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1、附件3蘋果樹鉀素動(dòng)態(tài)規(guī)律與施肥管理樊紅柱，同延安*，趙營，劉汝亮（西北農(nóng)林科技大學(xué)資源環(huán)境學(xué)院，陜西楊陵712100）摘要：以“富士”蘋果樹為試材，對(duì)樹體生物量和各器官鉀含量及鉀累積動(dòng)態(tài)進(jìn)行了研究，確定果樹鉀素吸收、轉(zhuǎn)運(yùn)和分配規(guī)律，為合理施肥提供依據(jù)。結(jié)果表明，從3月26日到9月21日，果樹生長較快，果實(shí)采收后生長趨于緩慢；7月30日以后根系快速生長；植株及其地上部鉀累積量7月30日最大，根系鉀累積量年周期內(nèi)基本不變；早春樹體器官建造主要利用貯藏的鉀素，同時(shí)鉀素的分配隨生長中心的轉(zhuǎn)移而轉(zhuǎn)移；中后期果樹生長所需的鉀主要依靠根系從土壤中吸收；年周期內(nèi)果樹吸鉀量為87.16㎏/㎞2，果
2、實(shí)和葉片共帶走56.25㎏/㎞2的鉀，從3月26日到7月30日，吸收為54.67㎏/㎞2，占吸收總量的62.72%，果實(shí)采收后至1月15日，吸收量為32.49㎏/㎞2，占37.28%；果園年施鉀肥217.91㎏/㎞2，秋季基施81.23㎏/㎞2，幼果期追施136.68㎏/㎞2。關(guān)鍵詞：蘋果樹；鉀素；動(dòng)態(tài)分布；施肥管理PotassiumDynamicsandFertilizerManagementofAppleTreeFANHong-zhu,TONGYan-an*,ZHAOYing，LIURu-liang(CollegeofResourcesandEnvironmentalScie
3、nces,NorthwestSci-TechUniversityofAgricultureandForestry,Yangling,Shaanxi712100，China)Abstract:Potassiumfertilizerisanimportantfactorfortheyieldandqualityproductioninappletrees.Potassiumconcentrationandaccumulationindifferentpartsoftheappletreeswerestudiedinfield-grown“Fuji”appletrees(M.micro
4、malus.Makino)in2004and2005growingseasonsinShaanxiprovince,China.Theobjectiveofthisstudywastofindthedynamicofthepotassiumuptake,transportationanddistributionindifferentpartoftheappletreeinordertofertilizeproperly.Theresultsshowedthatthebiomassoftheplantandthepartsabovegroundvegetatedquicklyfro
5、mMarch26toSeptember21,anddevelopedslowlyafterfruitharvestedinSeptember21.ButrootssystembegantogrowafterJuly30.PotassiumaccumulationinplantandthepartsabovegroundwashighestinJuly30.Fruittreesmainusedstoragepotassiuminearlyspring,andpotassiumtransportationandassignmentshiftedalongwiththegrowthce
6、ntershift.Thenfruittreesusednutritionthatwasabsorbedfromthesoil.Total87.16kg/hm2potassiumwas收稿日期：基金項(xiàng)目：PPI/PPIC資助項(xiàng)目；農(nóng)業(yè)部948重大引進(jìn)項(xiàng)目作者簡(jiǎn)介：樊紅柱（1978—），男，陜西藍(lán)田人，碩士研究生，主要從事果樹生理與營養(yǎng)研究。*通訊作者，Email:tongyanan@nwsuaf.edu.cn.Tel:029-870812136uptakebyplantsduringtheyearand56.25㎏/hm2wasmoveawaybyfruitsandleaves.
7、FromMarch26toJuly30,54.67kg/hm2potassiumwasuptake,anditoccupied62.72%oftotaluptake.32.49kg/hm2potassiumwasstilluptakefromharvestedtimetoJanuary15,accountedfor37.28%oftotaluptake.Totalpotassiumfertilizationinappleorchardwas217.91kg/hm2inoneyea
