%0 Journal Article
%T Characteristics of N and P Loss in the Soil of Purple Sloping Farmland at Different Fertilization Levels
%A HEBing-hui
%A HUANGWei
%A GUOTian
%A CAORu
%A CHENYun
%J 重庆师范大学学报(自然科学版)
%P 134-141
%D 2012
%R 10.11721/cqnuj20120325
%X Usingthe"WinterWheat-SummerMaize"modelandtheplotrunoffmonitoringmethod,westudiedthecharacteristicsofnitrogenandphosphoruslossinthesoilsedimentofpurpleslopingfarmlandunderfiveconditions,includingcontrol,combinedmanure/fertilizerapplication,chemicalfertilizer,highintensitychemicalfertilizer,andcrossridgefarming.Theresultsshowedthatthenutrientcontentofthesurfacesoilincreased,tosomeextent.Furthermore,thenutrientswereenrichedinthesedimentforallgroups.Thedegreeofsedimentnutrientenrichmentofcrossridgefarmingwaslessgreatcomparedtolongitudinalfarming.Forthecombinedmanure/fertilizerapplication,theratioofeffectivenutrientswaslargerthanthatoftotalnutrients;whereas,forthechemicalfertilizergroup,theratioofeffectivenutrientswassignificantlysmaller.Atallfertilizationlevels,sedimentlossonlyaccountedfor0.34%~6.21%.78.80%~84.83%ofthetotalphosphoruslossoccurredinthesediment,andthephosphoruslosswaslargelyinthesediment.Therelativelossfactorofnitrogenwasthelargestforthechemicalfertilizergroup,followedbythecrossridgefarminggroup,thehighintensitychemicalfertilizergroup,andthecombinedmanure/fertilizerapplicationgroup.Therelativelossfactorofphosphoruswasthelargestforthehighintensitychemicalfertilizergroup,followedbythecrossridgefarminggroup,thechemicalfertilizergroup,andthecombinedmanure/fertilizerapplicationgroup.
%K purplesoil
%K slopingfarmland
%K fertilizationlevel
%K rainfall
%K sediment
%K NandPloss
%U http://cqnuj.cqnu.edu.cn/oa/DArticle.aspx?type=view&id=120325