欢迎访问《应用生态学报》官方网站,今天是 分享到:

应用生态学报 ›› 2019, Vol. 30 ›› Issue (8): 2558-2566.doi: 10.13287/j.1001-9332.201908.026

• • 上一篇    下一篇

不同立地铁杆蒿化学计量特征及其与土壤养分的关系

吴会峰1, 王菁菁1, 宋丽娟2, 李刚1, 吴水娟3, 郝文芳1*   

  1. 1西北农林科技大学生命科学学院, 陕西杨凌 712100;
    2沧州师范学院生命科学学院, 河北沧州 061000;
    3山东鲁勘工程检测鉴定有限公司, 济南 250000
  • 收稿日期:2018-08-21 出版日期:2019-08-15 发布日期:2019-08-15
  • 通讯作者: * E-mail: haowenfang@nwsuaf.edu.cn
  • 作者简介:吴会峰,男,1993年生,硕士研究生.主要从事植被生态学研究.E-mail:wuhuifeng2015@163.com
  • 基金资助:
    2017年中医药公共卫生服务补助专项“全国中药资源普查项目(米脂县)”(财社[2017]66号,K3090218003)和“全国中药资源普查项目(吴堡县)”(财社[2017]66号,K3090218004)

Stoichiometric characteristics of Artemisia sacrorum communities under different site conditions and their correlation with soil nutrients

WU Hui-feng1, WANG Jing-jing1, SONG Li-juan2, LI Gang1, WU Shui-juan3, HAO Wen-fang1*   

  1. 1College of Life Sciences, Northwest A&F University, Yangling 712100, Shaanxi, China;
    2College of Life Science, Cangzhou Normal University, Cangzhou 061000, Heibei, China;
    3Lukan Engineering Testing & Appraisal Co. Ltd., Jinan 250000, China.

  • Received:2018-08-21 Online:2019-08-15 Published:2019-08-15
  • Contact: * E-mail: haowenfang@nwsuaf.edu.cn

摘要: 以陕西吴起杨青川流域铁杆蒿群落为研究对象,结合坡向、坡位及土壤养分变化探究不同立地铁杆蒿群落化学计量特征及其与土壤养分的关系.结果表明:从峁顶、阳坡、半阴坡到阴坡,铁杆蒿地上部分和根有机碳、全氮、全磷含量、碳氮比均逐渐增大;地上部分碳磷比和根氮磷比呈减小趋势;地上部分氮磷比、根碳磷比先减小后增大.从峁顶、上坡位、中坡位到下坡位,地上部分有机碳、全氮、全磷含量以及根有机碳含量先增加后减小;地上部分碳氮比、氮磷比先减小后增大.铁杆蒿群落植物化学计量特征一般与土壤化学计量特征呈正相关,但碳氮比、碳磷比、氮磷比及根全磷与土壤相应指标呈负相关,且植物地上部分与土壤的相关性大于根.综上,不同立地铁杆蒿群落植物在阴坡中坡位生长状态最佳,其化学计量特征与土壤养分状况具有明显的相关关系.坡向和坡位在铁杆蒿群落植物和土壤的化学计量特征中具有重要影响,适宜的铁杆蒿群落将有利于土壤养分的恢复.

Abstract: We explored the stoichiometric characteristic of Artemisia sacrorum communities and its correlation with soil characters by considering the aspect and slope position, and variation of soil nutrient in Yangqingchuan catchment of Wuqi. Our results showed that total carbon, total nitrogen, total phosphorus contents and C:N ratio in A. sacrorum (both shoot and root) in the top of hillock>sunny slope>semi-shady slope>shady slope. The C:P ratio in shoot and the N:P ratio in root decreased consistently. The N:P ratio in shoot and the C:P ratio in root decreased first and then increased. While the total nitrogen and total phosphorus in shoot, and the organic carbon in root increased first and then decreased with the decreases of slope position, the C:N ratio and N:P ratio in shoot decreased first and then increased. The stoichiometric characteristic of A. sacrorum communities was positively correlated with the soil stoichiometric characteristics. However, the C:N ratio, C:P ratio and N:P ratio of A. sacrorum and the total phosphorus of root were negatively correlated to corresponding soil indices. The correlation between shoot nutrition and soil was greater than that between soil and root nutrition. In conclusion, middle position of shady slope was optimal for the growth of A. sacrorum. The stoichiometric characteristics of plants were significantly correlated with soil nutrient condition. Aspect and slope position had a significant effect on the stoichiometric cha-racteristics of A. sacrorum community and soil. Proper A. sacrorum community could help restore soil nutrition.