PRLNCIPAL COMPONENT AND RESPONSE CURVE ANALYSES OF SOME MAIZE HYBRIDS TO DIFFERENT NITROGEN FERTILIZATION LEVELS AND PLANT DENSITY
2004; Volume: 55; Issue: 4 Linguagem: Inglês
10.21608/ejarc.2004.233425
ISSN2812-4855
Autores Tópico(s)Crop Yield and Soil Fertility
ResumoPlanting maize ar 24000 plants / fed significantly increased all studied charactcrs except.plarriand €ar heighlthe nunber'ofrows / ear and shellixg %. 24000 plants,'lad rccorded the highest yield treing 24..38 arri I feci-wireteas 300C0 plants / ied g3ve ihe iowest-Increasing nitrogen level up to i20 kgN / fed increased grain yield of maize and irs compone8ts.The highest grain yieid / lid (i2.09 ad / fed) incrcased up ro 135.09 % of unfertilized maiT-e by addjng l20kgNifed.Ear diameter, ear lenlith.th€ nuLnber ofkemels / ro\\', 100 kemei weight, grain yield / plant and gmin yield / {ed were significantly affected by the 1" order inter6ction (plart densiry X niuogen level).Also gain yield per plad and pct fed were affecled by (h] br ids X nifiogen level), u'hereas tfie l"' order inlerao!;on ofhyb.iCsX plant densii) and the 2"' interaction order hybrids, plant density and Biirogen ievel did no1 siglificantly alfbct all studied cha.aclers.The rcsults gene.allysho\, lal grcwing single cross 10 at 24000 plants / led and adding 120 kg N I led ploduced hjgh grain yield.5-The results indicale positive ard hiShly significanl corrclation coefl'lcients bcol€ei1 Srai yield / plant and i1s corponcnts cxccpt lne rumbRr ol rov \ 'cat, b I he pri.r,ril'.11,^nponcnrJndl)ri-srouped he .tud,ec',rial-.1e. in two ma.jor componenls, which alltogether accounted loi 9-a 6 % of the total varlation.The fimt component inclllded ear diametcl, ear lengtir, the number olkemels / ro.ly, 100 -kemel \'!eight, shelling 96 and grain yieid / plan1.'fhe sec.'ndcomponent includ€d plant and etu hc,AirLs dnd r:,e lrmherofrou' ea;.?-Maize grain yield s;liniicaDtly responded to njtrogen ledilizalicn a d thal response was quadratic.Jt gives the highest lalue for coeffi.ientoi delermination (R'), and the lowest "-alii.rol siandard enor (SE) coniparcd \rilh linear (csponse under the three populali{ densities.The optimum nittogen iite ranged lrom 103 kg N / fed 1l) 111 kgN / fed.Graiir yield at the optirnum N dose r?dged trom 25 a.d / led 10 I 1 ard / fed a'id rhc rtooetal; retum renged iiom 2686 to 1285 tE I fed.Eq, words.-cut\e analysis-naize lqbrids, nel ficf,L Pi!1nt dznti!-,prit cipdi coklpone t,.,533i. IN'IRODUCTIC'N _ .The ever increasing pressure ofpopulation has chalienged the Egypiians to ircrease pr.oduc{ion per unit area dueto iionihfion of
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