叶面喷施硼酸对苹果果实硼和钙含量的影响

 以‘富士’苹果为试材，通过幼果期、果实膨大期和果实成熟期叶面喷施硼酸，研究硼对果实硼和钙含量的影响。结果表明：从叶面喷硼对果实吸收硼的短期效果来看，果实发育的不同时期叶面喷施硼酸均促进果实对硼、钙的吸收，并且处理的效果顺序是：幼果期>果实膨大期>果实成熟期；在果实采收时硼含量为：果实膨大期>果实成熟期>幼果期。不同时期叶面喷施硼酸均提高了果肉细胞中水溶态硼、半束缚态硼和束缚态硼的绝对含量，从3种形态硼所占的比例来看，随着果实不断发育，水溶态硼和半束缚态硼比例升高，而束缚态硼比例下降。     

西方商业银行市场营销

西方商业银行在市场营销方面具有丰富的经验。系统介绍了西方商业银行营销的基本内容和现代特征,以求对我国商业银行的健康发展提供一些值得借鉴的经验。     

Proteinase, lipase and amylase activities in the small intestine of pigs suffering from colienterotoxaemia.

The activities of proteinases, lipases, amylases and the activities of proteinase inhibitors, as well as the numbers of Escherichia coli in the contents from the small intestine were examined for pigs suffering from colienterotoxaemia and for healthy pigs. Enzyme activities were determined using an agar diffusion test.Compared with healthy animals the activities of proteinases and amylases in diseased animals were reduced while lipases showed increased activity. In pathologically changed contents showing large numbers of E. coli, proteinases could not be demonstrated; however, proteinase inhibitors were found in these contents. In healthy animals, proteinase inhibitors were not demonstrated in ingesta-con-taining contents.In diseased animals, E. coli were found in large numbers in all parts of the small intestine. In healthy animals, E. coli was demonstrated especially in the posterior part of the small intestine and regularly in small numbers.The possible influence of digestive enzymes, especially proteinases and their inhibitors, on enterotoxins from E. coli is discussed.     

Estimation of protein contents in winter wheat grain using satellite remote sensing

(Jpn. J. Soil Sci.Plant Nutr., 77, 317–320, 2006)     

缺磷胁迫对长豇豆幼苗脱落酸含量的影响

研究耐缺磷程度不同的长豇豆品种在缺磷胁迫下脱落酸(ABA)含量的变化。结果表明缺磷胁迫下长豇豆幼苗根系ABA含量都增高,缺磷前期下降后升至1个高峰后再降低,高峰出现的迟早与品种耐缺磷性有密切关系,不耐缺磷的二芦白比耐缺磷的芦花白出现早,平均升幅香港青二芦白芦花白。缺磷胁迫下长豇豆幼苗老茎叶和最嫩完全展开叶ABA含量升高,平均升幅香港青二芦白芦花白,但缺磷后期ABA含量二芦白香港青芦花白;缺磷胁迫下幼苗嫩茎叶ABA含量各品种都升高,升幅芦花白二芦白香港青。缺磷胁迫下长豇豆幼苗茎叶ABA含量的增加可能促进磷和水分的运输、减轻膜质过氧化,是对缺磷胁迫的适应机制之一。     

防灾生态学简论

为落实科学发展观,实现可持续发展的需要,在分析人类生态学难以发展的经验与教训的基础上,提出并定义了防灾生态学,定义了有关的概念,阐明了设立防灾生态学的目的、意义、研究内容和学科性质。认为该学科在初创时期至少应包括3个方面的内容:一是理论研究;二是监测、评价、预报研究;三是自然灾害的生态学防治途径和技术研究。并提出了3个主要研究内容的基本纲要。     

武当山地区盾叶薯蓣薯蓣皂苷元含量及生物特性的相关性研究

通过对武当山地区盾叶薯蓣(Diosorea zingiberenzis C．H．Wright)4个居群29个单株根茎的单株质量、折干率、生长速率、薯蓣皂苷元含量检测，及其各生物学特征的差异的研究，探讨了薯蓣皂苷元含量及其它生物特性的相关性。结果表明：武当山地区野生盾叶薯蓣根茎薯蓣皂苷元含量绝大多数在1．6％以上，含量超过2．0％的单株为79％，含量超过3．0％的单株为31％，最高含量达3．51％；武当山泰山庙盾叶薯蓣居群的根茎平均单株质量、平均生长速率、薯蓣皂苷元平均含量显著高于其它3个居群，折干率显著低于其它居群。盾叶薯蓣根茎的薯蓣皂苷元含量与根茎单株质量呈极显著正相关性，相关系数为0．6078，与根茎折干率呈极显著负相关，相关系数为-0．5989，与根茎生长速率不显示显著的相关性；盾叶薯蓣根茎单株质量和生长速率呈极显著正相关，相关系数为0．7199；武当山泰山庙盾叶薯蓣居群为优良的盾叶薯蓣种质，武当山区适合建立野生盾叶薯蓣的种质保护基地。     

核桃叶片中氮、磷、钾含量及年动态变化规律研究

以早实核桃辽宁1号和晚实核桃礼品1号为例，分别测定早实核桃和晚实核桃叶片中不同生育期N、P、K的含量，结果表明，核桃叶片中N、P、K含量在幼龄叶中最高，整个生育期内核桃叶片中N、P、K含量总体上呈逐渐降低。早实核桃的N、P含量比同期的晚实核桃高，且差异极显著；而K含量无差异。     

Blackening of Diospyros genus xylem in connection with boron content

The amount of boron contained in the xylem of Japanese persimmon (Diospyros kaki Thunb.) and ebony (Diospyros ebenum Koen) was determined by inductively coupled plasma (ICP) emission spectrometry and a modified curcumin–acetic acid method. The boron content was compared between the heartwood and sapwood of ebony as well as between a blackened portion (“kurogaki”) and normal portion of Japanese persimmon. The kurogaki contained a higher level of boron than the normal portion of the same individual, although the boron content varied among individuals. Moreover, the boron content of the heartwood of ebony was much higher than that of the sapwood. These results suggest the participation of boron in the blackening of Japanese persimmon. Because both kurogaki and heartwood of ebony are durable to fungal attack, the blackening of Diospyros genus appears to be related to the formation of defensive substances in which boron seems to take part. The convenient curcumin–acetic acid method is an alternative to the ICP method with comparable accuracy.     

不同硼效率棉花品种果胶与不同形态硼含量的差异

溶液培养条件下研究硼(B)对不同B效率棉花品种水溶性果胶、原果胶及水溶性B、酸溶性B含量的影响.结果表明,供B充足时,B低效棉花品种各部位果胶含量均大于高效品种,不同形态B含量也有同样的规律.缺B时,高效品种各部位果胶含量一般高于低效品种.严重缺B使2个棉花品种不同形态B含量均显著降低,水溶性B变化比酸溶性B更明显,低效品种各部位酸溶性B及上部幼叶水溶性B含量降低幅度均大于高效品种,下部老叶和根中水溶性B降低幅度小于高效品种.缺B还使2个品种上部幼叶与下部老叶水溶性B含量比值增加,高效品种增加幅度大于低效品种,该比值在品种间的差异明显大于水溶性B和酸溶性B含量的差异,可以更好地反映不同品种的B效率.