不同品种三叶草覆盖对旱地苹果园土壤理化特性和叶片生理特征的影响
打开文本图片集
Effects of Clover Mulch on Soil Physical and Chemical Properties andLeaf Physiological Characteristics in Dryland Apple Orchards
HU Wen 1，2 ， ZHANG Pengpeng1.2，， ZHUANG Liping1，2，WANG Pengli 1，2 ， ZOU Yangjun 1，2* （1.ColegeofHorticlture，NorthwestA&FUnivesityhaaniYangling7oo，China;2.LuochuanAppleTestStation，Yan'an City，ShaanxiProvince，ShaanxiYan'an727499，China）
Abstract：Inordertoinvestigate theeffctsof mulchingwithdiferentclover varietiesonsoilphysicochemical propertiesand leaf physiological characteristicsof anappleorchard，theadvantageous clovervarieties suitable for dryland orchard planting were identified.Theefects of grass mulchingon soil physicochemical propertiesand leaf physiologicalcharacteristics were investigatedbyplanting differentvarieties ofclover（crimson clover，whiteclover andred clover）betweenclear tilage，withclearing cultivationas thecontrol.Theresults showedthat，compared with the clear-tilage treatment，the crimson cloversignificantly increased soil moisture content and reduced soil bulk mass，whiletheredcloversignificantlyincreasedsoilporosity.Compared with theclear-tilage treatment，crimson clover effectively increased thecontents of soil organic materand total phosphorus，significantlyreducedthe soil pH，increased theactivities of soil sucraseandureaseactivities，and whiteclover significantly increased total nitrogencontentandalkalinephosphataseactivityinsoil.Comparedwith the clear-tilage treatment，whiteclover significantly increased the contents of total nitrogen， Mg and net photosynthetic rate of apple leaves，crimson clover significantly increased the contents of chlorophyll b ，total chlorophyll，carotenoid and stomatal conductance，water use efficiency，and decreased intercellular CO 2 concentration of apple leaves，red clover effectively increased the transpirationrate of appleleaves.Inconclusion，crimson clover was the best grassvariety for clover mulchindry appleorchards，whichcould significantly improve soilcomprehensive fertilityandleaf physiologicalfunctionof apple leaves.Above results provided scientific basis for grass management in dryland orchards. Keywords：covered with grass；clover；soil physicaland chemical properties;leaf physiological characteristics
陕西省为我国苹果的主产区之一，苹果种植面积和产量均居全国前列。（剩余11001字）
