黑龙港地区土壤含水量的垂向分布研究

Research on Vertical Distribution of Soil Moisture in Heilonggang District

黑龙港地区是河北省为落实＂2020年我国新增粮食500亿kg＂的规划而划定的粮食主产区之一,土壤水的开发利用是未来粮食增产的重要措施。为探讨黑龙港地区土壤含水量垂向分布情况,以河北省农林科学院旱作农业研究所衡水试验站土壤为观测点,分别利用FDR、TDR、烘干法测量了不同深度的土壤含水量。结果表明在0-110cm深度上土壤含水量整体上呈现先增加后减少再增加的趋势,这种趋势主要是由于不同土层的不同性质所决定的,而土壤垂向剖面存在的两个潴育层是土壤水分含量呈现这种变化趋势的主要原因。

Heilonggang is one of the areas for the planning of ＂new 100 billion kilograms of grain by 2020s＂.The development and utilization of soil water is an important measure.For exploring the vertical distribution of soil water in depth,the experiment stations of Agriculture and Forestry Institute in Hengshui city is set as an observation station,the frequent domain reflectometer,the time domain reflectometer,the drying method are all used for measuring the different soil water in different depth.The results show that soil moisture content increases first and then decreases from 0-110 depth.The tendency is mainly due to the different character in different soil layers.The existing two waterloggogenic horizons is the main reason for this trend.