Crops ›› 2019, Vol. 35 ›› Issue (2): 46-50.doi: 10.16035/j.issn.1001-7283.2019.02.007

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Analysis of Fresh Corn Standards and Its Countermeasures in China

Lijuan Sun1,Zhihong Zhao2,Juan He3,Bujun Wang1   

  1. 1 Institute of Crop Sciences, Chinese Academy of Agricultural Sciences/Laboratory of Quality & Safety Risk Assessment for Cereal Products (Beijing), Ministry of Agriculture and Rural Affairs, Beijing 100081, China;
    2 Seed Management Station of Shangqiu, Shangqiu 476000, Henan, China
    3 National Agriculture Technology Extension and Service Center, Beijing 100125, China;
  • Received:2018-09-29 Revised:2019-02-18 Online:2019-04-15 Published:2019-04-12
  • Contact: Bujun Wang

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Abstract:

We analyzed the problems of fresh corn standards focusing on NY/T 523-2002 sweet corn and NY/T 524-2002 waxy corn linking with industrial utilization in China. The problems of the two standards: they were dispersed with other specialty corn standards; there were no clear rules of fresh sampling; the description of grade index was vague and there was no determination of soluble sugar content in sweet corn standards; the description of appearance evaluation was simple and general; the cooking quality evaluation was not detailly explained. The problems of standards lacking links with industry: standards for new sweet and waxy corn were lack; the key indicators of sweet corn was too low for the marketplace; the sensory evaluations of corn were lack in timeliness; the description of appearance evaluation couldn't meet the industry demand; the total sensory score of second-class and third-class corn were too low for the marketplace and industry. According to the current situation and industry demand, the countermeasures and suggestions for solving the problem and servicing industry development were proposed: the fresh corn standards should be integrated with other specialty corn standards; it was necessary to give a clear description for freshness; the sampling procedures should be formulated right way; suitable testing and evaluation methods should be strictly followed; it was necessary to optimize the quality evaluation and improve the grading requirements of the sweet and waxy corn.

Key words: Fresh corn, Standards, Analysis of question, Countermeasures

Table 1

The distribution of soluble sugar content of national and province approved sweet maize varieties from 2001 to 2017 and that samples in testing center from 2000 to 2015"

可溶性糖含量Soluble sugar content 国审、省审品种National and province approved variety 检测中心样品Testing center sample
干基 (%)
Dry base		 鲜样* (%)
Fresh sample		 干基Dry base 鲜样Fresh sample 干基Dry base 鲜样Fresh sample
个数
Number		 占比(%)
Percentage		 个数
Number		 占比(%)
Percentage		 个数
Number		 占比(%)
Percentage		 个数
Number		 占比(%)
Percentage
≥30 ≥9 83 22.7 47 51.1 38 69.1 30 43.5
≥27 ≥8 101 27.7 62 67.4 40 72.7 44 63.8
≥23 ≥7 143 39.2 73 79.3 44 80.0 53 76.8
≥20 ≥6 178 48.8 79 85.9 45 84.9 61 88.4
≥10 ≥3.3 279 76.4 88 96.7 51 96.2 68 98.6
≥8 ≥2.4 290 79.5 90 97.8 51 96.2 68 98.6
总数Total 365 - 92 - 53 - 69 -
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