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| 引用本文： | 陈晓德,李旭光%↓fortheextremetemperatureamplitudeand%↓forthehumidityamp.[J].西南师范大学学报(自然科学版),1997(4). |
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| 作者姓名： | 陈晓德 李旭光%↓fortheextremetemperatureamplitudeand%↓forthehumidityamp |
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| 作者单位： | 西南师范大学亚热带生物地理研究所 |
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| 摘 要： | 通过５年的群落野外调查，研究分析了重庆缙云山退化生态系统５个不同恢复演替阶段群落小气候演替变化规律．在外部气候条件一致情况下，群落演替是群落内发光强度、气温、极温、湿度变化的主导因素；群落小气候明显表现群落演替进程的外部光强条件是：发光强度≥２１６６００ｌｘ，气温＜１０℃或＞２０℃，大气相对湿度≤７３２５％；小气候指标均值在演替轴上的单向相对变化速率Ｖ及其均值Ｖ能有效地指示群落气候恢复速度；系统Ｖ值：光衰减率９５３％↑，气温５２４％↓（对外界升温时刻），极温振幅２５２％↓，湿度振幅１８３％↑；小气候指标对群落恢复演替的敏感性：极温振幅＞湿度振幅＞光衰减率＞气温．
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| 关 键 词： | 退化生态系 小气候 缙云山／重庆 |
Effects of Ca 2 on some physiological charactristics of rice seedling under chilling stress |
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| Liang Ying\ \ Wang Sangen.Effects of Ca 2 on some physiological charactristics of rice seedling under chilling stress[J].Journal of Southwest China Normal University(Natural Science),1997(4). |
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| Authors: | Liang Ying\ \ Wang Sangen |
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| Abstract: | In cold temperature condition,if the solution was short of Ca 2 ,the rice seedling growth would be inhibited.when Ca 2 was added in the solution,the activities of SOD and CAT would be enhanced and the MDA accumulated would be decreased.In the same time,a higher chlorphyll content,photosynthetic rate,rooting ability,protein content,proline content and a lower soluble sugar were observed.The results indicated that Ca 2 would increase rice seedling chilling resistance. |
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| Keywords: | calcium rice seedling chilling resistance physiologic characteristic |
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