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研究结果表明,河南省太行山低山石灰岩区土壤水分有以下特点:持水能力高,田间持水量为24%～34%,居全国中上等水平,一般土壤含水量占田间持水量的53%～73%,处低储量水分状态。土壤水分年内变化规律分为4个时期:凝结累聚期,严重干旱期,水分积聚期,缓慢散失期。通过对测点3年的土壤水分动态过程进行计算分析,建立了灰色系统GM(O,5)模型,得出拟合方程。可以根据气象因子,定量地预测低山石灰岩区一定深度的土壤含水量变化,科学地指导农林业生产。
The results show that the soil moisture in the low-mountain limestone area of Taihang Mountain in Henan Province has the following characteristics: high water holding capacity and 24% -34% water holding capacity in the field, ranking middle and upper middle class in the country. Generally, soil moisture accounts for 53% ~ 73%, at a low state of reserves of water. Soil moisture changes within the year is divided into four periods: the period of condensation and accumulation, severe drought period, water accumulation period, slow loss period. By calculating and analyzing the dynamic process of soil moisture at measuring point for three years, a gray system GM (O, 5) model was established and the fitting equation was obtained. Based on the meteorological factors, we can quantitatively predict the change of soil moisture content in the low mountain limestone area to guide the agricultural and forestry production scientifically.