中文摘要：

为分析辽西北地区玉米耗水时间变化趋势和耗水特征,利用辽西北地区1986-2007年的降水、气温和土壤含水量数据,基于水量平衡方程,采用Kriging插值法、Z指数法及多元回归分析等方法,对辽西北地区玉米耗水特征及耗水量与降水和气温的关系进行分析。结果表明：在辽西北地区干暖化趋势的背景下,1986-2007年玉米耗水量总体呈下降趋势；玉米耗水量等值线梯度较小,空间分布较均匀；玉米在不同旱涝等级下的耗水特征与降水量呈极显著相关关系,不同旱涝等级下耗水量从大到小排序为大涝、偏涝、正常、偏旱、大旱；降水和气温的变化对作物耗水量均有影响,其中积温对作物耗水量的影响较小,而降水量与耗水量呈明显正相关关系。

英文摘要：

The temporal changing trends of water consumption of corn and its water consumption characteristics in northwestern Liaoning are investigated in this study. Based on the water balance equation, the Kriging interpolation method, Z-index and multivariate regression analysis have been employed in analyzing the water consumption characteristics of corn in northwestern Liaoning and its relationship with precipitation and temperature. Analyses are performed on precipitation, temperature and soil moisture content datasets in northwestern Liaoning from 1986 to 2007. The results show that water consumption of corn is decreasing as a whole under the background of dry warming in northwestern Liaoning. The contour gradient of water consumption of corn is small, and its spatial distribution is more homogeneous. There is a significant correlation between water consumption characteristics of corn and precipitation at different drought and flood levels. The descending order of water consumption of corn at different drought and flood levels is： floods, partial waterlogging, normal, partial drought, drought. The changes in precipitation and temperature have an effect on crop water consumption, while the effect of change of temperature is relatively small. The results also show that there is a significantly positive correlation between precipitation and water consumption.