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氮添加对油蒿群落植物叶片生态化学计量特征的影响

张文瑾 张宇清 佘维维 秦树高 冯薇

张文瑾, 张宇清, 佘维维, 秦树高, 冯薇. 氮添加对油蒿群落植物叶片生态化学计量特征的影响[J]. 环境科学研究, 2016, 29(1): 52-58.
引用本文: 张文瑾, 张宇清, 佘维维, 秦树高, 冯薇. 氮添加对油蒿群落植物叶片生态化学计量特征的影响[J]. 环境科学研究, 2016, 29(1): 52-58.
ZHANG Wenjin, ZHANG Yuqing, SHE Weiwei, QIN Shugao, FENG Wei. Effects of Nitrogen Addition on Foliar Ecological Stoichiometric Characteristics of Artemisia ordosica Community[J]. Research of Environmental Sciences, 2016, 29(1): 52-58.
Citation: ZHANG Wenjin, ZHANG Yuqing, SHE Weiwei, QIN Shugao, FENG Wei. Effects of Nitrogen Addition on Foliar Ecological Stoichiometric Characteristics of Artemisia ordosica Community[J]. Research of Environmental Sciences, 2016, 29(1): 52-58.

氮添加对油蒿群落植物叶片生态化学计量特征的影响

基金项目: 国家自然科学基金项目(31470711);北京林业大学科学创新计划项目(TD2011-04)

Effects of Nitrogen Addition on Foliar Ecological Stoichiometric Characteristics of Artemisia ordosica Community

  • 摘要: 为了深入认识荒漠植物对氮沉降的适应和反馈能力,研究了宁夏盐池毛乌素沙地油蒿(Artemisia ordosica)群落内5种优势植物〔油蒿、披针叶黄华(Thermopsis lanceolata)、糙隐子草(Cleistogenes squarrosa)、赖草(Leymus secalinus)、刺藜(Chenopodium aristatum)〕在N0、N1、N2、N3、N4、N5〔氮添加水平依次为0、0.5、1.0、2.0、3.0、6.0 g/(m2·a),以N计〕6个氮添加处理下叶片w(TC)、w(TN)、w(TP)及其化学计量比——C/N〔w(TC)/w(TN)〕、N/P〔w(TN)/w(TP)〕、C/P〔w(TC)/w(TP)〕的变化. 结果表明:①氮添加对油蒿、披针叶黄华叶片w(TC)、w(TN)、w(TP)及其化学计量比无显著影响. ②高氮添加(N5处理)显著增加了糙隐子草、赖草和刺藜叶片w(TN),相对于N0处理时增幅分别约为26%、81%和60%. ③高氮添加显著增加了赖草、刺藜叶片N/P,但显著降低了其叶片C/N,其中,赖草和刺藜叶片N/P相对于N0处理时的增幅分别约为86%和61%,C/N的降幅则分别约为45%和37%. 研究显示,油蒿群落中不同植物种对氮添加的响应存在差异,持续增加的氮沉降很可能会引起油蒿群落物种组成的变化,从而影响油蒿群落的演替.

     

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  • 收稿日期:  2015-06-24
  • 修回日期:  2015-09-17
  • 刊出日期:  2016-01-25

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