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不同保鮮環(huán)境荔枝褐變的理化指標(biāo)識(shí)別方法研究
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國(guó)家自然科學(xué)基金項(xiàng)目(31571561),、現(xiàn)代農(nóng)業(yè)產(chǎn)業(yè)技術(shù)體系建設(shè)專項(xiàng)資金項(xiàng)目(CARS-33-13)和廣東省高等學(xué)校優(yōu)秀青年教師培養(yǎng)計(jì)劃項(xiàng)目(Y92014025)


Physicochemical Indexes of Browning Identification of Litchi under Different Storing Environments
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    摘要:

    為探究理化指標(biāo)識(shí)別荔枝褐變的可行性,,試驗(yàn)獲取了3種常用保鮮環(huán)境(常溫保鮮,、冷鮮柜保鮮和氣調(diào)保鮮)荔枝貯藏過(guò)程中褐變程度,,色差a*,、b*,、L*,,可溶性固形物含量(TSS)和硬度變化,。常溫,、冷鮮柜和氣調(diào)3種保鮮環(huán)境荔枝褐變指數(shù)隨褐變程度逐漸增大,,其中常溫保鮮荔枝增大最快,冷鮮柜保鮮荔枝其次,氣調(diào)保鮮荔枝較慢,。理化指標(biāo)色差a*,、b*、L*和硬度均隨褐變指數(shù)增大呈減小的趨勢(shì),,TSS隨褐變指數(shù)增大變化不明顯,。采用線性判別分析(LDA)對(duì)常溫、冷鮮柜和氣調(diào)3種保鮮環(huán)境荔枝褐變程度識(shí)別正確率分別為96.67%,、100%和100%,。但冷鮮柜和氣調(diào)保鮮荔枝4級(jí)與5級(jí)果LDA分析數(shù)據(jù)點(diǎn)較近,實(shí)際分類易發(fā)生混淆,。LDA可較好地識(shí)別1級(jí),、2級(jí)、3級(jí)和4~5級(jí)荔枝果實(shí),。采用偏最小二乘回歸(PLSR)建立預(yù)測(cè)模型同時(shí)對(duì)3種保鮮環(huán)境荔枝褐變程度預(yù)測(cè)時(shí),,訓(xùn)練集與測(cè)試集測(cè)試值與實(shí)際值的擬合決定系數(shù)R2分別為0.85和0.90,證明了不同保鮮環(huán)境荔枝通過(guò)同一個(gè)模型進(jìn)行預(yù)測(cè)的可行性,。試驗(yàn)揭示了褐變,、理化指標(biāo)和保鮮時(shí)間之間存在的關(guān)系,證明了通過(guò)理化指標(biāo)識(shí)別褐變程度的可行性,,可為水果褐變準(zhǔn)確識(shí)別以及商品價(jià)值評(píng)價(jià)提供參考,。

    Abstract:

    For exploring the feasibility of litchi browning identification based on physicochemical indexes, the browning indexes, chromatic aberration a*, b* and L* value, total soluble solids content (TSS) and hard degree of litchi in storing under three common used environments (room temperature environment, refrigerator environment and controlled atmosphere environment) were measured. Under the above three environments, browning indexes of stored litchi were increased with the increasing storing time. However, the increasing speed of stored litchi under room temperature environment was the most fast, the refrigerator environment was the second, and the controlled atmosphere environment was the third. Physicochemical indexes, including chromatic aberration a*, b*, L* value, and hard degree, were decreased with the increasing browning indexes. But the change of TSS was not obvious with the increasing browning index. The accuracy of linear discriminant analysis (LDA) for brown degree identification of stored litchi under room temperature environment, refrigerator environment and controlled atmosphere environment were 96.67%, 100% and 100%, respectively. However, the litchi samples of 4th browning index were similar with those of 5th browning index under both refrigerator environment and controlled atmosphere environment, which may cause confusion in practical classification and identification. Thus, LDA can identify the litchi samples of 1st, the 2nd, the 3rd, the 4th~5th browning index effectively. The results of partial least squares regression (PLSR) for stored litchi under above three environments show that fitting coefficients (R2) of predicted value and actual value were 0.85 and 0.90, respectively, which proves that litchi could be predicted by using the same model but under different environments. This experiment has revealed the relationships among browning indexes, physicochemical indexes and storing time, which proves the feasibility of physicochemical indexes for litchi’s browning identification, and provides a reference for fruit’s browning identification and value estimation.

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徐賽,陸華忠,周志艷,呂恩利,王亞娟,楊徑.不同保鮮環(huán)境荔枝褐變的理化指標(biāo)識(shí)別方法研究[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2016,47(3):221-227. Xu Sai, Lu Huazhong, Zhou Zhiyan, Lü Enli, Wang Yajuan, Yang Jing. Physicochemical Indexes of Browning Identification of Litchi under Different Storing Environments[J]. Transactions of the Chinese Society for Agricultural Machinery,2016,47(3):221-227.

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  • 收稿日期:2015-12-08
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  • 在線發(fā)布日期: 2016-03-10
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