上海城郊低吸力段土壤持水供水特性的研究  

Soil Water Holding Capacity and Soil Water Supplying Capacity in Low Suction Condition of Different Land Use Patterns in the Suburb of Shanghai

作　　者：卢小遮[1] 柳云龙[1,2] 施振香[1] 章立佳[1] 庄腾飞[1] 

机构地区：[1]上海师范大学地理系,上海200234 [2]上海师范大学城市生态与环境研究中心,上海200234

出　　处：《水土保持学报》2010年第6期231-235,245,共6页Journal of Soil and Water Conservation

基　　金：上海师范大学重点培育学科项目(DZL801);上海师范大学校级资助项目(SK200729);上海市教育委员会科研创新项目(编号:09YZ175);上海市教委重点学科建设项目(编号:J50402);闵行区自然科学研究项目(2009MHZ014)

摘　　要：选择上海城郊地带,对不同农业用地类型和不同城市功能区土壤持水供水特征及其影响因素进行了分析,结果表明,由于土壤粉粒和沙粒含量较高,土壤持水供水能力弱。不同农业利用方式下土壤持水能力差异较小,土壤持水特征的变化主要集中在低吸力段(0～30 kPa),反映了土壤通气状况的改变。与农业土壤相比,受人为干扰强烈的城市不同功能区土壤持水能力差异明显。低吸力段土壤总孔隙度、毛管孔隙度、有机质含量与各吸力段土壤含水量之间存在显著相关关系,影响土壤持水性的主要因素是容重、土壤孔隙组成和有机质含量。土壤压实和有机质含量增加是影响城市土壤水分性质的重要因素。幂函数模型能较好地模拟土壤含水量与土壤吸力之间的关系。Agricultural and urban soil water holding and supplying capacity in low suction condition with different soil utilizations in Shanghai suburban areas were analyzed.The results showed that due to high soil silt sand and sand content,the soil water holding capacity and soil water supplying capacity in low suction condition were lower.There was no marked difference in soil water holding capacity with different agricultural utilization patterns,the marked difference of soil water holding capacity mainly in low soil suction（0～30 kPa） was representative of soil aeration status changes.Compared with agricultural soils,soil water holding capacity in different urban function areas had marked differences due to strongly human disturbance.Soil total porosity,soil capillary porosity,soil organic matter content were significantly related to soil water content at respective soil suction.Soil bulk density,the composition of the soil porosity and soil organic matter content were main factors affecting soil water holding capacity.Soil compaction and soil organic matter content increase are important factors affecting urban soil water characteristics.The power function could well simulate the relationship of soil moisture and soil suction.

关 键 词：农业土壤 城市土壤 土地利用方式 土壤持水特性 土壤供水特性 

分 类 号：S152.7[农业科学—土壤学]