacho  F Freire-Santos 《Veterinary parasitology》2002,104(3):187-197

The response of specific serum immunoglobulins (IgG, IgM and IgA) and the major antigens of Cryptosporidium parvum recognized by these isotypes were investigated by using enzyme-linked immunosorbent assay and immunoblot techniques in lambs and ewes naturally infected throughout an outbreak of cryptosporidiosis. Serum samples were collected from 20 lambs the first day they showed diarrhoea (D1), and Days 11 and 22, in addition to single serum samples from 17 of their dams. Serum anti-C. parvum IgG, IgM and/or IgA antibodies were detected in lambs as early as Day 1. Levels of IgM antibodies remained steady from D1 to D11 and increased at D22, whereas the IgG response decreased from D1 to D11 and subsequently increased. In contrast, IgA antibodies rapidly fell from D1 and all lambs were seronegative at D11 and D22. The highest levels of specific antibodies were detected in sera from ewes. In fact, all ewes were seropositives for IgM and IgA isotypes and most (16/17) showed positive levels of IgG. Four protein fractions (37-39, 42-48, 51-57 and 60-69 kDa) were the most frequently recognized by IgG and IgM from lamb sera. A low molecular weight fraction (12-14 kDa) reacting with IgG and IgA in most lamb sera was scarcely recognized by IgM and three broad bands were frequently recognized by IgA antibodies (23-25, 51-57 and 90-95 kDa). The recognition pattern of 23-25 kDa peptides by IgA from lamb sera clearly increased with the age. Peptides of 42-48, 51-57, 60-69 and 71-78 kDa were most frequently recognized by IgG and IgM from ewe sera. In relation to IgA antibodies from ewe sera, a frequent immunoreactivity was found with proteins in the intervals between 12 and 22 kDa as well as between 32 and 34 kDa and practically all sera reacted with fractions from 42 to 95 kDa.  相似文献   

多胺交联纤维素树脂的合成及吸附性能(Ⅺ)——天然高分子吸附剂研究     

曲荣君  王春华  阮文举  鞠录国 《林产化学与工业》1997,(3)

报道了多乙烯多胺交联的纤维素树脂的合成及其对若干重金属离子的静态吸附性能和吸附机理。研究结果表明，该树脂能有效地吸附Ｃｕ２＋、Ｎｉ２＋、Ｃｏ２＋、Ｚｎ２＋、Ｐｂ２＋，其吸附量可分别达１．２８，１．２４，０．５８，０．６６和０．９９ｍｍｏｌ／ｇ。在ＨＯＡｃ－ＮａＯＡｃ缓冲溶液中可选择吸附Ｃｕ２＋、Ｎｉ２＋等离子而不吸附Ｐｂ２＋。  相似文献   

不同浓度肥料配施对一品红生长发育的影响     

张黎  李勇  屈凤兰  张咏静 《农业科学研究》2005,26(2):90-92

试验以4种不同浓度肥料进行一品红栽培对比试验，调查其株高、茎粗、分枝数、叶片数、红叶片数等生长指标．结果表明：不同浓度肥料配以不同的施肥方法，对一品红生长发育的影响有明显差异．以NP—K(mg／L)=260：80：200浓度的肥料配比栽培效果最好．  相似文献   

优质早籼不育系早红突A的选育   总被引：5，自引：1，他引：4  

潘晓飚  陈玉虎 《杂交水稻》1996,(3):5-6

早红突Ａ是浙江省台州市农科所新育成的一个优质早籼不育系，具有熟期早、配合力好、米质优、异文结实率高等特点，在高产、优质杂文早稻的选育中具有较好的应用前景。  相似文献   

我国的胶合板工业如何应对WTO     

曲禄信  韩建涛 《林业科技情报》2002,34(4):1-2

本文从我国加入WTO入手,集中分析了我国胶合板工业的关税、进出口总量、国内市场对胶合板的消费需求,以及加入WTO以后的机遇与挑战。探讨了应对措施,初步阐述了我国胶合板工业的今后发展趋势。  相似文献   

红星苹果果实的矿质元素含量与品质关系   总被引：34，自引：2，他引：32  

顾曼如  束怀瑞 《园艺学报》1992,19(4):301-306

  相似文献   

Molecular and genetic analyses of S RNase allele in Japanese pear 'Osa-Nijisseiki' (Pyrus pyrifolia Nakai)     

H.-Q. Wu    S.-L. Zhang    H.-Y. Qu 《Plant Breeding》2007,126(1):77-82

  相似文献