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时间:2020-06-06
《片麻岩新成土中氮素淋溶迁移的模拟研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、第27卷第1期水土保持学报Vo1.27No.12013年2月JournalofSoilandWaterConservationFeb.,2013片麻岩新成土中氮素淋溶迁移的模拟研究赵斌,王红,周大迈,张爱军。,张瑞芳(1.河北农业大学,河北省生物无机化学实验室,河北保定071001;2.河北农业大学山区研究所/国家北方山区农业工程技术研究中心,河北保定071001)摘要:采用室内土柱模拟的方法,研究片麻岩新成土中不同肥料、不同施氮量对氮素垂直运移的影响。结果表明,随着施氮量增加,硝态氮和铵态氮淋
2、溶浓度增大,氮素淋失量增多。中等施氮量下施用有机无机混合肥可以减少氮素淋失。尿素、有机无机混合肥、氮磷复合肥中硝态氮淋失总量比值为671:583:629。尿素硝态氮淋失率平均为29.0,氮磷复合肥硝态氮淋失率平均为27.8,有机无机混合肥硝态氮淋失率平均为23.7。随着土层深度的增加,60cm处和90cm处硝态氮淋失量差异不显著,两处硝态氮淋失量比值为1:1.03,铵态氮的淋失量增加显著,两处铵态氮淋失量比值为1:2.4。在片麻岩新成土壤地区,土壤培肥应本着少量多次原则。关键词:片麻岩;硝态氮;
3、淋溶迁移中图分类号:S153.5文献标识码:A文章编号:1009—2242(2013)01-O017一O5SimulationStudiesonNitrogenTransportandLeachingintheGneissEntisolsZHAOBin,WANGHong,ZHOUDa—mai。,ZHANGAi—jun。,ZHANGRui—fang(1.KeyLaboratoryofBio—inorganicChemistry,AgriculturalUniversityofHebei,Baodi
4、ng,Hebei071001;2.MountainousAreasResearchInstituteofAgriculturalUniversityofHebei/AgriculturalEngineeringTechnologyResearchCenterofMountainDistrictintheNorthofChina,Baoding,Hebei071001)Abstract:Bysimulatingsoilcolumninlaboratory,theeffectsofthenitrat
5、everticaltransportcharacteristicsinthegneissunderthedifferentofNfertilizerwerestudied.Theresultsshowedthat,theamountofnitrogenleachedwasincreasedwiththeincreasingamountofnitrogenfertilizer.Organic—inorganicmixedfertilizercouldreducenitrate—nitrogen1e
6、achedwiththemediumnitrogenfertilizerapplication.TheratioofleachinglOSSamoUntsofnitrate—nitrogenwas671:583:629amongUrea。organic—inorganicmixedfertilizerandN—Pcompoundfertilizer.Tourea,therateofnitrate-nitrogenleachinglOSSaveraged29.0.N—Pcompoundfertil
7、izeraveraged27.8.Organic—inorganicmixedfertilizeraveraged23.7.Withtheincreaseofsoildepth,therewasnosignificantdifferencebetween60cmand90cmwheretheratioofnitrate—nitrogenleachinglosswas1:1.03.Theratioofammonium—nitrogenleaching1OSSwas1:2.4whichincreas
8、edsignificantlybetweentWOdepths.Authorsgaveadvicetofertilizeafewforeachtimebutformanytimesinthegneissentisols.Keywords:gneiss;nitrate;transportandleaching河北省太行山地区大约拥有11817万hm片麻岩,占全国片麻岩总面积的3.7,随着人们不断开垦开发,截止2004年片麻岩开发面积已达到36万hm。新形成的片麻岩土为粗骨土_】],土壤颗粒较大,土
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