阿克苏红富士苹果不同采收期微量元素及糖类物质的动态变化

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中图分类号：S661.1 文献标识码：A

Dynamic Changes of Trace Elements and Carbohydrates at Different Harvest Periods in Aksu Red Fuji Apples

XU Ying，XU Xueli，YANG Junxiang，BAO Dongdong，LI Juan* (Inspection and Testing Center of Aksu Region，Aksu Xinjiang 843ooo，China)

Abstract: 【Objective】 The effects of bagging treatment on the accumulationof trace elements (K，Na,Ca,Mg）and car bohydrates（fructose，glucose，sucrose，sorbitol) were investigatedin AksuRedFuji appes during diferent harvest stages，aiming to establishoptimal harvest windows for baggedand non-bagged fruits.【Methods】Apples were sampled periodically from pre-physiological maturitytoover-ripening stages.Mineral elements and carbohydratecontents werequantifiedusing standardized analytical methods. 【Results】Non-bagged fruits exhibited significantly higher levels of K ( 25.6% higher on October 30)，Na (72.1% higher on October 22)，and Ca ( 17.2% higher on October 3O） compared to bagged fruits. In contrast, Mg content was 29.7% higher in bagged fruits on October 22. Carbohydrate analysis revealed that fructose，glucose，and sucrosefollowedatypicalacumulationpattrn(nitial icreasefollowedbystabilization/decline），whilesorbitolcontentproges sively decreased. Non-bagged fruits contained 23.7% (October 26)， 50⋅2% （November 7），and 74.5% （November 3） more fructose，glucose，and sucrose，respectively，thanbagged fruits 【Conclusion】Bagging suppressed the accumulationof K,Na, Ca，and major sugars but enhanced Mg retention and delayed sorbitol metabolism. For non-bagged fruits，the optimal harvest period was late October toearly November，coinciding with peak mineral and sugar accumulation for superiorquality and stor ability.Bagged fruitsreachedoptimalmaturityarlier(mid-to-lateOctober)，whensugar-mineralbalanceandelevatedsorbitol levelsfavored qualitypreservation.These findings provideactionable guidelines forharvesttiming decisions tomaximize the commercial value of Aksu Red Fuji apples.

Key words:apple；Aksu；harvest period；trace elements；carbohydrate:

阿克苏地区作为新疆优质苹果的核心产区，具有得天独厚的自然条件，包括充足的日照、适宜的温差和优质的土壤，这些因素共同造就了阿克苏苹果的高品质。（剩余8501字）