施用排水污泥制有機(jī)營養(yǎng)土對(duì)國槐和刺槐種子萌發(fā)的影響

施用排水污泥制有機(jī)營養(yǎng)土對(duì)國槐和刺槐種子萌發(fā)的影響

張?zhí)礻盘颇z彭祚登馮天爽劉春和Summary[目的]探究城市排水污泥制有機(jī)營養(yǎng)土對(duì)國槐和刺槐播種育苗及林下自然更新的影響，為其在國槐和刺槐林人工培育中的應(yīng)用提供科學(xué)依據(jù)。[方法]將污泥制有機(jī)營養(yǎng)土產(chǎn)品與苗圃沙土按不同比例混合，加入蒸餾水浸泡不同天數(shù)后并制成浸提液，用作種子發(fā)芽試驗(yàn)過程中的營養(yǎng)液，在實(shí)驗(yàn)室的人工氣候箱中進(jìn)行種子萌發(fā)試驗(yàn)。[結(jié)果]添加適量污泥浸提液對(duì)國槐種子的發(fā)芽率、發(fā)芽進(jìn)程、發(fā)芽效率和萌發(fā)潛力都有促進(jìn)作用，大多以污泥產(chǎn)品占比20%影響更為顯著，污泥用量過多反而會(huì)抑制國槐種子的萌發(fā)，總體表現(xiàn)為添加少量污泥促進(jìn)萌發(fā)、過量污泥抑制萌發(fā)的效果;與國槐種子的結(jié)果相似，當(dāng)污泥產(chǎn)品占比為20%時(shí)，刺槐種子的大多數(shù)指標(biāo)都表現(xiàn)為對(duì)種子萌發(fā)有促進(jìn)作用，但污泥施入對(duì)刺槐的發(fā)芽指數(shù)有抑制作用。并且浸提時(shí)間越長，對(duì)國槐和刺槐種子的萌發(fā)更加有益。[結(jié)論]城市排水污泥制有機(jī)營養(yǎng)土適量用作國槐和刺槐播種育苗的基肥和種肥是可取的，但仍需在實(shí)際生產(chǎn)中進(jìn)行完善，充分考慮其合理用量并應(yīng)用推廣。Key排水污泥制有機(jī)營養(yǎng)土;種子萌發(fā);國槐;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