%0 Journal Article %T 陕西省农田土壤紧实度空间变异及其影响因素<br>Spatial Variability and Influence Factors of Cropland Soil Compaction in Shaanxi Province %A 石 %A 磊 %A 王娟铃 %A 许明祥 %A 刘 %A 京 %J 西北农业学报 %D 2016 %R 10.7606/j.issn.1004-1389.2016.05.018 %X 为探明陕西省农田土壤紧实度现状及区域差异，2013年在全省选取228个调查点，对1 100多块地的农田土壤紧实度进行调查。结果表明：陕西省农田耕层土壤紧实度为250.0~2 080.0 kPa，平均为781.3 kPa，变异性中等；全省各区犁底层紧实度为716.0~5 650.0 kPa，平均为2 900.5 kPa，中等变异。耕层土壤紧实度以关中东部和陕南东部较大，1 000 kPa以上，陕北大部分县区耕层比较疏松；犁底层紧实度以关中地区及陕南东部较大，在3 000 kPa以上，陕北地区犁底层紧实度普遍较低。耕层土壤紧实度主要受区域位置、农田利用类型、地形、作物类型、耕作方式及土壤类型影响（P<0.05）；犁底层紧实度受区域位置、作物类型、地形、耕作方式、熟制、机耕年限、灌溉情况、土壤类型以及土壤含水量等因素影响（P<0.05）。<br>In order to explore the current condition of cropland soil compaction in different regions in Shaanxi province,a soil compaction survey was conducted in 1 100 patches in 228 points throughout the whole province in 2013.The results showed that the average compaction of plow P layer in cropland in Shaanxi province was 781.3 kPa,ranging from 250.0 kPa to 2 080.0 kPa with a moderate variability; the average compaction of plow pan was 290.5 kPa,ranging from 716.0 kPa to 5 650.0 kPa with a moderate variability.The plow P layer compaction of eastern Guanzhong area and eastern Shannan area was larger compared with other regions,with a value more than 1 000 kPa.Most part of northern Shaanxi area had a relatively looser plow player.Plow pan compaction in Guanzhong area and eastern Shannan area were comparatively larger with a value of 3 000 kPa or more. Plow pan compaction of northern Shaanxi area was generally lower.Plow player compaction was influenced mainly by regional location,plots situation,terrain,crop types,tillage methods and soil types (P<0.05);and plow pan compaction was influenced by regional location,crop types,topography,tillage methods,cropping system,mechanical tillage years,irrigation conditions,soil types and soil moisture (P<0.05). %K 农田土壤 紧实度 空间变异 影响因素< %K br> %K Cropland soil Compaction Spatial variability Influence factors %U http://xbnyxb.alljournals.cn/ch/reader/view_abstract.aspx?file_no=20160518&flag=1