锦州玉米地地下水位、降水与土壤含水量的关系分析

Relationship Between Underground Water Level and Precipitation,Soil Moisture in Maize Field in Jinzhou

本文通过研究1985～2007年间的锦州玉米地地下水位、降水和土壤含水量的观测资料,旨在阐述锦州农田可利用水分的变化规律及其影响因子。结果表明:当地下水位小于4m时,锦州玉米地地下水位与土壤含水量呈负相关关系在相同地下水位条件下,土壤含水量受地下水位的影响随土层深度加深而变强。锦州玉米地生长季不同月份0～30cm土壤含水量大小排序为8月>7月>5月>6月>9月在年时间尺度上,生长季的降水与地下水位呈显著的负相关。

Aiming to explore the change law of available water and its influencing factors for maize field in Jinzhou, the data of underground water table, precipitation and soil moisture observed during the period of 1985 - 2007 were analyzed in this study. The results showed that underground water table level was less than 4 m in maize field of Jinzhou, there was a negative correlation between underground water table and soil moisture. Under the same water table,the effect degree of water table on soil moisture increased with the deepening of soil depth. Soil moisture of 0 ~ 30 cm soil depth during the growing season was ranked as： Aug. 〉 July 〉 May 〉 June 〉 Sep. In addition, at annual scale, precipitation during the growing season was significantly negatively related with water table.