福建铁观音茶园土壤氮素研究

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1、中国生态农业学报2009年3月第17卷第2期ChineseJournalofEco-Agriculture,March2009,17(2):225−229DOI:10.3724/SP.J.1011.2009.00225*福建铁观音茶园土壤氮素状况研究111211**郑丽燕侯玲利陈炎辉郭雅玲卓晶晶王果(1.福建农林大学资源与环境学院福州350002;2.福建农林大学园艺学院福州350002)摘要为了解铁观音茶园土壤氮素供应能力,对福建安溪、永春和华安14个铁观音生产乡镇150个铁观音−1茶园表土及相应茶叶进行了调查。结果表明:供

2、试茶园土壤全氮含量处于中低水平,平均值为0.79g·kg,−1碱解氮含量处于中高水平,平均值为95.56mg·kg,全氮含量与碱解氮含量呈显著正相关。有机质及阳离子交换量与土壤全氮和碱解氮含量均呈极显著正相关。不同土壤类型全氮含量依次为水稻土改种>黄壤>红−1壤>黄红壤>赤红壤,质地黏重的土壤氮含量较高。茶树新梢氮含量变幅为8.1～141.8g·kg,平均值为23.7−1g·kg,与土壤碱解氮含量无显著相关性。土壤碱解氮含量是否能作为茶园土壤供氮能力的指标以及在铁观音茶树的营养诊断时茶树新梢的氮素含量是否能作为茶树缺素的诊断指

3、标有待进一步研究。福建铁观音茶园土壤应注意增施有机肥,避免过度施用速效氮肥。关键词铁观音茶园土壤茶叶氮素福建省中图分类号:S158.3;S571.1文献标识码:A文章编号:1671-3990(2009)02-0225-05SoilnitrogenstatusinTieguanyinteaplantationofFujianProvince111211ZHENGLi-Yan,HOULing-Li,CHENYan-Hui,GUOYa-Ling,ZHUOJing-Jing,WANGGuo(1.CollegeofResourcesan

4、dEnvironmentalSciences,FujianAgricultureandForestryUniversity,Fuzhou350002,China;2.CollegeofHorticulture,FujianAgricultureandForestryUniversity,Fuzhou350002,China)AbstractAninvestigationonthecontentandavailabilityofnitrogeninsurfacesoilandcorrespondingnitrogenconcen

5、trationintealeafwasconductedin14majorTieguanyintea-producingareasinAnxi,YongchunandHua’anCountiesofFujianProvince.TheobjectiveoftheresearchwastodetermineNsupplycapacityofsoilofTieguanyinteaplantationinFujianProvince.Tothatend,150surfacesoilsamplesandcorrespondingtea

6、leaveswerecollectedandanalyzed.TheresultsshowthattotalsoilNismediumtolow−1−1withanaverageof0.79g·kg.Alkali-hydrolysisNismediumtohighwithanaverageof95.56mg·kg.TotalsoilNissignifi-cantlycorrelatedwithalkali-hydrolysisN.OrganicmattercontentandCEChavesignificantcorrelat

7、ionswithbothtotalandal-kali-hydrolysisN.TotalsoilNcontentalsodependsontheparentsoil,anddecreasesinthefollowingorder:paddyricesoil>yellowsoil>redsoil>yellowishredsoil>lateriticredsoil.SoilwithhigherclaycontentcontainshighertotalN.Nconcentrationintealeaf−1−1rangesfrom

8、8.1~141.8g·kg,withanaverageof23.7g·kg.Nosignificantcorrelationexistsbetweentea-leafNandsoilal-kali-hydrolysisN.Theuseofalkali-hydrolysisNa