Journal of Agricultural Science and Technology ›› 2023, Vol. 25 ›› Issue (3): 178-187.DOI: 10.13304/j.nykjdb.2022.0474

• BIO-MANUFACTURING & RESOURCE AND ECOLOGY • Previous Articles    

Effects of Enclosure on Plant and Soil Stoichiometric Characteristics in an Artemisia Desert

Tingting NIE1(), Yiqiang DONG1,2,3(), Helong YANG1,2,3, Asitaiken Julihaiti1, Shijie ZHOU1, Shazhou AN1,2,3   

  1. 1.College of Grassland Science, Xinjiang Agricultural University, Urumqi 830052, China
    2.Key Laboratory of Grassland Resources and Ecology of Xinjiang Autonomous Region, Xinjiang Agricultural University, Urumqi 830052, China
    3.Key Laboratory of Grassland Ecology and Resources in Western Arid Zone, Ministry of Education, Xinjiang Agricultural University, Urumqi 830052, China
  • Received:2022-06-05 Accepted:2022-06-30 Online:2023-03-15 Published:2023-05-22
  • Contact: Yiqiang DONG

围栏封育对蒿类荒漠植物-土壤碳氮磷化学计量特征的影响

聂婷婷1(), 董乙强1,2,3(), 杨合龙1,2,3, 阿斯太肯·居力海提1, 周时杰1, 安沙舟1,2,3   

  1. 1.新疆农业大学草业学院,乌鲁木齐 830052
    2.新疆农业大学新疆草地资源与生态自治区重点实验室,乌鲁木齐 830052
    3.新疆农业大学西部干旱区草地资源与生态教育部重点实验室,乌鲁木齐 830052
  • 通讯作者: 董乙强
  • 作者简介:聂婷婷 E-mail:1783239058@qq.com
  • 基金资助:
    天山青年计划项目;新疆农业大学高层次人才科研培育计划项目

Abstract:

In order to clarify the response of Artemisia desert plant stems, leaves, roots and soil carbon (C), nitrogen (N) and phosphorus (P) contents and their stoichiometric characteristics to fencing, the vegetation and soil C, N and P contents of desert grassland in the fenced area(2 years) and the grazed area were measu and analyze. The results showed that, compared with the grazed area, short-term sealing had no significant effect on the C, N and P contents of Artemisia desert plant community stems, leaves and roots, while the N∶P ratio of plant community stems was significantly reduced by 14.27%. The C content, C∶N and C∶P ratios of the roots in the 20—30 cm soil layer of the closed area increased significantly by 45.00%, 80.72% and 41.58% compared to the grazed area, while the N content and N∶P ratio of the 30—50 cm roots decreased significantly by 21.81%, 37.56% and 22.22% compared to the grazed area. However, P content significant increased by 22.22% and C∶N of the 50—70 cm root system also increased significantly by 64.53%. Short-term sealing significantly reduced N by 36.76% in the 0—5 cm soil, 37.34% and 25.35% in the 5—10 cm soil and 12.5% in the 50—70 cm soil, respectively. In addition, soil C:P at 20—30 cm and soil N:P at 10—20 cm were significantly reduced by 36.93% and 23.45%, respectively, in the blocked area. Therefore, short-term sealing did not achieve the effect of vegetation and soil restoration, and a combination of measures should be taken to promote the restoration of degraded grassland, such as extending the sealing period and adding phosphorus fertiliser.

Key words: enclosure, Artemisia desert, vegetation nutrients, soil nutrients, stoichiometric characteristics

摘要:

为明确蒿类荒漠植物茎、叶、根和土壤碳(C)、氮(N)、磷(P)含量及其化学计量特征对围栏封育的响应规律,对封育区(2年)和放牧区荒漠草地植被及其土壤C、N、P含量进行测定分析。结果表明,与放牧区相比,短期封育对蒿类荒漠植物群落茎、叶和根系C、N和P含量影响不显著,而植物群落茎氮磷比(N∶P)显著降低14.27%。封育区20—30 cm土层中的根系C含量、碳氮比(C∶N)、碳磷比(C∶P)相较于放牧区显著增加45.00%、 80.72%、41.58%;而30—50 cm根系的N含量、N∶P显著降低 21.81%、37.56%, 但P含量显著增加22.22%;50—70 cm根系C∶N也显著增加64.53%。与放牧区相比,短期封育后0—5 cm土壤N显著降低36.76%;5—10 cm土壤N和P含量分别显著降低37.34%和25.35%;50—70 cm土壤P含量显著降低12.5%。此外,封育区20—30 cm土壤C∶P和10—20 cm土壤N∶P显著降低36.93%和23.45%。因此,短期封育没有达到植被、土壤恢复的效果,应加长封育年限,采取添加磷肥等综合措施促进退化草地的恢复。

关键词: 围栏封育, 蒿类荒漠, 植被养分, 土壤养分, 化学计量特征

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