| 氮肥对不同退化程度草场羊草光合速率的影响 |
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| 引用本文： | 王明铭,鲍雅静,李政海,杨绍欢,焦静平,郭燕宇.氮肥对不同退化程度草场羊草光合速率的影响[J].安徽农业科学,2012,40(28):13818-13820. |
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| 作者姓名： | 王明铭 鲍雅静 李政海 杨绍欢 焦静平 郭燕宇 |
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| 作者单位： | 大连民族学院环境与资源学院,辽宁大连,116600;大连民族学院环境与资源学院,辽宁大连,116600;大连民族学院环境与资源学院,辽宁大连,116600;大连民族学院环境与资源学院,辽宁大连,116600;大连民族学院环境与资源学院,辽宁大连,116600;大连民族学院环境与资源学院,辽宁大连,116600 |
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| 基金项目： | 国家自然科学基金(30771528,30970494);国家环保公益性行业科研专项(201109025-03B);中央高校基本科研业务费专项资金资助(DC110105,DC120101142) |
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| 摘 要： | 目的]研究氮肥对不同退化程度草场羊草光合速率的影响。方法]以内蒙古白音锡勒牧场羊草为研究对象,通过对草地进行不同的氮肥处理(0、30、50、80 g/m2),分析在不同氮肥梯度下羊草光合速率所受的影响,以及氮肥对不同退化程度草场的影响。结果]随氮肥梯度的增加,羊草光合速率随之增加;不同退化程度的草原群落中,羊草种群光合速率对氮肥的响应程度不同,退化严重的草场中羊草种群对氮肥的响应程度较好。结论]氮肥对于退化严重的草场恢复可起到较好的促进作用。
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| 关 键 词： | 羊草 氮肥 光合速率 |
Effect of Nitrogen Fertilizer on Photosynthetic Rate of Leymus chinensis in Grassland of Different Degrading Degrees |
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| Institution: | WANG Ming-ming et al(College of Environment & Resource Sciences,Dalian Nationalities University,Dalian,Liaoning 116600) |
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| Abstract: | Objective] This study aimed to investigate the effect of nitrogen fertilizer on photosynthetic rate of Leymus chinensis in the grasslands of different degrading degrees.Method] With the L.chinensis in Inner Mongolia Baiyinxile Range as the research object,different rations of nitrogen fertilizer were applied to the grassland(0,30,50,80 g/m2).The effect of different gradients of nitrogen fertilizer on photosynthetic rate of Leymus chinensis,and the effect on grasslands of different degrading degrees were analyzed.Result] The photosynthetic rate of L.chinensis increased with the increase of nitrogen gradients;in the grassland communities with different degrading degrees,the responses of the photosynthetic rate of L.chinensis to nitrogen fertilizer were different,and the response in the grassland with severe degradation was the best.Conclusion] Nitrogen fertilizer played an important role in enhancing the restoration degree of grassland. |
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| Keywords: | Leymus chinensis Nitrogen fertilizer Photosynthetic rate |
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