论文部分内容阅读
利用甘肃河东地区代表站玉米地土壤含水量、地温、降水资料,运用统计模拟方法,分析了土壤贮水量、温度的变化特征及水热耦合效应。结果表明,甘肃河东地区玉米地100cm土层的贮水年变化呈抛物线状,6月上旬至中旬土壤贮水量达到最低值。地温自20世纪70年代以来呈上升趋势,其中冬季上升幅度最为明显。水热交互作用与土壤含水量的变化有显著相关关系。一年内玉米地土壤温湿变化特征表明,土壤贮水量主要有2个低值阶段:5～6月及7～8月,不同时间温湿匹配对玉米生长造成不同影响。
Based on the data of soil moisture, ground temperature and precipitation in the maize field at the representative stations in eastern Hedong region of Gansu, the characteristics of water storage and temperature and the coupling effect of water and heat were analyzed by using statistical simulation method. The results showed that the change of water storage in 100 cm soil layer of corn field in the east of Gansu Province was parabolic, and the soil water storage capacity reached the lowest in the first ten days of June. Geothermal temperature has been on the rise since the 1970s, with the most obvious increase being in winter. The hydrothermal interaction has a significant correlation with the change of soil water content. The characteristics of soil temperature and humidity in one year showed that the soil water storage mainly had two low-value stages: May-June and July-August, with different effects of temperature and moisture matching on the growth of maize.