摘要
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 soil water of Tai Hang mountain's low limestone area has the
following characteristics:The water holding capacity is from 24 to 34 perce-
nt,which is the middle and higher level.The soil water storage is generally
from 53 to 73 percent of the field capacity and keeqs lower regime.The cha-
nge rule of the soil water in a year is divided into 4 periops:the coagu-
lating and accumulating period,the serous dry qeriod,the accumulating
period and the slowly losing period.The model of the grey system GM
(0,5)and its fitting equations are based on a 3 years investigation of the
dynamic soil processes.The results could be used to quantitatively forecast the
change of the soil water of certain depth according to the meteorological fa-
ctor and direct the production of agricult ure and forestry.
出处
《河南农业大学学报》
CAS
CSCD
1992年第1期70-77,共8页
Journal of Henan Agricultural University
基金
国家"七五"重点攻关项目
关键词
太行山
石灰岩
土壤
含水率
Tai Hang mountain
low limestone
water holding capacity
field capacity
meteorological factor
grey system
