Relationship Between Water Content and Physical Properties and Quality of Sweet Corn at Different Harvesting Periods

doi:10.7668/hbnxb.20190309

Abstract

Abstract: In order to clarify the difference of moisture content and physical properties of sweet corn grains between different harvest dates, seven sweet corn varieties, such as Jingketian 608, were used as research materials in China, and 7 harvesting periods were set at 12, 15, 18, 21, 24, 27, 30 d after pollination to study sweet corn kernels in different harvesting periods. Changes in physical property values, sensory qualities, and water content of TPA. Principal component analysis was used to convert each TPA physical property parameter into three independent indicators. The membership function method was used to analyze the three comprehensive indicators, and the D value of TPA physical property evaluation in different harvesting periods was obtained. The results showed that：There were different degrees of correlation between physical property parameters, sensory quality parameters and water content of TPA in the tested sweet corn varieties. The sensory quality of the tested sweet corn varieties varied among different varieties and harvesting periods. The odor, flavor, color and sweetness increased first and then decreased with the delay of harvesting period, and the peaks appeared around 22 d. Among the different varieties, the average appearance quality, smell, flavor, and sweetness were relatively high in Jingketian 533, Jingketian 608, and Zhongnongdatian 413. The tenderness was relatively high with the scores of Miguel and Jingketian 608; the skin thickness was relatively high with Jingketian 608 and Zhongnongdatian 413. By comparing the comprehensive D value of physical properties of TPA, the total score of sensory quality and the water content, the total sensory quality score was above 85, the water content was between 76.39% and 74.56%, and the comprehensive D value of TPA was 0.23-0.46 rooms. The average D value of the average TPA physical property was relatively low in Mige, Jingketian 608, Zhongnongdatian 413, and the average sensory quality score was the highest in Jingketian 533 (80.65), followed by Jingketian 608 (80.31), Jingketian 158 and Jingketian 183 scores were relatively low, 76.8 and 76.7, respectively. The precipitation rate was relatively low in Zhongnongdatian 413 (0.72%/d), Jingketian 533 (0.77%/d) and Jingketian 608 (0.81%/d).

Key words: Harvest period, Sweet corn, TPA physical properties, Sensory quality, Water content

CLC Number:

S513.01

LU Baishan, DONG Hui, XU Li, SHI Yaxing, ZHAO Jiuran, FAN Yanli, YU Ainian. Relationship Between Water Content and Physical Properties and Quality of Sweet Corn at Different Harvesting Periods[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2019, 34(S1): 69-77. doi: 10.7668/hbnxb.20190309.

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