限根节水对苹果叶片荧光特性和产量、品质的影响

Effect of Water-saving and Root-limiting Treatments on Leaves Fluorescence Characteristics and Yield and Quality of Apple

以早熟苹果品种"嘎啦"和晚熟苹果品种"富士"为试材,研究了限根节水对苹果叶片荧光特性和果实产量、品质的影响。结果表明:在整个处理期内限根节水处理均使"嘎啦"和"富士"叶绿素含量高于对照水平;在盛果期灌水后期,限根节水处理叶绿素荧光参数Fv/Fo、Fv/Fm、ΦPSII、qP、NPQ和ETR值均不同程度高于对照水平,说明限根节水处理显著提高了苹果叶片光化学活性,提高了水分利用率,使果实产量、品质提高。

In order to investigate the effect of brick-buring root-limiting and water-retenting water-saving technology on fruit trees in orchard,with early maturing apple varieties ‘Gala＇and late maturing varieties ‘Fuji＇in Weifang as materials,the effect of water-saving and root-limiting treatments on leaves fluorescence characteristics and yield and quality of apple in full-ruit period were studied.The results showed that,effect of water-saving treatments on leaves fluorescence characteristics and yield and quality of apple were significantly different from the control.Among them,chlorophyll content was improved,under water-saving treatments treatments.Late irrigation in full-ruit period,chlorophyll fluorescence parameters potential activity of PSII,the maximum photochemical efficiency of PSII,PSII quantum yield,apparent rate of photosynthetic electron transport,coefficient of photochemical quenching,coefficient of non-photochemical quenching were all higher than the control.This indicated that water-saving treatments improved photochemical activity of fruit,thereby increased water use efficiency and fruit quality and yield.