阜康农田与荒漠土壤含水量时空变化的对比分析

Comparative Analysis of Soil Moisture Characteristics about Farmland and Desert in Fukang

在相同的气象条件下,同一地区的不同区域由于人类活动与土层结构的不同导致土壤含水量往往呈现不同的变化趋势,为了探讨这一现象,运用统计学相关知识对新疆阜康地区农田区与荒漠区2003—2006年土壤含水量的时空变化进行分析。结果表明:农田区与荒漠区的土壤含水量月均值均呈现随深度增加而增加的阶梯状分布,农田区的变化幅度大于荒漠区;根据两者的变异系数,将土层在空间上均可以分为活跃层、相对活跃层和稳定层,农田区的在4、6、7、8这几个月出现高值点。通过对两者土壤含水量变化规律的分析,可为农田灌溉与荒漠改造提供参考指导。

In the same weather conditions, soil moistures show different changing tendency in different regions of the same area, as anthropogenic activities and different soil structures. In order to investigate this phenomenon, by using statistic knowledge, soil moisture characteristics have been researched on farmland and desert in Fukang, Xinjiang province, from 2003 to 2006. The results showed that the monthly mean soil moistures are increased with the increasing depth in a ladder-like distribution. The amplitude of variation is greater in the farmland than the desert. According to the coefficient of variation, both of farmland and desert could be divided into active layer, relatively active layer and stable layer. In farmland, the high points of coefficient variation appear in April, June, July and August. Change rules of soil moisture about farmland and desert are analyzed, which can be provided as reference and guidance for the farm irrigation and reconstruction of the desert.