Journal of Tianjin Agricultural University ›› 2022, Vol. 29 ›› Issue (1): 24-27.doi: 10.19640/j.cnki.jtau.2022.01.005

• Researches and Scientific Notes • Previous Articles     Next Articles

Yellowing rule of blueberries in different periods and the relationship between growth and yellowing

Zhang Weilong1, Zhang Banban1, Yang Jinghui1,Corresponding Author, Liu Yanjun1, Zhang Chao2, Feng Guohua3   

  1. 1. College of Horticulture and Landscape, Tianjin Agricultural University, Tianjin 300392, China;
    2. Tianjin Shuofang Green Technology Development Co., Ltd, Tianjin 300384, China;
    3. Tianjin Municipal Highway Bureau, Tianjin 300384, China
  • Received:2020-01-08 Online:2022-03-31 Published:2022-04-14

Abstract: In order to understand the yellowing rule of blueberries and the effect of plant growth on yellowing, six blueberry varieties mainly planted in Jizhou District of Tianjin were used as test materials. Plant yellowing index, the growth index were determined after the new shoot stopped growing. The results showed that the yellowing index of ‘Berkeley’ ‘Brigitta’‘Northland’ and ‘Bluecrop’ decreased first, then increased and then decreased(2.76%-25.59%), chlorophyll content(0.31-1.19 mg/g), iron reductase activity(14.43-31.25 μmolFe2+/g·h), the effective iron content(1.72-2.70 mg/kg)rose first, then decreased and then rose again; the yellowing index of ‘Blue gold’ ‘Legacy’(3.40%-31.02%)decreased first and then increased, chlorophyll content (0.14-1.23 mg/g), iron reductase activity(12.14-29.71 μmolFe2+/g·h), and effective iron content(1.28-2.76 mg/kg)increased first and then decreased. ‘Berkeley’ ‘Bluecrop’ and ‘Legacy’ in the fruit maturity stage, ‘Brigitta’ and ‘Northland’ in the flowering stage, and ‘Bluegold’ after harvest all had the highest yellowing index and the lowest chlorophyll content, FCR activity, and available iron content. By comprehensive comparing it was found that the growth characteristics of ‘Bluegold’ and ‘Northland’ are stronger, and the average yellowing index is the highest.

Key words: blueberry, different periods, yellowing, growth characteristics

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