新课程理念下高校体育教育实习的调查研究

通过文献资料、数理统计、问卷调查等方法,剖析在新课程理念下,高校体育教育实习在学生教学方面存在的不足,提出如何适应中学教学的需要,根据中学体育教学的实际,改革高校体育专业的教学现状,正是这次调查的目的。通过对教学实习调查结果的统计与分析,为高校体育教学的改革提出了依据。     

我国甜菜多倍体品种的RAPD分析

利用RAPD分子标记技术对15个甜菜多倍体品种进行了遗传分析。从以前在甜菜中使用过的14个随机引物中筛选出具有非常明显多态性的引物8个,它们在多倍体品种间共扩增出47条不同位置的带,平均5.9条,特异带32条,特异带比率为68%;两个“双引物”共扩增出10条带,公共带仅1条,多态性频率高达90%。15份材料的遗传相似系数在0.75￣0.99。经聚类分析,可将这些材料分成5个组。RAPD聚类结果基本与血缘、系谱及其在生产实践中的表现相吻合,但也有例外。从分子水平上进一步证明了我国糖甜菜育种中存在的遗传材料基础狭窄的问题。     

Changes in N Composition of Sugar Beet Varieties in Response to Increasing N Supply

The soluble nitrogen (N) components in sugar beet seriously impair sugar recovery. The only N component determined routinely in the sugar factory is amino N (the sum of amino acids in the beet), which is assumed to reflect all the other N components. Amino N is affected by N supply and variety, but only little is known about the other N components such as total soluble N, betaine and nitrate. This study aimed at investigating the effect of N supply on the N composition of sugar beet varieties with special emphasis on N supply by variety interactions. In 2001 and 2002, field trials with four varieties and four N treatments were carried out at six sites in Germany. Storage root yield and the concentrations of sucrose, sodium, amino N, betaine, nitrate and total soluble N in the beet were determined. With increasing N supply, the concentration of amino N increased considerably and that of nitrate slightly, whereas that of betaine remained rather constant. Thus, the N composition of sugar beet changed with increasing N supply and the percentage of amino N of total soluble N increased. Although amino N has the closest correlation with total soluble N, for quality assessment it may overestimate the effect of N supply on other N components. Varieties clearly differed in root yield and quality as well as in all N components. The variety with the lowest amino N had the highest betaine concentration. However, as related to the concentration of total soluble N in the beet, for all varieties amino N as well as betaine showed the same response pattern. This indicates that the N composition of sugar beet is determined by the level of total soluble N, irrespective of variety or N supply. All varieties required the same N supply for obtaining maximum yield or quality. N supply did not affect the ranking of the varieties for all parameters studied, consequently it need not be considered for variety choice.     

绿色优质稻谷栽培技术研究

为生产绿色优质稻谷,从筛选优质高产品种、改用肥料种类和高效低毒农药或生物农药方面进行技术探讨。通过1a的实践表明,在选择优质品种的基础上配备有机肥、生物肥、生物菌肥和生物农药,可生产出绿色优质稻谷。     

不同紫花苜蓿品种在黄土高原丘陵区适应性的研究

通过对不同紫花苜蓿品种的地下生物量、地上生物量、叶片中积累的脯氨酸量的对比研究，运用聚类分析法评估了不同紫花苜蓿品种在黄土高原丘陵区的适应性。结果表明，品种间地下生物量、地上生物量和叶片中积累的脯氨酸量差异较大，Ameristand 201和Algonquin的地上生物量显著大于其它7个品种；Ameristand 201和Sandili的地下生物量显著大于其它7个品种，而Ameistand 201叶片中积累的脯氨酸量在同一时期高于其它8个品种。可以看出以某一性状评价9个品种在黄土高原丘陵区的适应性，会得到不同的结果。因此，运用地下生物量、地上生物量、叶片中积累的脯氨酸量3个指标，对参试9个品种经聚类分析，结果显示Ameristand 201和Sandili较其它7个品种在黄土丘陵区的整体适应性较好，适宜大面积种植和推广。     

甘肃菊科牧草霜霉病调查研究

经调查，甘肃12种菊科牧草上发生霜霉病，由盘霜霉属的7个种、轴霜霉属1个种和首次在甘肃发现的类霜霉属2个种侵梁所致，并发现鉴定盘霜霉新组合种和变种各1个。霜霉病一般在河西地区较陇东、陇南发病严重，有的发病率高速40％以上。     

浅谈学报编辑的创新意识

阐述创新意识的内涵、创新意识的重要性及意义，提出具有创新意识的编辑，必须从学新、查新、更新、创新4个方面努力，才能走创新之路、立创新之业。     

新蚕药添食对防治家蚕病的效果比较

本试验用新药蚕用脓病清，蚕用抗菌素九0一九和常用氯霉素分别给家蚕添食，结果表明，经添食上述药物后，蚕期病死蚕数，死笼率明显低于对照区，虫蛹统一生命率显高于对照区。说明三种蚕药对蚕病的发生均起到较好的防治作用，但以添食氯霉素的效果最好。     

不同树种木材对截头堆砂白蚁初建群体的影响

收集了62种从东南亚进口的不同树种的木材，并作为截头堆砂白蚁Cryptotrmes domestictis（Haviland）的食料，让其原始繁殖蚁自行配对钻人这些木料中取食，建立新群体。观察该种白蚁对不同树种木材的取食状况，了解不同树种木材对该种白蚁初建群体的影响。结果表明，该种白蚁食性广泛，能取食多种在分类上差异很大的木材，除坤甸外，均被其取食。试验用的全部木材对该种白蚁原始繁殖蚁配对没有影响，均有原始繁殖蚁配对钻人洞内。在配对3个月后解剖群体发现，除坤甸、樟木、硬榄仁、柚木、子京、虫眼木、暗罗、硬椴、轻胭脂、胭脂、番龙眼外，其余树种的初建群体，雌雄繁殖蚁存活，子代发育正常。     

水稻新品种金晚3号的选育与推广

本文报道了籼型晚稻新品种金晚3号的选育经过、多年多点鉴定的试验结果、生产上试种推广效果、主要性状分析和栽培技术要点。