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中国沙漠 ›› 2022, Vol. 42 ›› Issue (1): 71-78.DOI: 10.7522/j.issn.1000-694X.2021.00127

• • 上一篇    下一篇

风沙活动对人工梭梭(Haloxylon ammodendron)林土壤碳氮含量的影响

马全林1,2(), 尚雯3(), 王新友4, 马婧5(), 詹科杰2, 王多泽2   

  1. 1.甘肃省治沙研究所,甘肃省荒漠化与风沙灾害防治国家重点实验室培育基地,甘肃 兰州 730070
    2.甘肃省治沙研究所,甘肃民勤荒漠草地生态系统国家野外科学观测研究站,甘肃 兰州 730070
    3.西北民族大学,甘肃 兰州 730030
    4.甘肃广播电视大学,甘肃 兰州 730030
    5.中国农业大学 草业科学与技术学院,北京 100193
  • 收稿日期:2021-06-19 修回日期:2021-10-09 出版日期:2022-01-20 发布日期:2022-01-28
  • 通讯作者: 尚雯,马婧
  • 作者简介:马婧(E-mail: mjtwoseven@163.com
    尚雯(E-mail: shenwem24@163.com
    马全林(1974—),男,甘肃陇西人,博士,研究员,主要从事荒漠化防治与生态恢复研究。E-mail: mql925@126.com
  • 基金资助:
    国家自然科学基金项目(32160410);国家重点研发计划项目(SQ2016YFHZ020617);甘肃省科技重大专项(18ZD2FA009);甘肃省青年科技人才托举工程项目

Influence of sand blown activity on soil organic carbon and total nitrogen in artificial Haloxylon ammodendron plantations in arid desert regions

Quanlin Ma1,2(), Wen Shang3(), Xinyou Wang4, Jing Ma5(), Kejie Zhan2, Duoze Wang2   

  1. 1.State Key Laboratory Breeding Base of Desertification and Aeolian Sand Disaster Combating /, Gansu Desert Control Research Institute,Lanzhou 730070,China
    2.Gansu Minqin National Station of Desertification Pasture Ecology System Research, Gansu Desert Control Research Institute,Lanzhou 730070,China
    3.Northwest Minzu University,Lanzhou 730030,China
    4.Gansu Radio & Television University,Lanzhou 730030,China
    5.College of Glassland Science and Technology,China Agricultural University,Beijing 100193,China
  • Received:2021-06-19 Revised:2021-10-09 Online:2022-01-20 Published:2022-01-28
  • Contact: Wen Shang,Jing Ma

摘要:

风沙活动及其物质输移是关键的陆地地表过程,对沙地生态系统影响显著。以石羊河下游民勤县不同林龄人工梭梭(Haloxylon ammodendron)林为研究对象,研究了固沙造林对0—1 m深度土壤碳氮含量的影响以及风蚀和降尘引起的碳氮含量变化特征,探讨了风沙活动对人工梭梭林土壤碳氮库的影响。结果表明:35 a人工梭梭林0—1 m和0—5 cm土壤有机碳储量较流动沙丘分别增长2.5倍和4.6倍,土壤氮储量分别增长3.3倍和5.3倍。地表风沙流被人工梭梭林截留引起的碳氮输入速率5年平均值分别为1.12 g?m-2?a-1和0.15 g?m-2?a-1,占35 a林地0—1 m土壤有机碳氮固定速率的2.2%和1.8%,占0—5 cm土壤有机碳氮固定速率的21.5%和24.9%。在人工梭梭林下垫面上,降尘引起的碳氮输入速率5年平均值分别为2.47 g?m-2?a-1和0.29 g?m-2?a-1,占到35 a林地0—1 m土壤有机碳氮固定速率的4.7%和3.5%,占0—5 cm土壤有机碳氮固定速率的45.7%和48.1%,是地表风沙流的近2倍。人工梭梭林对风沙流活动的削减作用显著促进了沙漠土壤有机碳氮的积累,在0—5 cm层更为明显。

关键词: 风蚀, 降尘, 人工梭梭(Haloxylon ammodendron)林, 土壤有机碳, 全氮

Abstract:

Wind activity and its material transportation are the key terrestrial progresses, which have significant impact on sandy land ecosystem. In this study, the artificial Haloxylon.ammodendron plantations in Minqin County at the lower reaches of Shiyang River were selected as research objects, we evaluated effects of sand fixation afforestation on soil carbon and nitrogen at 0-1 m depth, and change characteristics of carbon and nitrogen caused by wind erosion and dustfall. Our aim was to explore the effects of wind activity on soil organic carbon (SOC) and total nitrogen (TN) storages in artificial plantations. The results showed that SOC storages in 0-1 m and 0-5 cm increased by 2.5 and 4.6 times, and TN storages in 0-1 m and 0-5 cm increased 3.3 and 5.3 times in 35-year-old H. ammodendron plantations compared to mobile sand dunes, respectively. The 5-year averaged carbon and nitrogen input rates caused by near-surface wind-blown intercepted by artificial H. ammodendron plantations were 1.12 g?m2?a-1 and 0.15 g?m2?a-1, accounting for 2.2% and 1.8% of SOC and TN fixed rates in 0-1 m, and 21.5% and 24.9% of SOC and TN fixed rates in 0-5 cm in 35-year-old H.ammodendron plantations, respectively. The 5-year averaged carbon and nitrogen input rates caused by dustfall intercepted by artificial H. ammodendron plantations were 2.47 g?m2?a-1 and 0.29 g?m2?a-1, accounting for 4.7% and 3.5% of SOC and TN fixed rates in 0-1 m, and 45.7% and 48.1% of SOC and TN fixed rates in 0-5 cm in 35-year-old H. ammodendron plantations, respectively. The carbon and nitrogen fixed by dustfall activity was is nearly twice that of near-surface wind-blown. Our results conclude that the reduction of artificial H.ammodendron plantations on sand blown activity activity can significantly promote SOC and TN accumulation in 0-1 m soil layer in sandy land, which was more obvious in 0-5 cm soil layer.

Key words: wind erosion, dustfall, artificial Haloxylon ammodendron, soil organic carbon, total nitrogen

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