辽西地区春播期土壤湿度变化特征及气象影响因子分析
王小桃;李辑;晁华;李晶;张海娜;马晓刚
【期刊名称】《干旱地区农业研究》 【年(卷),期】2014(000)004
【摘要】The variation characteristics of soil moisture and precipitation and
their
relationship
in
western
Liaoning
Province
were
discussed ,using the data of soil moisture ,precipitation and temperature from 1981 to 2011 .The results showed that the soil moisture showed a remarkable desiccation trend and the precipitation in the same period was not the only influencing factor .There was a positive correlation between soil moisture at spring sowing period and precipitation of last autumn ,and the correlation coefficient was 0 .69 in deep layer;there was a significant positive correlation between soil moisture at spring sowing period and soil moisture before freezing ,and the correlation coefficient was 0 .84 at most . Such a positive correlation was due to the freezing rain that was special in northern China .The autumn rainwater could be frozen in soil in winter and be thawed in the following spring ,making the soil to become moist .Soil moisture in May showed a positive correlation with precipitation in the same period ,and the correlation coefficient was 0 .67 in shallow layer;however ,it showed a negative correlation with temperature ,and the correlation coefficient was -0 .58 in deep layer .%利用1981-2011年辽西地区土壤相对湿度、降水
辽西地区春播期土壤湿度变化特征及气象影响因子分析
