不同水熱條件下菜籽餅有機氮在煙田土壤中礦化特征研究.pdf

1、西南農(nóng)業(yè)大學(xué)碩士學(xué)位論文不同水熱條件下菜籽餅有機氮在煙田土壤中礦化特征研究姓名：羅春燕申請學(xué)位級別：碩士專業(yè)：水土保持與荒漠化防治指導(dǎo)教師：盧玉東龍懷玉20050601AbstractTheuseofrapeseedcakeasaSOUCeofnutrientsiswidespreadamongthetobaccoplantingsoilBenefictsofrapeseedcakeontheyieldandqualityoffluec

2、uredtobaccodependontheNteleasepattemsanduptakebythe丑BecuredtobaccoThisstudyWasconducttoestimateNmineralizationinsoftsamendedwithrapeseedcakeSoftmonistureadjustedto50％，70％，90％fieldcapacitywatercontentandamendedrespectivel

3、ywithrapeseedcake，fermentedrapeseedcakewith2kindofleaveningagentwereineubatedatl5℃，25℃，35℃for56daysunderthesimulatedindoorexperimentAnonamendedcontrolwasalsoincludedAt7、14、21、28、35、45、56dafterthestartofdecomposition，soft

4、N03“andsoilNH4weremeasuredTherelationbetweenNmineralization，losefromsoil，rapeseedcakeandtemperature，moistureandtheeffectoffermentontheNmineralizationofrapeseedcakewasdiscussedItwillprovidescientificbasisofapplyingrapesee

5、dcakeandNfertilizertotobaccoplantingsoftsTheresultsobtainedwereasfollows：TemperatureandmoisturehaveeffectonNmineralizationofthetobaccoplantingsoftThehigherthetemperature，thehigherthecontentofNH4，N03“NⅢandthemeanofnitrifi

6、cationrate014d，thecontentofNH4，N03NmmincreasedwiththesoilwatercontentInthe1aterperiodofincubation，moisturehaslittleeffectontheseTemperatureaffectedontheNmineralizationofrapeseedcakeIntheearlydays，contentandtherateofNmine

7、ralizationofrapeseedcakeincreasedwithincreasingtemperature；Butinthelaterperiodofincubation，inorganicNcontentdecreasedwithincreasingtemperatureunderallthecontrolbecausetheloseofinorganicincreasedwithincreasingtemperatureM

8、oistureaffectedontheNmineralizationofsoftandrapeseedcakeIntheearlydays，inorganicNcontentandtherateofNmineralizationincreasedwithincreasingsoftwatercontent，ButinthelaterperiodofincubationinorganicNcontentdecreasedwithincr

9、easingsoilmoistureunderauthecontrolbecausetheloseofinorganicincreasedwithincreasingsoilmoistureThehigherthemoistureofthesoil，theearlierthelargestvalueoftheinorganicNcontentshowedupFermentingaffectedontheNmineralizationof

10、rapeseedcake014dthecontentofinorganicinsoilwithunfermentedrapeseedcakeislowerthanothertwofermentedrapeseedcake，butthetwolatercontrolhavelittledifferenceInthelaterperiodofincubation，theinorganiccontentofthefirstcontrolish

11、igherthanthetwolatercontr01IfIallcontrolwithrapeseedcake014dinorganicNcontentrapidascent；1445d，itincreasedordecreasedgradully；itdecreasedduring4556dItindicatedthattherapeseedcakereleasedNmanilyinthe45daysanditmootwithupt