| 地果的光能利用特性及叶面积指数对土壤营养的响应 |
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| 引用本文： | 王传华,李俊清.地果的光能利用特性及叶面积指数对土壤营养的响应[J].草业科学,2009,26(8):181-186. |
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| 作者姓名： | 王传华 李俊清 |
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| 作者单位： | 1. 三峡大学化学与生命科学学院,湖北,宜昌443002;北京林业大学省部共建森林培育与保护教育部重点实验室,北京,100083
2. 北京林业大学省部共建森林培育与保护教育部重点实验室,北京,100083 |
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| 基金项目： | 国家“十一五”林业科技支撑资助项目(2006BAD03A16) |
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| 摘 要： | 研究了地果Ficus tikoua的光能利用特点和地果叶面积指数对土壤营养的响应。结果表明:1)地果光饱和点为1 124 μmol/(m2·s)，光补偿点接近0，因此地果具有较宽的光强适应范围；2)地果水分利用效率为1.45～15.8，在光合有效辐射达500 μmol/（m2·s）时达到最大；3)地果斑块的叶面积指数处于0.662.67 m2/m2，平均为1.51 m2/m2，与其它园林绿化植物相比较低；4)叶面积指数能对土壤营养中的水分和全N含量变化作出响应，对有机C、有机P、有机K的含量变化不敏感。
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| 关 键 词： | 地果 叶面积指数 光响应曲线 水分利用效率 |
Study on light utilization characteristics and LAI response to soil nutriments of Ficus tikoua |
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| WANG Chuan-hua,LI Jun-qing.Study on light utilization characteristics and LAI response to soil nutriments of Ficus tikoua[J].Pratacultural Science,2009,26(8):181-186. |
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| Authors: | WANG Chuan-hua LI Jun-qing |
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| Institution: | 1.College of Life Science;China Three Gorges University;Yichang 443000;China;2.Key Laboratory for Management and Conservation of Forest of Education Ministry;Beijing Forestry University;Beijing 100083;China |
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| Abstract: | The light utilization characteristics and LAI response to soil nutriments of Ficus tikoua were studied. The results indicated that 1) the light saturation point (LSP) and light compensation point (LCP) were 1 124 and 0 μmol/(m2·s) respectively, which implied that it could grow in a wide light condition; 2) the water use efficiency (WUE) ranged from 1.45 to 15.8 and reached the maximum value while PAR reached 500 μmol/(m2·s), this suggested that it could consume less water in daily management; 3) the mean LAI was 1.507 (ranged from 0.664 5 to 2.671 7), which was lower than that of other ground cover species; 4) LAI was sensitive to soil water and nitrogen content, but not sensitive to soil organic C, P and K. |
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| Keywords: | Ficus tikoua leaf area index (LAI) light response curve water use efficiency (WUE) |
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