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獼猴桃貯藏期電參數(shù)和生理參數(shù)的變化
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國家自然科學(xué)基金資助項目(30471001)


Change of Electric Parameters and Physiological Parameters of Kiwi of Storage Period
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    摘要:

    以室溫(20℃)貯藏的“秦美”獼猴桃為研究材料,,在貯藏期間獲取果實復(fù)阻抗,、并聯(lián)等效電容和阻抗相角值的同時,,同步測定果實硬度等12個生理參數(shù),。結(jié)果表明,,獼猴桃復(fù)阻抗在貯藏末期顯著下降,,并聯(lián)等效電容在貯藏末期顯著上升,。隨著貯藏時間的延長,,果實的硬度、可滴定酸質(zhì)量濃度都呈下降趨勢,,可溶性固形物含量,、相對電導(dǎo)率呈上升趨勢,淀粉,、纖維素質(zhì)量比的減小與果實硬度的下降呈正相關(guān),。在特征頻率0.1kHz下, 復(fù)阻抗可量化硬度等8個生理參數(shù),,阻抗相角可量化5個生理參數(shù),,在特征頻率1MHz和1.58MHz頻率下,并聯(lián)等效電容可量化6個生理參數(shù),。

    Abstract:

    ‘Qinmei’ kiwifruit was used to investigate the change of electric properties and physiological parameters with the extension of storage time under the condition of storage at 20℃. Complex impedance (Z), parallel equivalent capacitance (Cp) and impedance angle (θ) three electrical parameters and 12 physiological parameters of fruits such as firmness were measured synchronously. The results showed that the Z of Kiwi dropped significantly on the late period of storage, Cp increased significantly on the late period of storage. Firmness and total acid (TA) of fruits were increased and total soluble sugar (TSS) was decreased with the extension of storage time. The reducing of content of starch and cellulose was positively correlated with the declining of fruit firmness.Z can quantify eight physiological parameters such as firmness of fruits, impedance angle (θ) can quantify five physiological parameters in the characteristic frequency of 0.1kHz.Cp can quantify six physiological parameters in the characteristic frequency of 1MHz and 1.58MHz.

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唐燕,杜光源,張繼澍.獼猴桃貯藏期電參數(shù)和生理參數(shù)的變化[J].農(nóng)業(yè)機械學(xué)報,2012,43(1):127-133. Tang Yan, Du Guangyuan, Zhang Jishu. Change of Electric Parameters and Physiological Parameters of Kiwi of Storage Period[J]. Transactions of the Chinese Society for Agricultural Machinery,2012,43(1):127-133.

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  • 在線發(fā)布日期: 2012-01-12
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