地理研究 ›› 2011, Vol. 30 ›› Issue (11): 2076-2082.doi: 10.11821/yj2011110014

• 环境与生态 • 上一篇    下一篇

闽江河口湿地互花米草钾元素分布、积累与季节动态

章文龙1,2, 曾六福1, 张林海1,2,3,4, 曾从盛1,2,3,4   

  1. 1. 福建师范大学地理科学学院,福州 350007;
    2. 福建师范大学亚热带湿地研究中心,福州 350007;
    3. 湿润亚热带生态地理过程省部共建教育部重点实验室,福州 350007;
    4. 亚热带资源与环境福建省重点实验室,福州 350007
  • 收稿日期:2011-03-13 修回日期:2011-08-05 出版日期:2011-11-20 发布日期:2011-11-20
  • 通讯作者: 曾从盛(1954-),男,研究员,博士生导师,主要从事湿地生物地球化学循环研究。 E-mail:cszeng@fjnu.edu.cn
  • 作者简介:章文龙(1986-),男,福建永春人,研究生,主要从事湿地生态环境研究。 E-mail:zhangwenlong027@163.com
  • 基金资助:

    国家基础科学人才培养基金项目(J0830521);国家自然科学基金项目(31000262)

Distribution, accumulation and seasonal dynamics of kalium of Spartina alterniflora in Minjiang River estuary

ZHANG Wen-long1,2, ZENG Liu-fu1, ZHANG Lin-hai1,2,3,4, ZENG Cong-sheng1,2,3,4   

  1. 1. School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China;
    2. Research Center of Wetlands in Subtropical Region, Fuzhou 350007, China;
    3. Key Laboratory of Humid Subtropical Eco-geographical Process (Fujian Normal University), Ministry of Education, Fuzhou 350007, China;
    4. Fujian Provincial Key Laboratory of Subtropical Resources and Environment, Fuzhou 350007, China
  • Received:2011-03-13 Revised:2011-08-05 Online:2011-11-20 Published:2011-11-20

摘要: 选取闽江河口湿地入侵植物互花米草(Spartina alterniflora)为研究对象,测定其各个构件生物量和钾元素含量季节变化,结果表明:互花米草地上部分各个构件钾元素含量从春季到冬季逐渐减少,除夏季外,其余季节绿茎和绿叶钾元素含量显著高于立枯部分(P<0.05),花仅出现在秋冬季节,且在秋季钾元素含量达到峰值(8.97 ± 0.51 mg·g-1);地下部分不同深度根系钾元素含量全年波动较小,在4.38 ± 0.87 mg·g-1 ~ 7.34 ± 0.56 mg·g-1之间,无明显季节变化规律;不同季节绿茎和绿叶钾元素积累量均显著大于立枯部分(P<0.05),钾元素积累量主要集中在绿茎,其次为绿叶;地下部分,不同季节,钾元素积累量均随着深度的增加而减少,夏季地下总积累量达到全年最低值7.89 ± 2.60 g·m-2;地上和地下部分总的钾元素积累量秋季最高(38.10 ± 3.38 g·m-2),冬季最低(23.77 ± 6.38 g·m-2),全年除冬季外,其余各个季节均无显著性差异(P>0.05);不同构件中生物量与钾元素含量对钾元素的积累量的影响程度不同。

关键词: 互花米草, 钾元素, 季节动态, 闽江河口

Abstract: Taking the invasive Spartina alterniflora in the Minjiang River estuary as test objectives, this paper studied the seasonal dynamics of kalium and biomass in different organs of S. alterniflora. The results showed that, on one hand, the kalium content in different organs of aboveground S. alterniflora was reduced gradually with the growing process in the general changing trend within a growing season. Except in the summer, the kalium content in green part was significantly higher than standing dead of S. alterniflora (P<0.05). The flower had maximum kalium content (8.97 ± 0.51 mg·g-1) in winter and only appeared in autumn and winter. On the other, the kalium content of underground part of different depth roots, with no obvious changes, ranged between 4.38 ± 0.87 mg·g-1 and 7.34 ± 0.56 mg·g-1. In addition, the accumulation of kalium in green part was significantly higher than that of standing dead of S. alterniflora (P<0.05), while the main concentration was in the green stem, followed by green leaf. As for the underground part, the accumulation of kalium reduced with the increment of the depth, and had minimum kalium accumulation (7.89 ± 2.60 g·m-2) in summer. To some extent, the total accumulation of kalium measured tallest in autumn (38.10 ± 3.38 g·m-2), and lowest in winter (23.77 ± 6.38 g·m-2). Except in winter, there are no significant differences (P>0.05) in the other seasons. Biomass and contents of kalium had different influences on kalium accumulation in different organs of S. alterniflora.

Key words: Spartina alterniflora, kalium, seasonal dynamics, Minjiang River estuary