三江平原小叶樟和毛果苔草中N素营养动态分析

应用生态学报 ›› 2000, Vol. ›› Issue (6): 893-897.

三江平原小叶樟和毛果苔草中N素营养动态分析

孙雪利¹, 刘景双², 褚衍儒³

1. 中国环境科学研究院环境评价中心, 北京100012;
2. 中国科学院长春地理研究所, 长春130021;
3. 山东师范大学人口资源与环境学院, 济南250014

收稿日期:1998-12-11 修回日期:2000-08-22 出版日期:2000-12-25
通讯作者: 孙雪利,男,1972年生,硕士,现主要从事环境生态、环境规划与评价方面的研究,已发表论文数篇.E-mail:sunxl@svrl-pek.unep.netorsumxf-1999@yahoo.com
基金资助:
中国科学院长春地理研究所所长基金资助项目

Nitrogen dynamics in different organs of Calamagrostis angustifolia and Carex lasiocarpa in Sanjiang plain

SUN Xueli¹, LIU Jingshuang², CHU Yanru³

1. Chinese Research Academy of Environmental Sciences, Beijing 100012;
2. Changchun Institute of Geography, Chinese Academy of Sciences, Changchun 130021;
3. Shangdong Normal University, Jinan 250014

Received:1998-12-11 Revised:2000-08-22 Online:2000-12-25

摘要/Abstract

摘要： 讨论了沼泽湿地优势种小叶樟(Calamagrostis angustifolia)和毛果苔草(Carex lasiocarpa)生物量和生长率变化情况,不同生长期各器官中N素含量及储量动态变化,以及植物对N素利用和区域养分限制情况.结果表明,两种植物地上生物量生长符合模式p=γ+αt+βt²,地下生物量符合曲线p=a₀+b₀t;受土壤水分、养分、气温和植物本身特点及其对N素选择吸收作用等多种因素影响,小叶樟、毛果苔草和漂筏苔草3种植物不同器官中‘三氮'含量变化较大,NO₃^--N比NH₄⁺-N含量稳定且NH₄⁺-N/NO₃^--N>1;小叶樟、毛果苔草和漂筏苔草3种沼生植物中N:P<14,表明限制本区植物生长的是N,而不是P,而且6月份限制作用较小,8月份限制作用较大.对土壤中有效态N的含量百分比变化分析得到同样的结论.

Abstract: The dynamics of nitrogen content and storage in different organs of Calamagrostis angustifolia and Carex lasiocarpa which are dominant vegetation in swamp wetland were determined,and the utilization rate of nitrogen and its nutrient limitation in the region were analyzed.The results showed that the aboveground and underground biomass might be described by p=γ+αt+βt² and p=a₀+b₀t,respectively.The content of total N,NH₄⁺-N and NO₃^--N varied widely with different organs because of the effects of soil water,nutrient content, atmospheric temperature,vegetable feature and selective absorption to nitrogen,etc.The content of NO₃^--N in different organs varied less than that of NH₄⁺-N,and NH₄⁺-N/NO₃^--N was <1.The N:P content less than 14 in two vegetations showed that it was N but not P was the limitation nutrient to the growth of vegetation in this region,moreover,the limitation was less in July than in August.This conclusion was also drawn from the analysis of the NH₄⁺-N and NO₃^--N content in soil.

孙雪利, 刘景双, 褚衍儒. 三江平原小叶樟和毛果苔草中N素营养动态分析[J]. 应用生态学报, 2000, (6): 893-897.

SUN Xueli, LIU Jingshuang, CHU Yanru. Nitrogen dynamics in different organs of Calamagrostis angustifolia and Carex lasiocarpa in Sanjiang plain[J]. Chinese Journal of Applied Ecology, 2000, (6): 893-897.