連作對(duì)棉花生長(zhǎng)及棉田土壤生物活性的影響.pdf

1、石河子大學(xué)碩士學(xué)位論文連作對(duì)棉花生長(zhǎng)及棉田土壤生物活性的影響姓名：張偉申請(qǐng)學(xué)位級(jí)別：碩士專(zhuān)業(yè)：作物栽培學(xué)與耕作學(xué)指導(dǎo)教師：劉建國(guó)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