资源描述：
《华南赤红壤无机复合肥氮磷淋失特征》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、华南赤红壤无机复合肥氮磷淋失特征应用生态2007年5月第18卷第5期ChineseJournalofAppliedEcology.May2007,18(5):1015—1020华南赤红壤无机复合肥氮磷淋失特征术曾曙才吴启堂(华南农业大学林学院,广州510642;华南农业大学资源环境学院,广州510642)1引言摘要采用室内土柱淋溶模拟试验,研究了不同施肥水平下无机复合肥中氮和磷在华南赤红壤中的淋失特征.结果表明:铵态氮,硝态氮和总氮淋失量均随施肥量增加而提高;肥料中氮的淋失率在36.8%～49.2%之间,总氮淋失量(Y)与施肥量()之间的回归方程为Y=0.3667x+66
2、.483(R=0.992);铵态氮和总氮的淋失主要集中在前5次淋洗,硝态氮的淋失持续时间更长.施肥量对可溶性磷淋失量无显着影响,但颗粒磷和总磷淋失量均随施肥量增加呈上升趋势;肥料磷淋失率在0.002%～0.010%之间,总磷淋失量(y)与施肥量()之间的回归方程为Y=7e～+0.0538(R=0.931);磷的淋失动态与氮显着不同,为缓慢的持续累积过程.硝态氮与铵态氮淋失量比值和可溶性磷与颗粒磷淋失量比值均随施肥量增加呈下降趋势.关键词无机复合肥赤红壤氮磷淋失文章编号1001—9332(2007)05—1015—06中图分类号S151.93文献标识码ALeachingch
3、aracteristicsofnitrogenandphosphorusininorganiccompoundfertilizerfromlatosolicredsoilinSouthChina.ZENGShu—cai,wuQi—tang(CollegeofForestry,SouthChi—naAgriculturalUniversity,Guangzhou510642,China;CollegeofNaturalResourcesandEnviron—ment,SouthChinaAgriculturalUnive~ity,Guangzhou510642,China)
4、.一Chin.App1.Eco1.,2007,18(5):1015—1020.Abstract:Asoilcolumnexperimentwasconductedtoinvestigatethelcachingcharacteristicsofni—trogenandphosphorusininorganiccompoundfertilizerfromlatosolicredsoilinSouthChina.Theresultsrevealedthattheleachinglossofsoiltotalnitrogen(TN),NH4一NandNO3-Nwasin—cre
5、asedwithincreasingapplicationrateofinorganiccompoundfertilizer.and36.8%--49.2%offer—tilizernitrogenwaslostwithleachingwater.TheregressionequationofTNloss(y)andNapplica?tionrate()wasY=0.3667x+66.483(R:0.992).TNandNH一Nlossesmainlyoccurredinthefirst5leachingevents,whileNO1一一Nlosscontinuedtob
6、esignificanttillthe9thleachinge—vent.Fertilizationratehadnoobviousimpactonsoildissolvedphosphorus(DP),buttheleachinglossoftotalphosphorus(TP)andparticulatephosphorus(PP)wasincreasedwithincreasingferti—lizationrate.Thefertilizerphosphoruslosswaswithintherangeof0.oo2%一0.01%.andthere—gressio
7、nequationofTPloss(Y)andPapplicationrate()wasY=7e一+0.0538(R=O.931).QuitedifferentfromthatofN.thelcachinglossofPwasaslowandcontinuousprocess.BoththeleachinglossofNO3一一N/NH4一NandofDP/PPwasdecreasedwithincreasingfertiliza—tionrateKeywords:inorganiccompoundfertilizer;lat
