不同施肥处理对纽荷尔和红肉脐橙果实糖积累的影响-(7431)

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1、华中农业大学2013届硕士研究生学位论文综上所述，推荐施肥量为N0．8kg／株，磷肥P2050．40kg／株，钾肥为K20为O．50kg／株，同时配施0．25k∥株MgS04、40∥株ZnS04·7H20、60g／株EDDHA—Fe螯合铁。关键词：脐橙；果实产量；可溶性固形物；糖积累；转化酶；蔗糖合成酶；蔗糖磷酸合成酶不同施肥处理对纽荷尔和红肉脐橙果实糖积累的影响ABSTRACTFieldtrialswithtwonavelorangecultivars，‘Newhall’and‘Caracal'a’，wereconductedintwoconsecutiveyears．

2、Thepaperstudiedtheeffectofdifferentfertilizationtreatmentsonfruityieldandtotalsolublesolid，accumulationofsugarsofthefruitandmetabolism，SOastoprovidereferenceforfertilization．Themainresultsare嬲follows：(1)Nitrogen,phosphateandpotassiumfertilizersapplicationincreasedfruitweight,fruityieldand

3、fruitqualityofNewhallandCaracaranavelorange，therearedifferencesbetweenannual．Withtheincreaseofphosphorusandpotassiumfertilizerrate，thefruityieldofNewhallandCarataranavelorangeincreased，thefertilizerrateswereN：0．80kg／hill，P205：0．40kg／hill，K20：O．50kg／hillwhenthef“tityieldofNewhallandCaracar

4、dnavelorangewerethehighest．Inaddition，applyingdifferentmicronutrientsandmesonutrientsfertilizersCanalsoincreasedthefruityield．Nitrogen,phosphate，andpotassiumfertilizerapplicationcanincreasethecontentoftotalsolublesolidinfruit．Accordingtheresultsoffertilizereffects，theoptimumfertilizerrate

5、swereN：0．80kg／hill，P205：O．40kg／hill，K20：0．50kg／hill，inNewhallandCaracardorchards．WiththeapplicationofthePKtreatment，applyingmicronutrientsandmesonutrientsfertilizerscanincreasethesolublesolidanddecreasedtitratableacidinfruit．ThefruitqualityinthetotaJofMgFeandZntreatmentWasthebestinthediff

6、erentmicronutrientsandmesonutrientsfertilizerstreatments．(2)NPKandmicronutrientsfertilizersappHcafionincreasedfructose，glucoseandsucrosecontentinfruit．Withtheincreaseofphosphorusandpotassiumfertilizerrate，thesugarcontentincreased，buthighphosphorusandpotassiumlimittedthesugarinthefruitcont

7、inuestorise．Accordingtheresultsofsugarcontent,theoptimumfertilizerrateswereN：0．80kgghill，P20s：0．40-4)．60kg／hill，K20：0．50--0．75k∥hill．Fordifferentmicronutrientsandmesonutrientsfertilizerstreatments，theamountofsugarinthefruitwasintheorderofthetotalofMgFeandZn>Mg>Zn，Fe