贮运过程中振动损伤对蓝莓品质的影响

doi:10.11707/j.1001-7488.20200905

Abstract

Abstract:

Objective: In this paper, the mechanical vibration of blueberry fresh fruits in logistics and transportation vehicles was simulated, and the quality change law under the interaction of different mechanical vibration frequency and different storage and transportation temperature conditions was analyzed, so as to provide a reference for the cold chain transportation and circulation of blueberry fresh fruit after harvest. Method: Fresh "Lanfeng" blueberries were selected and stored in transparent plastic small package at 4, 10 and 25℃. The blueberry package was placed on the vibration test bench that was subjected to the simulated road transportation. Through the frequency sweep vibration experiment, the measured natural frequency of the blueberry package was 85 Hz. The three vibration amplitudes were selected to carry out the blueberry constant frequency vibration experiment. After the simulated transport vibration test, the blueberry packages were immediately placed at 4, 10 and 25℃ for storage test, and the fresh blueberries that did not undergo vibration were used as the control group under the three storage temperature conditions. A total of 7 indicators including malondialdehyde (MDA) content, soluble solids (SSC) content, ascorbic acid (Vc) content and hardness were evaluated. Changes of storage quality of mechanical vibrating blueberries at 4, 10 and 25℃ were studied. Result: During storage, the vibration significantly (P < 0.05) affected MDA and anthocyanin content of blueberries, whereas the storage temperature factors significantly (P < 0.05) affected Vc, SSC content and hardness of blueberries. The interaction of two factors had a more significant effect on the content of SSC, Vc and titratable acid (TA) of blueberries. The equation between MDA, SSC and Vc content on storage and transportation temperature (X₁) and vibration frequency (X₂) was obtained by regression analysis, that could provide a theoretical basis for predicting the maturity and even decline of blueberries. Conclusion: Both vibration frequency and storage temperature affect storage quality of blueberry. Vibration and high temperature accelerate the rate of blueberry corruption. Therefore, in the process of storage and transportation of blueberries, the resonance effect of the package at the natural frequency of 85 Hz should be reduced. Storage at 4℃ is more conducive to the stability of various indicators of blueberry fruit and delaying fruit senescence.

Key words: fresh blueberry fruit, mechanical vibration, storage and transportation temperature, storage and transportation quality

CLC Number:

TS255.3

Yang Li,Xi Zhang,Yeli Chen,Meishuang Liu. Effect of Vibration Damage on Blueberry Quality during Storage and Transportation[J]. Scientia Silvae Sinicae, 2020, 56(9): 40-50.

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试验 Tests	因素水平 Factors and levels	丙二醛含量 Content of MDA		可溶性固形物含量 Content of SSC		花青素含量 Content of Anthocyanin		维生素C含量 Content of Vc		硬度 Hardness		可滴定酸含量 Content of titratable acid		失重率 Weigh loss rate
试验 Tests	因素水平 Factors and levels	平均值±标准差 Mean±SD	P	平均值±标准差 Mean±SD	P	平均值±标准差 Mean±SD	P	平均值±标准差 Mean±SD	P	平均值±标准差 Mean±SD	P	平均值±标准差 Mean±SD	P	平均值±标准差 Mean±SD	P
贮藏温度 Storage temperature	4 ℃	11.88±2.20	0.214	9.10±1.39	0.048	4.29±1.01	0.786	21.10±2.52	0.029	1.43±0.27	0.047	5.33±0.46	0.127	6.80±4.79	0.523
	10 ℃	12.62±2.54		9.82±1.74		4.38±1.01		19.65±3.80		1.34±0.27		5.26±0.48		7.50±5.28
	25 ℃	13.28±2.97		10.53±2.07		4.52±1.33		17.88±4, 52		1.20±0.30		5.03±0.52		8.81±6.34
振动频率 Vibration frequency	75 Hz	11.47±1.94	0.029	9.57±1.78	0.656	4.22±1.01	0.049	20.33±3.71	0.312	1.36±0.28	0.764	5.34±0.37	0.116	7.25±5.43	0.760
	85 Hz	12.69±2.61		10.09±1.88		4.89±1.21		18.56±4.13		1.31±0.29		5.03±0.53		8.46±5.79
	90 Hz	13.63±2.84		9.80±1.87		4.07±0.98		19.73±3.76		1.30±0.31		5.26±0.53		7.39±5.40
贮藏温度×振动频率 Storage temperature× Vibration frequency		12.59±2.61	0.592	9.82±1.83	0.044	4.4±1.11	0.748	19.54±3.88	0.025	1.32±0.29	0.473	5.21±0.49	0.032	7.70±5.48	0.822

指标回归参数 Regression parameter of indicators	丙二醛含量 Content of MDA					可溶性固形物含量 Content of SSC				花青素含量 Content of Anthocyanin				维生素C含量 Content of Vc
指标回归参数 Regression parameter of indicators	系数 Coefficients	SE	t	P		系数 Coefficients	SE	t	P	系数 Coefficients	SE	t	P	系数 Coefficients	SE	t	P
回归显著性 Regressive significance	Sig=0.005					Sig=0.130				Sig=0.998				Sig=0.161
(常量Constants)	3.176	4.297	0.739	0.463		9.979	3.259	3.062	0.003	4.292	2.021	2.124	0.038	19.956	6.767	2.949	0.004
贮藏温度 Storage temperature	0.085	0.051	1.652	0.104		0.075	0.039	1.916	0.060	-0.001	0.025	-0.056	0.955	-0.144	0.081	1.778	0.080
振动频率 Vibration frequency	0.105	0.054	1.952	0.055		-0.008	0.041	-0.198	0.843	0.001	0.025	0.056	0.956	0.009	0.085	0.104	0.918

指标回归参数 Regression parameter of indicators		硬度 Hardness								可滴定酸含量 Content of titratable acid				失重率 Weight loss rate
指标回归参数 Regression parameter of indicators		系数 Coefficients			SE		t		P	系数 Coefficients	SE	t	P	系数 Coefficients	SE	t	P
回归显著性 Regressive significance		Sig=0.285								Sig=0.334				Sig=0.784
(常量Constants)		1.597			0.503		3.176		0.002	5.578	0.867	6.434	0.000	8.337	9.487	0.879	0.383
贮藏温度 Storage temperature		-0.008			0.006		-1.249		0.217	-0.013	0.011	1.216	0.229	0.077	0.114	0.676	0.502
振动频率 Vibration frequency		-0.002			0.006		-0.381		0.704	-0.003	0.011	-0.274	0.785	-0.017	0.119	-0.141	0.888

Effect of Vibration Damage on Blueberry Quality during Storage and Transportation

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