草业学报 ›› 2014, Vol. 23 ›› Issue (6): 45-53.DOI: 10.11686/cyxb20140606
徐沙,龚吉蕊*,张梓榆,刘敏,王忆慧,罗亲普
收稿日期:
2014-04-08
出版日期:
2014-12-20
发布日期:
2014-12-20
通讯作者:
E-mail:jrgong@bnu.edu.cn
作者简介:
徐沙(1989-),女,山东菏泽人,在读硕士
基金资助:
XU Sha,GONG Ji-rui,ZHANG Zi-yu,LIU Min,WANG Yi-hui,LUO Qin-pu
Received:
2014-04-08
Online:
2014-12-20
Published:
2014-12-20
摘要: 在内蒙古温带草原围封、放牧和割草3种不同利用方式下,测定了大针茅、冷蒿和羊草3种优势种植物的化学计量元素,探讨了草地不同利用方式下优势种植物的化学计量特征响应机制。结果表明,3种优势种植物的C、N、P含量及其计量比在不同利用方式下均有明显的季节变化;不同利用方式、不同物种以及二者的交互作用均对N、P含量及C∶N、C∶P和N∶P有显著的影响,其中,C含量比较稳定,不同的利用方式对其无显著影响,N含量在整个生长季内总体呈下降趋势,放牧样地3种植物叶片的N、P含量均高于割草和围封样地,说明放牧增加了植物N、P的含量。植物生长普遍受到N的限制,土壤养分特征在不同利用方式间也存在一定的差异,围封样地表现为更加缺N,而放牧样地更加缺P。放牧样地有机质、C、N和P含量均高于割草和围封样地,说明适度放牧能提高土壤养分的含量,有利于植物的生长。
中图分类号:
徐沙,龚吉蕊,张梓榆,刘敏,王忆慧,罗亲普. 不同利用方式下草地优势植物的生态化学计量特征[J]. 草业学报, 2014, 23(6): 45-53.
XU Sha,GONG Ji-rui,ZHANG Zi-yu,LIU Min,WANG Yi-hui,LUO Qin-pu. The ecological stoichiometry of dominant species in different land uses type of grassland[J]. Acta Prataculturae Sinica, 2014, 23(6): 45-53.
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