1、內(nèi)蒙古大學(xué)碩士學(xué)位論文不同磷水平對(duì)黃花苜蓿產(chǎn)量和品質(zhì)的影響姓名：王澤環(huán)申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：草業(yè)科學(xué)指導(dǎo)教師：寶音陶格濤20080601ABSTRACTMedicagofalcataisrichinnutritionandtoleranttodrought，cold，saltandalkali，andhasgoodpalatabilityPhosphorus(P)arenotonlyessentialnutrientsofnormal

2、plantgrowth，butalsoimportantcomponentsinalfalfaforagequalityevaluationTheresearchonMedicagofalcataatpresentfocusinrhododendrons，Autotoxicitygeneticsandbreeding，andtheresearchabouttheeffectofNitrogen(№，Phosphorus(P)andPot

3、assium(K)onalfalfa’SyieldandqualityfocusinMedicagosativaAimedatthiscircs，ImakearesearchabouttheeffectonalfalfayieldandforagequalityofMedicagofalcate，IhopemyresearchwillaffordaguidancetofarmerThestudyisapotexperiments，put

4、thePhosphoruselementinpotbyoneoffatseedlingTheexperimentslasttwoyears，theplantaledippedthreetimes，onetimeinyearone，twotimesinthenextyearTherearesomephenomenahappenedonalfalfawithapplicationdifferentlevelsofphosphorusifth

5、erewasenoughKandNI1hehj曲estplantheighthappenedontheseconddippingPlantheightperformancesameastheperformanceofthebiomassTherealeasignificantpositivecorrelationbetweenPlantheightandbiomassIIPreviousstudiesshowedphosphorusel

6、ementscanreducestalk／leafratioOnthecontrarymyresearchshoweddifferentresultsThetreatmenthavethehighBiomasssameashavehigllstalk／leafratioThelasttimehavethelowestbiomassⅢPhosphorusdementwillsignificantlyreducedroot／shootrat

7、ioIVThehighestyieldhappenedontheproperusetreatments；Comparedinthreedipped，thesecondeliphavethehighestyield，thelasthavethelowestyield，andthefirstclipbeplacedinthemiddleTherearedifferentphenomenabyone—offPhosphoruselementi

8、ntwoyearsForexample，thetreatmentofthehighestPhosphorusfertilizer120kg／hm2ithasthelowestyieldintheyearone，butthenextyearithastheplacednextnumberone，andthelasttimesitisthenumberOneVThehi曲estunderbiomasshappenedontheproperu