自然资源学报 ›› 2011, Vol. 26 ›› Issue (1): 48-57.doi: 10.11849/zrzyxb.2011.01.005

• 资源安全 • 上一篇    下一篇

轮叶马先蒿群落土壤种子库特征研究

柳妍妍1, 胡玉昆1, 王鑫2, 公延明1,3, 李凯辉1   

  1. 1. 中国科学院 新疆生态与地理研究所, 乌鲁木齐 830011;
    2. 中国科学院 新疆分院, 乌鲁木齐 830011;
    3. 中国科学院 研究生院, 北京 100049
  • 收稿日期:2010-05-18 修回日期:2010-08-24 出版日期:2011-01-30 发布日期:2011-01-30
  • 通讯作者: E-mail: huyk@ms.xjb.ac.cn E-mail:huyk@ms.xjb.ac.cn
  • 作者简介:柳研研(1982- ),女,甘肃庄浪人,硕士,主要从事草地/土壤生态学研究。E-mail: liuyan198206@126.com
  • 基金资助:

    973专题"干旱区地下有机碳时空分布"(2009CB825103-1)"。

Studies on Characteristics of Soil Seed Bank of Pedicularis verticilata Community

LIU Yan-yan1, HU Yu-kun1, WANG Xin2, GONG Yan-ming1,3, LI Kai-hui1   

  1. 1. Xinjiang Institute of Ecology and Geography, CAS, Urumqi 830011, China;
    2. Xinjiang Branch of Chinese Academy of Sciences, Urumqi 830011, China;
    3. Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2010-05-18 Revised:2010-08-24 Online:2011-01-30 Published:2011-01-30

摘要: 轮叶马先蒿种子小,数量多,已成为巴音布鲁克草原的入侵种。为有效遏制其入侵,论文通过野外植被调查和室内试验分析,研究了轮叶马先蒿土壤种子库的分布状况及其与生境的关系。结果表明:①土壤含水量是影响轮叶马先蒿种子水平分布的主要因素,土壤种子数量垂直分布表现为枯落物层>腐殖质层>心土层,各层土壤种子数量差异性显著;②轮叶马先蒿土壤种子库的大小与轮叶马先蒿的密度、盖度呈显著正相关,与其他地上植被关系不密切;③土壤含水量是轮叶马先蒿生长生殖的限制因素,轮叶马先蒿产生的花苞数以及产生的种子数量在土壤含水量为0.25时达到最大值,当土壤含水量超过轮叶马先蒿的耐受限度,就不会产生种子,5月下旬和6月上旬是轮叶马先蒿种子萌发的最佳时期;④土壤中有机质含量是轮叶马先蒿生长和繁殖过程中的另一个主要影响因素。

关键词: 轮叶马先蒿, 土壤种子库, 土壤水分

Abstract: Pedicularis verticilata has already become an intrusion species on Bayanbulak grassland with the biological characteristics of small and excessive seed. In order to control its expansion effectively, the distribution characteristics and the relation with habitats of P. verticilata were studied by field vegetable investigation and laboratory testing analysis. We studied the characteristics of horizontal distribution on soil moisture gradient and the characteristics of vertical distribution under the conditions of different soil types by counting method. Constant temperature and varying temperature treatment methods were used from laboratory germination, P.verticilata’s seed germination response to temperature was analyzed. Correlation analysis was used to analyze the relationship between P. verticilata’s seed bank and plant diversity and other soil factors. The result shows that: 1) Soil water content is the main influencing factor for P. verticilata seed’s horizontal distribution. The order of vertical distribution of the seed is litter layer>humus layer>subsoil layer, the amount of seed difference was remarkable between each layer. 2) The amount of seed has a significant positive correlation with P. verticilata’s density and coverage, but has little correlation with other plants. 3) Regarding reproduction and growth, soil water content is the limiting factor. The number of inflorescence and the amount of seed reached maximum when soil water content is 0.25, and no seed will be reproduced seed when soil water content exceeded P. verticilata’s tolerance limitation. Varying temperature is propitious to seed germination, the last ten-day of May and the first ten-day of June were the optimum period of germination, the germination rate reached to 76.9% and 72.4%. 4) Soil organic matter is another main influencing factor for the growth and reproduction of P. verticilata, the correlation coefficient is 0.970 (p<0.01).

Key words: Pedicularis verticilata, seed bank, soil water

中图分类号: 

  • Q948.118