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  

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

作　　者：聂婷婷 董乙强 杨合龙[1,2,3] 阿斯太肯·居力海提 周时杰 安沙舟[1,2,3] NIE Tingting;DONG Yiqiang;YANG Helong;Asitaiken Julihaiti;ZHOU Shijie;AN Shazhou(College of Grassland Science,Xinjiang Agricultural University,Urumqi 830052,China;Key Laboratory of Grassland Resources and Ecology of Xinjiang Autonomous Region,Xinjiang Agricultural University,Urumqi 830052,China;Key Laboratory of Grassland Ecology and Resources in Western Arid Zone,Ministry of Education,Xinjiang Agricultural University,Urumqi 830052,China)

机构地区：[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

出　　处：《中国农业科技导报》2023年第3期178-187,共10页Journal of Agricultural Science and Technology

基　　金：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。

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。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.

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 

分 类 号：S714.2[农业科学—林学]