Variation of Soil Water Infiltration and the Influence of Aggregates in Degraded Alpine Meadow in Eastern Qilian Mountains

doi:10.11733/j.issn.1007-0435.2020.02.026

Acta Agrestia Sinica ›› 2020, Vol. 28 ›› Issue (2): 500-508.DOI: 10.11733/j.issn.1007-0435.2020.02.026

Variation of Soil Water Infiltration and the Influence of Aggregates in Degraded Alpine Meadow in Eastern Qilian Mountains

ZHANG Yu-qi¹, LIANG Ting¹, ZHANG De-gang¹, SUN Bin², WU Yu-xin¹, MA Yuan¹, YAO Yu-jiao¹, XIAO Hai-long¹, ZHOU Hui-cheng¹, JI Tong¹, CHEN Jian-gang¹, CHEN Wei³

1. College of Pratacultural Science, Gansu Agricultural University, Key Laboratory of Grassland Ecosystem of Education Ministry, Sino-U. S. Centers for Grazingland Ecosystem Sustainability, Lanzhou, Gansu Province 730070, China;
2. Grassland Technique Extension Station of Gansu Province, Lanzhou, Gansu Province 730000, China;
3. Geography and Engineering College, Lanzhou City University, Lanzhou, Gansu Province 730070, China

Received:2019-11-27 Revised:2020-01-18 Online:2020-04-15 Published:2020-04-11

祁连山东段退化高寒草甸土壤水分入渗的变化及团聚体对水分入渗的影响

张玉琪¹, 梁婷¹, 张德罡¹, 孙斌², 吴玉鑫¹, 马源¹, 姚玉娇¹, 肖海龙¹, 周会程¹, 纪童¹, 陈建纲¹, 陈伟³

1. 甘肃农业大学草业学院, 草业生态系统教育部重点实验室, 中美草地畜牧业可持续发展研究中心, 甘肃兰州 730070;
2. 甘肃省草原技术推广总站, 甘肃兰州 730000;
3. 兰州城市学院地理与环境工程学院, 甘肃兰州 730070

通讯作者: 张德罡
作者简介:张玉琪(1997-),女,山西大同人,硕士研究生,主要从事草地资源与生态研究,E-mail:694052219@qq.com
基金资助:
甘肃省草原技术推广总站“草原生态状况评价技术规范研究”（034-036272）；甘肃省草原技术推广总站“中国两大草原分类系统在甘肃草原普查中的耦合研究”（034-036237）共同资助

Abstract

Abstract: In order to explore the characteristics of soil water infiltration and the affecting factors in degraded alpine meadow,the degraded alpine meadow in the eastern part of Qilian Mountain was selected as the research site to study the changes of soil water infiltration rate,mechanical composition and aggregates,and the influence of soil aggregate on soil water infiltration. The results showed that along with the aggravation of degradation and the increase of soil depth,soil water infiltration rate showed a decreasing trend (P<0.05),the soil aggregates changed from large size to small size. There was a significant positive correlation between the water infiltration rate and the contents of soil organic matter,sand,silt,porosity and large aggregates (P<0.05),and the water infiltration rate showed a significant negative correlation with soil bulk density,clay particles and soil microaggregates (P<0.05). In conclusion,the soil structure becomes worse during the degradation of alpine meadow,which is featured with the decrease of large-size aggregates proportion resulted in the decrease of soil water infiltration capacity.

Key words: Degradation, Alpine meadow, Infiltration, Aggregate, Soil mechanical composition, Soil organic matter

摘要： 为探明退化高寒草甸土壤水分入渗特征及其影响因子，本试验以祁连山东段退化高寒草甸为对象，研究了不同退化程度高寒草甸土壤水分入渗率、机械组成和团聚体的变化，探讨了团聚体特性对土壤水分入渗的影响。结果表明：随着高寒草甸退化程度的加剧和土层深度的增加，土壤水分入渗率均表现出逐渐降低的趋势（P<0.05），土壤团聚体由大粒径为主向小粒径为主改变；水分入渗率与土壤有机质含量、砂粒含量、粉粒含量、孔隙度、大粒径团聚体含量之间具有显著的正相关性（P<0.05），与土壤容重、黏粒含量、土壤微团聚体含量之间具有显著的负相关性（P<0.05）。综上所述，随着高寒草甸退化程度的加剧，土壤中大团聚体含量减小，导致土壤孔隙度下降，土壤水分的入渗能力逐渐降低，水源涵养能力变差。

关键词: 退化, 高寒草甸, 入渗, 团聚体, 土壤机械组成, 土壤有机质

CLC Number:

S812

ZHANG Yu-qi, LIANG Ting, ZHANG De-gang, SUN Bin, WU Yu-xin, MA Yuan, YAO Yu-jiao, XIAO Hai-long, ZHOU Hui-cheng, JI Tong, CHEN Jian-gang, CHEN Wei. Variation of Soil Water Infiltration and the Influence of Aggregates in Degraded Alpine Meadow in Eastern Qilian Mountains[J]. Acta Agrestia Sinica, 2020, 28(2): 500-508.

张玉琪, 梁婷, 张德罡, 孙斌, 吴玉鑫, 马源, 姚玉娇, 肖海龙, 周会程, 纪童, 陈建纲, 陈伟. 祁连山东段退化高寒草甸土壤水分入渗的变化及团聚体对水分入渗的影响[J]. 草地学报, 2020, 28(2): 500-508.

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Variation of Soil Water Infiltration and the Influence of Aggregates in Degraded Alpine Meadow in Eastern Qilian Mountains

祁连山东段退化高寒草甸土壤水分入渗的变化及团聚体对水分入渗的影响

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