摘要
吉林省位于季节性冻土区,春季土温较低,冻土解冻、土温上升需要一个过程。土壤耕层温度的变化和土壤化冻深度对春耕春播影响较大,当10 cm土温稳定通过7℃、土壤化冻深度超过30 cm以上才能播种。为了保证安全播种,有必要开展土温的监测和预报。目前,气象部门有相关的监测,但是相关的预报却没有开展。分析吉林省西部、中部和东部各2个代表性气象站资料,结果表明:土温与平均气温、土壤化冻深度与正积温有很好的相关性,可以通过相关模型开展土壤温度和土壤化冻深度预报。模型的建立能够很好的指导农业生产,为吉林的农业生产保驾护航。
Topsoil temperature and thawing dept h of frozen soil in the seasonally frozen regions were essential to agricultural production. Although topsoil temperature was very low at the beginning of spring, the frozen soil layer thawed gradually. When the temperature at 10 cm depth of topsoil was higher than 7 ℃ and the thawing depth of frozen soil was higher than 30 cm, it was suitable time to sow. This paper analyzed the meteorological data from 6meteorological stations in western, central, and eastern regions of Jilin Province. The result showed that there were significant correlations between thawing depth of frozen soil and positive cumulative temperature. And it was possible to forecast topsoil temperature and thawing depth of frozen soil by using predicting models. The results would provide application guidance for agricultural production.
出处
《土壤通报》
CAS
CSCD
北大核心
2016年第2期334-338,共5页
Chinese Journal of Soil Science
基金
吉林气象局科研课题面上项目(2014009)资助
关键词
土壤
化冻
预报
春耕春播
Soil
Thawing
Forecast
Spring sowing
