Seasonal variation of leaching of nitrate under onion cultivation in sandy regosols uncl its predictions by LEACHM-N
Year: 2016
Type: article
Abstract: Seasonll variation of le:rching of nitrate under onion cultiv:rtion in sandy regosols uncl its predictions by LEACHM-R{ R.llawatharauir, M.l.M.Mowjood2, N.l).K.I)ayawansa2 and D.Kumnragtnt*ger t[)cpurlmenl o/ Agriculturul lingitrccring, Fuc'ult1,ol Agricullure, l)u.tlcrn iJniversit.tt,3i':'!!,qniur zDepur!mcnl of'Agriculturul Engitrccring, [;uc'ulty o/'Agriculture, Llniver,sily tl ['eruden!1'u,,\r! l-snku tlinvintnmcnlal Studics I'n44run, Universit), o/'l(ittni1tc1i, A4unitrthu, ('Lutudq An invastiguti.nwu;t c'urriect ,ut v,ith ,,,,o:,:,:::'), ,,r,,u ,ut thc ,cs,trrt*t v*riuti*n rg ttitrrte concenlrulion cluc lo dillarenl .larlilizarurrtl irriguliott ttppliculiott rules.fbrtinit;;i +'uil;t,ulit;tt itt suncly rcgosol.Fiald c.rpcrinartt,\ v,are cotrduc'lad itt Ilullit'ulou, clurin14 Muhrt 2t)$'t und Yala 2005, u,sing lhu 3 nilrogcn rule,\ (0,70 und ll0 kg N/lnt) togelher with 3 irrigulion ruta,s (7, I1 untl 30 ntn),'l\rattt.v,\aven (27) c'.ylitnlric'ul l.ysintalars wara huill in ut lhc c"rparitutniul :;iic,:rnd rc:cl anirtn (Allit!t,r c'alu: r,et.Valhulutt) tvu,t pluultd itt tha l.y:;itneler,r unil irri;tultd usittXg u ntiero sprinklar,\.y\lailtw,ilh u dalivcry rule of'30 nntltr't.Nilruta-N c'ottc'cnlrt:i!ittu itt !lrr !auclwtc v,cre dctcrminad cnlorintatricully hy tha (lutlniutn radtrc:litttt tncthtxl./ /icld,s't'ttla tnitlltauxrlit'u!rxxlal, LEACIIM-N, tvu,t tt:;ed lo,sitttululc lhc c'ottcenlrttliort rt'Nitrule-N itt lltv lt'ri<'!tult, itt !ro!11 ,o;1't"1:;1111,q" Thc Nilrulc-N c'ottcattlrulion durittg Ihlu 2005 sltttvved u c'lcur lrattcl uttti s.,1",',"ilt.^,i;ita:;::.z.ritttuttt permi,r,sihlc linil d'I0 tng/l wltic'lt wara.fittutd to he ltighar llttut lltr: t'ostt"*tlrrtliott:; oh,scrvttl durin.gMulru 2001.l'auk Nitrula-N cottcattlruliott oc'currcd ll-11 du)'.v,fitiiott'ingu./'i:rlilizcr uppliculiott in tlta,fcrlilizacl lrculntanl,\ in Yulu 2005, wltic'h c'ould ha c'otnprrruhlt'rt,ith llu: litttc of' peuk conc'attlrttliort during Muhu 2001 whera thc pauk wus obl;art,cr.l9-13 duyr uf!t:r l'' tolt tlrc,,;:;ing.Stuti,sticul unetl-y,,;is ituliculed lhul LEA('HM-N sinululed tht lvtilt'ulr-kt r:ottt-:t'rtlruliott,s rcu:nnuhly v,all itt Muhu lhan in Yulu.Kcywords: l,tlACl lM-N, loachatc, lysirrre tcr.leachirrg.sautly lcgosols lntrotluction Nitrogcn loss li.orn thc licld arrcl tlrc tlrrcat o1' arrdatlults(Sallcy, l9Q2).'l-hcfirostl$rnili0rpnoblenrgroundwatcr c.rrtar'rira(ior irrcrcasc rrrrclcr associatcd witlr elcvatcrJ lcvcls r:ll'nitrnte is irrigation on sarrcly soils bccausc thc rritratc as a ntctltctttoglobirrcnria' or "b!ttqr hnby syttdrotne".mobilcconr.arrrirrarrtisrlorceasilylcachcdthrouglr Many studics irr sri l'lttlkn liitl'r'' rcpor{ccl liig!r sarrrJy s()ils, cornp()urrdccl witlr cxccss *u,'", tlitritlc cottcctttratiotls ill witlt:l'" which ltil{l lrcett applicatiorrs.ln tdclitiorr to tlris, nitratc lcachirrg atiribtrtcd to itrtcttsivc ttse ol'l"ertilizers tur highly typically occurs wlrcn l'crtilizer application ratci pcrtrtcltblc soils (KtrrrrPpttiti';tultuhi rl ul'.lt)95)' excccd crop nitrogen requireurents (ltoth and lbx, 'l-ltcrclilre att uttclcrstalrdilrg of'tlrc ttteivctltent and 1990;.Jokcla, 1992; Cuilkrd et u:.,1995).'Ihus,traltsl'rort ol' No, atrd elrralrtifying the rninirnizirrg tlrc nitrogorr lbrtilizer losscs liont tlrc ctlttcctttratitltt ol'tlitratt: bc5re11fl lhc root zotte is crop liclds is a grcat oonccnl in view ol'irrcrcasirrg vcry itnpt-lt'tattt to av,,tid thr.' liround rvutcr fertilizeruso cfllcicrrcy artcl reducittg grouttclwater contarnination.contaminatiorr.Mathcuratical rnodel".; anc uscl'ul tools lbi' I'liglrcr levclol'N0.-irrrvatcr is unsal'c lbrrJrinking iltcgrlting tScsc difli:rclt prrl:css,.)sirrv,.riverelirr astheNitrate-Nitrogcn concentratit'rn irr drirrkirrg N transport irr soil alclcair hc rrsq:4 iu loreeastitrg watcrahove Maxintuttt Coutaurinarrt Lcvcl (MCL) llrw a systcrl will lrchavc urit[g1t actually rnakirrg of l0 rng/l causcs scrious lrealth thr.cat tcl infants llcasurepletrts'i1 a ltltvsic:r i systcr' ('l'*ir.ii arrcl
Language: English
Subfield: Environmental Chemistry
Field: Environmental Science
Domain: Physical Sciences
SDG: Zero hunger
Open Access status: bronze
OpenAlex ID: W2585644742