辣椒夏季品比试验报告

为了考察我公司新推广品种及新配组合在高温伏旱状况下的适应性，我们于2003年5月7日在公司试验基地进行了品种对比试验。结果表明新推广品种中有九个品种或组合为极耐热或耐热，一个品种耐热性稍差。新配组合中部分表现优良，有推广前景。     

Narbon Vetch (Vicia narbonensis L.): A Potential Feed Legume Crop for Dry Areas in West Asia

Provision of feed supplies for the rapidly growing livestock population is essential in West Asia. Shortages can be alleviated by growing forage crops in the existing fallow lands.
Narbon vetch (Vicia narbonensis L.) is a leguminous species with high yield potential, drought tolerance and cold resistance. It could be used for grain and straw production as source for animal feed in dry areas. It is good source of protein with seeds contain 28 % protein yielding 364 kg per hectare protein, whilst straw contains 9 % protein and yields a similar amounts of digestible protein per hectare.
Nine promising lines of Narbon vetch developed at ICARDA were tested at two sites over four years under rainfed conditions. Since climatic conditions were considered to be of considerable importance, each site in each year was treated as a separate environment to give eight environments with annual rainfall varied from 195 to 504 mm.
Narbon vetch possessed high seedling vigour with rapid winter growth and negligible cold damage. Grain yield varied form 0.47 to 1.90 t/ha, with a harvest index varying from 30 to 40 %. The data indicated that below 300 mm rainfall the grain yield varied from 0.47 t/ha when rain fall was 195 mm to 1.4 t/ha when rainfall was 245 mm. Most of the lines had wide adaptation to dry areas in terms of both grain yield and stability. Climate, except early spring rains had little effect on biological and grain yields.     

朝阳东大桥承台砼施工技术

叙述了朝阳东大桥主桥两个承台大体积砼的施工经过。总结了施工方案优选过程和大体积低水化热砼的配合比试验情况,并在实际施工中,证明,该技术措施可行,方案经济合理,取得了比较成功的经验。     

The Effect of Lead and Zinc on Plant Growth and Chlorophyll Content of Holcus lanatus L.

Root length of Holcus lanatus L. declined rapidly with increasing lead and zinc concentrations in nutrient solution. In all used Pb and Zn concentrations root growth of genotypes coming from a Pb-Zn mine area, was greater than that of the control, suggesting that these genotypes evolved tolerance to Pb and Zn.
Negative correlation was also observed between chlorophyll content and increased heavy metal concentrations. The greater chlorophyll content found in tolerant genotypes, in different Pb and Zn concentrations, in comparison with the control, could be served to distinguish tolerant and non-tolerant genotypes.     

水稻耐盐机理的研究Ⅲ.不同基因型对NaCl吸收和运转的动力学比较

本文应用动力学研究方法比较了具有不同耐盐性的3组共6个水稻基因型对NaCl吸收和运转的差异,结果表明,在外部低NaCl浓度(0.1mmolL~(-1)时,水稻对Na~+的吸收为被动吸收,耐盐基因型对Na~+的吸收速率显著低于盐敏感基因型;对Cl~-的吸收为主动吸收,不同耐盐性基因型吸收Cl~-的动力学参数(V_(?)、K_(?))差异不显著,在外部高NaCl浓度(50mmolL~(-1))时,耐盐基因型对Na~+和cl~-的吸收速率均低于对应的盐敏感基因型。耐盐基因型水稻的Na~+、cl-从根部向地上部的运转率低于对应的盐敏感基因型,这种差异在高盐浓度时更为明显。表明了耐盐基因型水稻地上部对NaCl的排斥作用是吸收控制和运转控制共同作用的结果,使地上部Na~+、Cl-含量相对降低而显出较高的耐盐性。     

SS-1型声速实验仪的研制

本文阐述了SS—1型声速实验仪的原理、结构和测量方法。波动学和分子物理学是物理学中的重要组成部分,"声速的测量"和"Y值的测量"两个实验有助于学生对波动相位的空间分布、谐振动的合成、李萨育图、能量按自由度均分原     

奶牛中草药抗热应激添加剂剂量的对比试验

40头荷斯坦泌乳牛随机分成4组,采用单因子试验设计,分别饲喂由基础日粮与不同剂量的中草药添加剂(每头·日0g为A组即对照组、25g为B组、75g为C组、125g为D组)组成的日粮。结果表明:干物质摄入量C、D组分别比对照组多摄入1.6kg、1.6kg。校正体重和乳脂的产乳量,C组、D组分别较对照组提高46.3%(P<0.01)和34.4%(P<0.01),且C组、D组乳脂率较对照组分别提高8.8%(P<0.05)、20%(P<0.05)。C组、D组红细胞数较对照组分别提高35.8%(P<0.01)、33.9%(P<0.01),而呼吸率则分别降低43.3次/分、47.2次/分、肛温分别降低1.2℃、1.1℃。对照组中暑死亡两头,其余组没有死亡。经济效益,C组、D组分别比对照组提高83.7%.、51.2%。     

肉仔鸡生长过程中行为与产热的变化

研究肉仔鸡成长过程中行为变化对产热量的影响 ,将 2日龄肉仔鸡 36只分为自由摄食、 50 %摄食和绝食 3组进行观测。立位行为集中在明期 ,特别是摄食 30min前后 ,暗期几乎没有出现立体行为。 2日龄时 ,每天约有 70 0min是立位的 ,其后 ,随着日龄的增加而减少。在自由采食区 ,公雏比母雏摄食时间长。 50 %摄食区较自由采食区的摄食时间少。在绝食区 ,随着日龄的增加 ,公母的立位时间呈现减少倾向。 2 1日龄之前随着日龄的增加其摄食时间也增加 ,其后呈现相反倾向。产热 (HP ,kJ/kg0 75)与摄食时间有相同倾向。在 2 1日龄前公雏的HP比母雏低 ,2 1日龄后母雏比公雏低。 1天中各个区的HP活动规律是摄食后 1h内最高 ,暗期降低 ;限制摄食量后 ,HP降低 ,明期和暗期的HP差也随之减小     

双斑东方鲀三倍体育苗生产性研究

采用温度休克方法诱导双斑东方鲀三倍体,在水温18-20℃条件下,卵受精后5分钟用40℃的水处理双斑东方鲀受精卵10分钟,三倍体诱导率100％,孵化率相对诱导量达25％;育苗采用前期室内工厂化培育与后期土池培育相结合方法,培育出全为三倍体(体长3 cm以上)苗种5．8万尾,对应孵出苗量,成活率为34．6％。     

花椰菜AP2/ERF转录因子家族成员BobERF17响应逆境胁迫的表达及功能研究

AP2/ERF为植物特有的一类转录因子超家族,其中ERF家族成员被证实在植物逆境胁迫响应中发挥重要作用.为研究花椰菜中不同ERF转录因子的功能,本研究对花椰菜ERF家族中的一个成员BobERF17进行了克隆、表达及功能探究.序列分析显示,BobERF17编码区全长576 bp,编码一个由191个氨基酸组成的蛋白.聚类分...