京郊日光溫室土壤環(huán)境特征與黃瓜優(yōu)質高產相關性的研究.pdf

1、中國農業(yè)大學博士學位論文京郊日光溫室土壤環(huán)境特征與黃瓜優(yōu)質高產相關性的研究姓名：王柳申請學位級別：博士專業(yè)：農業(yè)生物環(huán)境與能源工程指導教師：張福墁20030601AbstractThecharacteristicsofsoilandfertilizationoffruitvegetableinsolargreenhouseinBeUingwereinvestigatedBasedonit，theinfluenceoffertilizat

2、iononcucumbers’qualityandyieldwasresearchedTheresultsindicatedthatmostofthesolargreenhousesinBeijingnowwerebuiltedinrecentyears，soilpHrangedfromlitmuslesstoalkalescent，thesoilbulkdensitywasonthehighside，andsoilpHofmoreth

3、an70％greenhousesinvestigatedwassuitableforcucumbercultivationTheECin020cmsoildepthwashigherthan2040cmdepthItwasshowedthatsalinityaccumulatedinsoilsurfaceofgreenhousestestedthesalinitywastoohighforcultivatingcucumberinabo

4、ut158％greenhousesThesoilorganicmatteravailableN，P’Kwereallatamiddleorlowlevelofsoilfertilitywhereas，allavailablemicronu翻ents，CXCE：ptboron，wereathighlevelThesoilnutrientscontentinsolargreenhouseincreasedwiththenumberofcul

5、tivationyearsSoilorganicmaaertotalnitrogen，availablephospho／ldsandzincweresignificantlyrelatedtothenumberofgreenhousecultivationyearscorrelationswere0675(P001)，O690(P001)O523(Po05)andO528口005)，respectivelyThebulkdensityo

6、fgreenhousesoilwerenegativelyrelatedtothenumberofgreenhousecultivationyears(r=一0509，PO05)Afterfruitvegetableswerecultivatedforaseason，thesoilnutrientscontentinsolargreenhouse，exceptboron，increased，butsoilsalinityproblemi

7、ncreasedbymorethan50％ThesoilN03’—Nwastheprimaryreasonforthesoilsalinityproblem，anditsignificantlyrelatedtosoilECaswelITheorganicmanurefertilizationrateofgreenhousefruitvegetablewasexcessiveingreenhousesinvestigatedTheave

8、ragequantitiesoforganicN，PandKappliedongreenhousefruitvegetableswere23730kg／hm2，20409k臺qara2and14949kg／hm2，Itwasaproblemthatthesortoforganicmanurewasnotdiversitychickenmanureaccountformorethan70％oftheorganicmanureThechem

9、icalfertilizationrateofgreenhousefruitvegetablewasdifferentindifferentgreenhouse，someofthemwastoomuchforvegetabletouptakeandtheotherwaszeroTheratioofchemicalN，PandKappliedongreenhousefruitvegetableswas1：O63：076anditwasre

10、lativelyreasonableforfruitvegetabletouptakeTheagronomicefficiencyofchemicalN，PandKwas242％，143％and491％，respectivelyTherewereaIotoffertilizerswereleftoversoi|Withtheincreaseoffertilizerapplicationratethenutrientqualityandf

11、lavorqualityaswellasmarketqualityofcucumberincreasedButcucumberyield，qualitycharacteristics，includingcrispnessandmarketratioofcucumber，andmorphologicalandphysiologicalcharacteristicsincludingcucumbers’developmentheight，l

12、eavesareanetphotosyntheticrate，leavesandstems’dryandfreshweight，roots’volumeandabsorbencNdecreasedbyexcessivefertilizerapplicationongreenhousecucumber，whereasN03]NconcentrationincreasedInpoorlightandlowtemperatureseason，