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高中体育生的课余训练对策探微
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作者 余朝丹 《体育风尚》 2020年第6期53-53,共1页
高中体育生在任何的高校中都算是非常特殊的群体,在进行高强度的体育训练的时候还要兼顾文化课的学习,他们每天付出的努力都对其他的学生起到了激励作用。然而体育训练并不是那么容易的事情,除了每天的必修功课之外,在课余时间还要时刻... 高中体育生在任何的高校中都算是非常特殊的群体,在进行高强度的体育训练的时候还要兼顾文化课的学习,他们每天付出的努力都对其他的学生起到了激励作用。然而体育训练并不是那么容易的事情,除了每天的必修功课之外,在课余时间还要时刻保持身体状态,有很多的体育生都对课余训练的方法和方向都很迷糊,所以为了帮助他们制定科学有效的课余训练计划,本文以高中体育生的课余训练为主题,帮助他们探索出制定课余训练计划的具体对策. 展开更多
关键词 高中体育生 课余训练 体能增长
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Impact of Stocking Density on the Polyculture of C/arias gariepinus and Oreochromis niloticus
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作者 Olele Nkeonyeasua Florence Tighiri Onome Harrison 《Journal of Agricultural Science and Technology(A)》 2012年第8期1018-1023,共6页
Knowledge on stocking density enables the farmer decide on the density limits that will enhance fish yield when intuition and experience are used as guide. Twelve weeks experiment conducted in concrete tanks assessed ... Knowledge on stocking density enables the farmer decide on the density limits that will enhance fish yield when intuition and experience are used as guide. Twelve weeks experiment conducted in concrete tanks assessed the growth performance and survival rate at different stocking densities of test specimens. Data analysis revealed that the highest stocking density produced the highest (157.85 ±36.54a) mean weight gain for C. gariepinus. Mean weight gain for O. niloticus in the same tank as just mentioned, took the reverse order. Specific growth data recorded for C. gariepinus revealed an intermediate value at the highest (4.25 ±1.3ab) and lowest (4.23 ±1.2ab) stocking densities, while the highest value was recorded at the intermediate stocking density (4.41 ± 1.34a). Data on performance index revealed significant differences between the lowest (339.24 ± 86.95b) and intermediate (397.07±103.81a) and also between the lowest (339.24 ± 86.95b) and the highest (397.81±113.14a) stocking densities. The lowest stocking density recorded the highest food conversion efficiency, while the least was recorded at the highest stocking density. Clarias gariepinus recorded 98.3% survival at the highest stocking density, whereas O. niloticus in the same tank recorded 70.83%. The authors therefore conclude that since the highest stocking density gave the best yield in most of the output parameters, it should be recommended to farmers. 展开更多
关键词 Clarias gariepinus Oreochromis niloticus POLYCULTURE stocking ratio.
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