农田土壤紧实度和容重空间变异性研究  

Spatial Variability of Soil Compaction and Bulk Density in Farmland

作　　者：王金贵[1] 王益权[1] 徐海[1] 冯小龙 李建波[1] 王永健[1] 夏发生[1] 

机构地区：[1]西北农林科技大学资源环境学院,陕西杨陵712100 [2]陕西省土地整理中心,陕西西安710054

出　　处：《土壤通报》2012年第3期594-598,共5页Chinese Journal of Soil Science

基　　金：陕西省农业科技推广项目"关中灌区小麦玉米高产技术"(14220210)资助

摘　　要：为了揭示长期人为管理与利用过程对于土壤质量的作用与影响,本试验研究了陕西关中地区旱地农田土壤紧实度和容重空间变异特征。研究结果表明:在水平方向上土壤紧实度和容重具有中等变异强度,土壤紧实度和容重以村庄为中心向外逐渐增大;在垂直方向上土壤紧实度和容重同样存在明显的变异性。进一步分析表明,土壤紧实化的水平空间变异特征是人为长期采用就近原则进行有机培肥,对土壤质量产生的作用与影响;而垂直剖面上的差异性则是多年旋耕产生的结果。所以,加强土壤培肥,改善现行耕作制度显得极为重要。In order to reveal the effects of the long-term human management on soil quality,this research studied the spatial variability of soil compaction and bulk density of Guanzhong arid farmland in Shaanxi.The results showed that soil bulk density and soil compaction had a moderate variation and increased gradually as the distance increasing outward from the village in the horizontal direction.Soil compaction and bulk density had same changeability in the vertical direction.The further analysis indicated that the variability characteristics of soil compaction in horizon direction were caused by long-term artificial use of organic fertilization with nearby principle which has the function and influence to the soil quality.But in the vertical direction the variability was caused by the long term rotary tillage method.So,it is great imperative to increase soil fertility and improve the present tillage method.

关 键 词：塿土 容重 紧实度 空间变异 

分 类 号：S12[农业科学—农业基础科学]