摘要
浅层地温是影响区域气候的环境因素之一,对浅层地温研究有利于掌握其变化规律和特征,可为区域工农业生产可持续发展服务。利用统计学方法对辽宁西部1959—2011年0～320 cm的6个层次地温变化特征进行分析。结果表明,各个层次地温年变化均具有升高趋势,但具有不同的温度倾向率,其中,0 cm温度倾向率最大,其次是320 cm,40 cm的倾向率最小;除0 cm地温历年变化突变点在1985年外,其他各层次的地温历年变化的突变点均在1987年,但各层次温变过渡区间有所差异;各层次地温季节变化随着深度的增加,最高、最低温度出现时间逐次后推,浅层地温纵向40 cm深温度低于其他任何层次,并以0 cm最高,320 cm次之,浅层地温的升高将影响植物萌芽越冬及根系生长,影响土壤生物繁殖和分布。研究结果可为辽西半干旱地区工农业生产、生态环境治理提供依据。
Shallow geotemperature is one of the environmental factors affecting regional climates.Research on shallow geotemperature is conducted to understand its variation and characteristics and make use for sustainable development of regional industrial and agricultural production.This article studied the variation characteristics of the geotemperature of 0～320 cm thick strata with statistical methods in six levels from 1959 to 2011 in western Liaoning.The results indicate that the annual change of geotemperature from different level share the same increasing trend but unequal trend rates.0 cm level had the maximum tendency,followed by 320 cm and 40 cm at the minimum.Except 0 cm level with saltation year in 1985,other levels share the same saltation year in 1987.There were differences among temperature transition section of each level.Along with depth increasing gradually,the emergence of the highest and the lowest temperature delayed in all levels of geotemperature.From the vertical perspective,shallow temperature at the depth of 40 cm was lower than any other levels and 0 cm was the highest,then followed by 320 cm.The increased shallow geotemperature would affect plants sprouting and overwintering,root growth,reproduction and distribution of soil organisms.This research provides a reference for industrial and agricultural development and ecological management in the semi-arid areas of western Liaoning.
出处
《山西农业科学》
2013年第8期852-855,共4页
Journal of Shanxi Agricultural Sciences
基金
辽宁省自然科学基金项目(20102109)
关键词
辽宁西部
浅层地温
倾向率
过渡区间
突变点
western Liaoning
shallow geotemperature
trend rate
transition section
saltation point
