| 祁连山北麓不同海拔土壤化学计量特征 |
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| 引用本文： | 高海宁,李彩霞,孙小妹,张勇,陈年来.祁连山北麓不同海拔土壤化学计量特征[J].中国沙漠,2021,41(1):219-227. |
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| 作者姓名： | 高海宁 李彩霞 孙小妹 张勇 陈年来 |
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| 作者单位： | 1.甘肃农业大学 资源与环境学院，甘肃 兰州 730070;2.河西学院 甘肃省河西走廊特色资源利用省级重点实验室，甘肃 张掖 734000 |
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| 基金项目： | 甘肃省重点研发计划项目(1504FKCA003)。 |
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| 摘 要： | 对祁连山中段冰沟流域土壤有机C、N、P含量垂直分布与化学计量特征及其影响因素进行研究。结果表明：冰沟流域土壤有机C、N、P含量在各样点随土层深度而降低，并在表层土中聚集较明显；在0—40 m土层中，土壤有机C、N、P平均含量随海拔升高总体呈现先增高后下降的趋势，在中、高海拔处最高，P含量变异较小。0—40 cm土层中土壤C/N在海拔3 128—2 814 m处高于其他海拔，在3 075 m处C/N最高，土壤C/N、C/P随海拔升高总体呈下降趋势，均在中高海拔处最高，而土壤N/P在海拔3 454 m处最高，在低海拔2 814 m处最低。不同植被类型土壤的C/N、N/P差异性不显著，而土壤SOC/P差异显著，3种植被类型影响土壤C/N和C/P的大小为乔木林>高山灌丛>高山草地，而土壤N/P为灌丛>乔木林>高山草地；植被类型、海拔是影响土壤C、N、P含量和化学计量比的主要因素，其次为盖度、坡向。
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| 关 键 词： | 祁连山 海拔 土壤 化学计量比 |
| 收稿时间： | 2020-09-08 |
| 修稿时间： | 2020-11-24 |
Stoichiometry characteristics of soil at different altitudes in the Qilian Mountains |
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| Gao Haining,Li Caixia,Sun Xiaomei,Zhang Yong,Chen Nianlai.Stoichiometry characteristics of soil at different altitudes in the Qilian Mountains[J].Journal of Desert Research,2021,41(1):219-227. |
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| Authors: | Gao Haining Li Caixia Sun Xiaomei Zhang Yong Chen Nianlai |
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| Institution: | 1.College of Resource and Environmental Sciences，Gansu Agricultural University，Lanzhou 730070，China;2.Key Laboratory of Hexi Corridor Resources Utilization of Gansu，Hexi University，Zhangye 734000，Gansu，China |
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| Abstract: | To elucidate the vertical distribution of soil organic carbon(C),nitrogen(N)and phosphorus(P)concentration in Qilian Mountain northern foot,the eco-stoichiometric characteristics at different elevations and their influencing factors were discussed.The results showed that the soil SOC,N and P content decreased with the increase of soil depth,and the significant aggregation was observed at topsoil;In the 0-40 cm soil layer,the average contents of soil SOC,N and P showed a trend of rising first and then declining with the increase of altitude,and reached the highest at the middle and high altitude area.Notably,the variation of P content is small and relatively stable.The C/N was higher at attitude of 3128-2814 m,and especially,the highest at 3075 m.However,soil C/P and N/P showed a downward trend with the increase of altitude,and they were all the highest at the middle and high altitude area,while soil N/P showed the highest level at 3454 m and the lowest level at 2814 m.Meanwhile,there was no significant difference in soil C/N and N/P among different land types but significant difference in C/P.The effects of the three vegetation types on soil C/N and C/P were:arbor forest>alpine shrub>alpine grassland,while N/P was:alpine shrub>arbor forest>alpine grassland.Vegetation type and altitude are the main factors affecting the eco-stoichiometric ratio of soil C,N and P,followed by coverage and slope aspect. |
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| Keywords: | Qilian Mountains altitude soil stoichiometry ratio |
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