论文部分内容阅读
土壤水分是农业生产和区域生态系统的重要影响因子。以黑龙江省鹤山农场2号小流域为研究区域,系统研究不同土地利用方式土壤水分的动态变化过程和剖面变化特征。结果发现:不同土地利用方式土壤含水量随观察期内降雨量时间分布波动,并且总体呈降低趋势,但各变化曲线有所差异。观测时段内土壤水分变化分为相对稳定期、消耗期和补给期;土地利用方式对土壤剖面含水量的影响随土层的加深而增大,各土地利用方式的土壤含水量随土层的加深也呈现出不同的变化趋势,并且其土壤剖面含水量变化均存在季节差异。
Soil moisture is an important factor affecting agricultural production and regional ecosystems. Taking the small watershed No.2 of Heshan Farm in Heilongjiang Province as the research area, the dynamic changes of soil moisture and the characteristics of profile changes were systematically studied. The results showed that: the soil moisture content of different land use patterns fluctuated with the distribution of rainfall during the observation period, and generally showed a downward trend, but the curves varied. The changes of soil moisture during the observation period were divided into relatively stable period, consumption period and recharge period. The effect of land use on soil profile moisture content increased with the deepening of soil depth. The soil moisture content of each land use pattern was deepened with the soil depth Also showed different trends, and there are seasonal variations in the moisture content of soil profiles.