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冰川冻土 ›› 2015, Vol. 37 ›› Issue (3): 635-642.doi: 10.7522/j.issn.1000-0240.2015.0071

• 冰冻圈与全球变化 • 上一篇    下一篇

青藏高原玉树地区巴塘高寒草甸土壤温湿特征分析

张娟1,2, 沙占江2, 徐维新1   

  1. 1. 青海省气象科学研究所, 青海 西宁 810001;
    2. 青海师范大学, 青海 西宁 810001
  • 收稿日期:2014-12-10 修回日期:2015-05-01 出版日期:2015-06-25 发布日期:2015-09-29
  • 通讯作者: 徐维新, E-mail: 23400782@qq.com. E-mail:23400782@qq.com
  • 作者简介:张娟(1979-), 女, 青海西宁人, 高级工程师, 2014年在青海师范大学获硕士学位, 现主要从事生态环境与气候变化研究. E-mail: 7845944@qq.com
  • 基金资助:
    国家自然科学基金项目(41173085);公益性行业专项(GYHY201306054)资助

Variations of alpine meadow soil temperature and moisture in Batang, Yushu region of the Qinghai-Tibet Plateau

ZHANG Juan1,2, SHA Zhanjiang2, XU Weixin1   

  1. 1. Qinghai Institute of Meteorological Science, Xining 810001, China;
    2. Qinghai Normal University, Xining 810001, China
  • Received:2014-12-10 Revised:2015-05-01 Online:2015-06-25 Published:2015-09-29

摘要: 在青藏高原腹地青海省玉树藏族自治州玉树县巴塘高寒草甸草场设立野外试验场, 进行土壤温、湿动态监测. 利用温、湿监测数据及同步气象数据资料, 采用对比分析及线性趋势等方法, 分析了巴塘高寒草甸日、年土壤温、湿变化状况. 结果表明: 土壤温度从10:00时左右开始上升, 至17:00-18:00时达到最高值, 然后开始下降, 在第二天9:00时左右到达最低; 土壤湿度在10:00时达到最低值, 在18:00时达到最大值, 随着土壤深度的增加, 土壤湿度逐渐降低. 土壤温、湿度在不同的季节表现出不同的变化趋势, 二个点不同土层表现出相对一致的变化, 随着土壤深度的增加, 土壤温、湿度逐渐降低; 随着与雪栅距离的增加, 土壤温、湿度的变化幅度减弱; 随着土壤深度的增加, 雪栅的影响也逐渐减小. 通过对土壤温、湿不同时期的特征分析, 5月中旬至8月中旬, 土壤湿度与土壤温度呈现相反的变化趋势, 而在其余时期土壤温湿变化趋势一致; 秋季向冬季转换时, 土壤温湿呈显著下降趋势, 而后土壤进入封冻时期; 冬季向春季转换时, 土壤温湿呈显著上升趋势, 土壤进入解冻时期. 冷季时, 25 cm土壤温度高于5 cm; 暖季时, 5 cm土壤温度高于25 cm.

关键词: 青藏高原, 土壤温度, 土壤湿度, 玉树地区

Abstract: Abstract: The establishment of field test site in Batang alpine meadow, Yushu County, Tibetan Autonomous Prefecture of Yushu, hinterland of the Qinghai-Tibet Plateau, soil temperature and moisture dynamic were monitoried. Using the field every 10min monitoring data of soil temperature and moisture, and meteorological data, we are analysis the varitaions of soil temperature and moisture by linear trend method. Analysis of daily and yearly variations of soil temperature and moisture characteristics, the results showed that: daily soil temperature began to rise from around 10:00, to 17:00, 18:00 reached the highest value, and then began to decline, at about 9:00 to reach the lowestpoint; the soil moisture reaches a minimum value at about 10:00, reached a maximum at about 18:00, with the increase of soil depth, the soil moisture decreased; soil temperature and moisture showed a different trend in different seasons, two different soil showed a relatively uniform change, with the increase of soil depth; soil temperature and moisture decreased gradually with increasing distance from the snow fence; with the increase of soil depth, influence of snow fence also decreased gradually. Through the analysis of soil temperature and moistureof different periods, by the middle of August from mid-May, soil moisture and soil temperature is opposite variation tendency, while in the rest period, the soil temperature and moisture change trend; fall to winter conversion, the soil temperature and moisture were significantly decreased, and soil into the frozen period, the winter to spring conversion, soil temperature and moisture increased, soil into the thawing period; cold season, 25 cm depth soil temperature is higher than 5 cm depth; warm season, 5 cm depth soil temperature is higher than 25 cm depth.

Key words: Qinghai-Tibet Plateau, soil temperature, soil moisture, Yushu region

中图分类号: 

  • S152.6