河南雨养农业区土壤水分与气候变化的关系

Analysis of Relationship on Soil Moisture and Climate Change in Rain-fed Agricultural Areas of Henan Province

利用河南省8个农业气象观测站1981-2005年的气象和土壤水分观测资料进行分析,结果表明:①河南省近25 a来的年平均气温以0.05℃/a的速度上升,年降水量变化不明显;②土壤水分与气温呈极显著的负相关关系,而与降水呈极显著的正相关关系。得出:受气候变暖的影响,近25 a来河南省雨养农业区土壤水分呈明显下降趋势。

Based on the data of the meteorological and soil moisture of eight agro - meteorological observation stations from 1981 to 2005 in Henan Province, the relationship on soil moisture and climate change in the rain - fed agricultural areas of Henan Province was analyzed. The results showed that the mean annual temperature increased averagely by 0.05℃ per year in the last 25 years, and the variation of annual precipitation was not observed. The soil moisture was negatively related to the temperature and positive related to the precipitation significantly. Due to the influence of warming up, the soil moisture in the rainfed farming areas in Henan Province showed a decreased tendency in recent 25 years.