| 苦草对NH4+的吸收动力学 |
| Ammonia Uptake Kinetics of a Submerged Macrophyte Vallisneria natans |
| 投稿时间：2011-07-28 修订日期：2011-11-10 |
| DOI： |
| 中文关键词:NH4+；苦草；pH 温度；光照；吸收动力学 |
| 英文关键词:NH4+ Vallisneria natans pH temperature illumination uptake kinetics |
| 基金项目:现代农业产业技术体系建设专项资金支助（CARS-46) |
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| 中文摘要: |
| 以苦草为实验材料，研究了3种光照、3种pH 和3种温度条件下苦草对NH4+的吸收动力学以及苦草根叶的吸收差异。结果表明：弱酸性组（pH5.5）最大吸收速率和亲和力显著高于中型组（pH 7.0)和弱碱性组（pH8.5）；亲和力随照度增大而增大，但中等光强组的最大吸收率显著高于其他两组；温度试验中，最大吸收率和亲和力先随着温度的上升而升高，然后随着温度的上升而降低；叶在苦草全株对NH4+的吸收中占主导地位，3种环境因子通过对叶的作用来影响全株对NH4+的吸收效率。 |
| 英文摘要: |
| In order to investigate the effect of light，pH and temperature on ammonia uptake ability of Vallisneria natans，this paper studied the effects of three levels，pH，temperature and light on the ammonia uptake kinetics of nitrogen. In weak acidic ( pH 5.5)，the affinity and maximum ammonia uptake rate of V. natans is much higher than the other two groups(pH 7. 0 and pH 8. 5).In the experiments on light，the affinity increased with increasing illumination，but the maximum ammonia uptake rate is higher only at medium illumination. In the experiments on temperature，the affinity and maximum ammonia uptake rate is increasing with the temperature at first，and then decreased when the temperature is higher. The Leaves had a majority of the NH4+ absorbed by the plant，and so the 3 environmental factors mentioned above exert more influence on leaf other than root on absorption of NH4+.
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| 张松,何绪刚,谢从新,胡 雄,陈 见,黄海平,李 佩.2011.苦草对NH4+的吸收动力学[J].水生态学杂志,32(6):46-51. |
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