施用排水污泥制有机营养土对国槐和刺槐种子萌发的影响

施用排水污泥制有机营养土对国槐和刺槐种子萌发的影响

张天昱唐胶彭祚登冯天爽刘春和Summary[目的]探究城市排水污泥制有機营养土对国槐和刺槐播种育苗及林下自然更新的影响，为其在国槐和刺槐林人工培育中的应用提供科学依据。[方法]将污泥制有机营养土产品与苗圃沙土按不同比例混合，加入蒸馏水浸泡不同天数后并制成浸提液，用作种子发芽试验过程中的营养液，在实验室的人工气候箱中进行种子萌发试验。[结果]添加适量污泥浸提液对国槐种子的发芽率、发芽进程、发芽效率和萌发潜力都有促进作用，大多以污泥产品占比20%影响更为显著，污泥用量过多反而会抑制国槐种子的萌发，总体表现为添加少量污泥促进萌发、过量污泥抑制萌发的效果;与国槐种子的结果相似，当污泥产品占比为20%时，刺槐种子的大多数指标都表现为对种子萌发有促进作用，但污泥施入对刺槐的发芽指数有抑制作用。并且浸提时间越长，对国槐和刺槐种子的萌发更加有益。[结论]城市排水污泥制有机营养土适量用作国槐和刺槐播种育苗的基肥和种肥是可取的，但仍需在实际生产中进行完善，充分考虑其合理用量并应用推广。Key排水污泥制有机营养土;种子萌发;国槐;刺槐S792.26

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0517-6611（2022）10-0079-08doi：10.3969/j.issn.0517-6611.2022.10.020EffectsofOrganicNutrientSoilMadefromUrbanSewageSludgeonSeedGerminationofSophorajaponicaandRobiniapseudoacaciaZHANGTian-yu，TANGJiao，PENGZuo-dengetal（TheKeyLaboratoryforSilvicultureandConservationofMinistryofEducation，BeijingForestryUniversity，Beijing100083）Abstract[Objective]InordertoexploretheeffectofusingorganicnutrientsoilmadefromurbansewagesludgeontheseedgerminationofSophorajaponicaandRobiniapseudoacacia，andtoprovidescientificexperimentalbasisfortheapplicationofsludgeproductsintheartificialcultivationofSophorajaponicaandRobiniapseudoacaciaforest.[Method]Theorganicnutrientsoilproductmadefromsludgeismixedwiththenurserysandindifferentproportions，anddistilledwaterisaddedtosoakfordifferentdaystomaketheextract，whichisusedasthenutrientsolutionintheprocessofseedgerminationtest，andtheseedsgerminationtestiscarriedoutintheartificialclimateboxinthelaboratory.[Result]Theresultsshowthattheadditionofanappropriateamountofsludgeextractcanpromotethegerminationrate，germinationprocess，germinationefficiencyandgerminationpotentialofSophorajaponica，andtheeffectismoresignificantwhenthesludgeproductaccountsfor20%.ExcessivedosagewillinhibitthegerminationofSophorajaponica.Generallyspeaking，theeffectofaddingasmallamountofsludgetopromotegerminationandexcessivesludgetoinhibitgermination;similartotheresultsofSophorajaponica，whenthesludgeproductaccountsfor20%，mostoftheindicatorsofRobiniapseudoacaciashowthattheappropriateamountofsludgecanpromotethegerminationofRobiniapseudoacacia，buttheapplicationofsludgecaninhibitthegerminationindexofRobiniapseudoacacia.Andthelongertheextractiontime，themorebeneficialtothegerminationofSophorajaponicaandRobiniapseudoacacia.[Conclusion]AppropriateapplicationofurbansewagesludgetomakeorganicnutrientsoilisadvisableasthebasefertilizerandseedfertilizerforSophorajaponicaandRobiniapseudoacaciasowingandseedling，butitstillneedstobeimprovedinactualproduction，fullyconsideringitsreasonabledosageandapplyingit.KeywordsOrganicnutrientsoilmadefromsewagesludge;Seedgermination;Sophorajaponica;Robin