南方农业学报2023，Vol.54Issue(8)：2360-2368,9.DOI:10.3969/j.issn.2095-1191.2023.08.017
纳米钾肥对桃幼苗生长和桃树叶片生理特性的影响
Effects of nano-potassium fertilizer on peach seedling growth and physiological characteristics of peach tree leaves
摘要
Abstract
[Objective]The purpose of the study was to investigate the effects of nano-potassium fertilizer on the growth of peach seedlings and the physiological characteristics of adult peach tree leaves,and to provide a theoretical ba-sis for the application of nano-fertilizers in peachtree cultivation.[Method]Using Prunus persica Batsch seedlings and Chunmei adult peach trees as test materials,the effects of nano-potassium fertilizers and three traditional fertilizers(potas-sium sulfate,soluble fertilizer and compound fertilizer)on seedling biomass,root morphology,photosynthetic perfor-mance,and physiological characteristics of adult tree leaves were compared.[Result]On peach seedlings,except that there was no significant difference(P>0.05,the same below)between nano-potassium fertilizer and potassium sulfate fer-tilizer in plant height,underground fresh weight and root morphology indicators,nano-potassium fertilizer could signifi-cantly increase plant height,stem diameter,the number of leaves,leaf surface area,dry(fresh)weight of aboveground and underground parts,and root system morphological indicators compared with other fertilizer treatments(P<0.05,the same below).Meanwhile,nano-potassium fertilizer also significantly increased the contents of chlorophyll a,chlorophyll b,total chlorophyll and the maximum quantum yield of photosystem Ⅱ(Fv/Fm)in the leaves of peach seedlings.On adult peach trees,compared with potassium sulfate fertilizer,nano-potassium fertilizer significantly increased the contents of total chlorophyll,soluble sugar,homogenate protein and proline in leaves by 30.2%,48.6%,40.4%and 33.6%respec-tively.The single fruit weight of peach fruits was significantly increased by 17.5%.The effects of soluble fertilizer and compound fertilizer on the leaves and fruits of adult peach trees were similar to those of nano-potassium fertilizer without reaching significant difference.[Conclusion]Comprehensive considering morphological and physiological indicators,compared with traditional potassium fertilizer,nano-potassium fertilizer can promote the growth of aboveground and un-derground parts of peach seedlings to varing degrees,and increase the chlorophyll content and photosynthetic perfor-mance of young and adult peach tree leaves,to improve tree nutrient and fruit growth,which is expected to be popularized as a new type of fertilizer in practical production of peach in the future.关键词
桃/纳米钾/施肥/幼苗生长/叶片生理特性Key words
peach/nano-potassium/fertilization/seedling growth/physiological characteristics of leaves分类
农业科技引用本文复制引用
李曼,张东梅,黄雪,刘军伟,朱凯杰,李国怀..纳米钾肥对桃幼苗生长和桃树叶片生理特性的影响[J].南方农业学报,2023,54(8):2360-2368,9.基金项目
国家桃产业技术体系建设专项(CARS-30) China Agriculture Research System—Peach(CARS-30) （CARS-30）
