基于微压痕硬度的水蜜桃成熟度无损分级方法研究

Non-destructive Maturity Classification of Peach Fruits Based on Micro-indentation Hardness

以“湖景蜜露”水蜜桃为试验材料,研究了色泽参数、穿刺硬度与人工成熟度分级之间的对应关系,建立了成熟度的微压痕硬度分级法,并通过模拟物流试验研究了其对物流品质的影响。结果表明:水蜜桃非红色区域色泽参数a*、h°与穿刺硬度的一致性较高,但着色对色泽分级法的干扰很大,色泽参数分级法较适用于低成熟度果实分级,而不适用于高成熟度。无论成熟度高低,微压痕硬度与穿刺硬度一致性都较高,呈显著性指数关系(R2=0.9312),微压痕硬度分级以下压距离0.5 mm为宜,不会对果实表面造成实质性损伤,成熟度区间接近等分,在44~69.6 g之间,有利于进一步等级划分。水蜜桃成熟度对物流品质有显著影响,成熟度越低,物流寿命越长,但过低成熟度的果实后熟后达不到正常成熟品质。微压痕硬度分级法提高了分级精准度,有利于调控果实后熟进程,提高物流品质,为水蜜桃成熟度无损分级和实际应用提供了理论依据。

Taking‘Hujingmilu’peach fruits as the experimental material,the corresponding relationships between color parameters,puncture hardness and artificial maturity classification were studied.The micro-indentation hardness classification method of maturity was established,and its effects on logistics quality were analyzed by simulated logistics experiments.The results showed that the consistency of color parameters a*,h°and puncture hardness in the non-red area of peach fruits was high,but coloring had a great influence on the accuracy of color classification method,and thus color classification method was more suitable for the classification of peach fruits of low maturity,but not high maturity.The consistency between micro-indentation hardness and puncture hardness was always high regardless of low maturity or high maturity,presented as a significant exponential relationship(R2=0.9312),the pressing distance was 0.5 mm,which would not cause substantial damage,and the maturity ranges of micro-indentation hardness classification were close to equal,at 44~69.6 g,which was conducive to further classification.There was a significant impact of maturity on logistics quality of peach fruits,the lower the maturity,the longer the logistics life,but the peach fruits of the lower maturity could not reach the normal maturity quality.The micro-indentation hardness classification improved the classification accuracy,which was conducive to regulating the post ripening process,improving logistics quality,and provided a theoretical basis for non-destructive classification of peach maturity and practical application.