連作對棉花生長及棉田土壤生物活性的影響.pdf

1、石河子大學碩士學位論文連作對棉花生長及棉田土壤生物活性的影響姓名：張偉申請學位級別：碩士專業(yè)：作物栽培學與耕作學指導教師：劉建國20090601EffectsofLongTermContinuousCroppingoncottonGrowthandonCottonfieldSoilBiologicalActivityAbstractThecoRonisanimportantcropinXinjiangareasincethecultiv

2、atedareaislargeandthecontinuouscroppingtimeislong，thereareaseriesofnegativeinfluences，whichcausedcontinuouscroppingquestionsofcoRonsinXinjiangtobeprominentThisexperimentsimulatescottonslong—termcontinuouscroppingthroughf

3、ixed—pointmicroareaexpedment，theinfluenceofgrowth，theimpoaantphysiologycharacteristicandsoontoshowupthecontinuouscroppinginfluenceonthegrowthofthecottonTheexperimentalsoshowsthattheinfluenceofsoilbiologicalactivitybystud

4、yingmainsoilmicroorganismclassgroup，andshowsthatsoilenzymeactivitychangesindifferentcontinuouscropping，andthecontinuouscroppinginfluenceonthesoilbiologicalactivitybycontrastingthefieldwithactivatedcharcoalprocessingtothe

5、fieldwithoutitaswellasthecoordinatestrawstalkInorderteducethecontinuouscroppingbarrier，theexperimentestablishesthescientificcultivationsystem，whichprovidesthetheorybasistothehighqualityandcontinuouceproductionofXinjiangc

6、ottonThemainresultsaleasfollow：1Thelongtermcontinuouscroppinghastheobviousadverseeffectonthecottonsgrowth，andsomecottonimportantphysiologytargethasbeeninfluencedbythecontinuouscroppingbarrierinthedifferentcontinuouscropp

7、ingageConsequentlytheoutputofcottenshasreduced，therootactivityandthechlorophyllfailedalongwiththecontinuouscropping，WhiletheSODandthePODactivitiesoftherootsandleavesandthecontentofMDAhavethevaryingrisedinthedifferentperi

8、odofdurationtheSODandPODactivitiesandthecontentofMDAwiththeactivatedcharcoaladdinghavethevaryingdegreedropcontrasttothathasnotaddedactivatedcharcoalwhiletherootactivityandthechlorophyllhavethedistinctenhancementBytestthe

9、physiologicaltargetweCallknowthatthecottoncontinuouscroppingsoilcancausestheharmtocotton’sgrowthandtheoutput，butwiththeactivatedcharcoaladdstothesoilitcanreducetheadverseeffectwhichcausedbythecottoncontinuouscropping2Whe

10、nthecontinuouscroppingcottonfieldsoiladdstheactivatedcharcoal，theukaseactivenessinsoilreducingwiththecontinuouscroppingThesoilwithureaseactivitiesthatprocessedbyactivatedcharcoalhastheascensionslightlycomparedtothesoilwi

11、thoutitThegreaseactivitiesoftreatment5C，10Cand15Cinbudingelevates114％72％and03％comparedtothatwithouttheactivatedcharcoal，whichexplainedthatinbudingafteraddingtheactivatedcharcoal，theshort—termcontinuouscroppingcanobviousl

12、yenhancethesoilureaseactivites；afterjoiningtheactivatedcharcoaltheinvertaseactivityinthelongtermcontinuouscroppingimprovesmoreobviouslythantheshorttermcontinuouscroppingWhenthesoiladdstheactivatedcharcoalthecatalaseactiv

13、itesreducesalongwiththecontinuouscroppingageTheinfluenceoftheactivatedcharcoalonthecatalaseactiveislittle，andcan’timprovethethesoilconditionobviously；Thesoilwiththeactivatedcharcoaldosen’tinfluencetheperoxidaseactivitive

14、sobviously3Intheseedlingstagethenumberofthebacteriumreduceswhenthesoiladdstheactivatedcharcoal，andinthelaterbirthperiodbesidesthelong—termcontinuouscroppingthethesoilwiththeactivatedcharcoalenhancesthenumberofthebacteriu

15、minthesoilInthedifferentperiod，thesoilbacteriumnumberofeverytreatmentsreducingafterfirstelevatingInthecotton’sbudingitishighest，andinthebollopeningtimeitisthelowestThefunginumberwiththeactivatedcharcoalinthelaterperiodca