Acta Agriculturae Zhejiangensis ›› 2021, Vol. 33 ›› Issue (3): 422-428.DOI: 10.3969/j.issn.1004-1524.2021.03.06

• Horticultrual Science • Previous Articles     Next Articles

Effect of protein hydrolysate-based amino-acid fertilizers on fruit quality of Hongmeiren citrus hybrid

WEN Mingxia1, ZHANG Shunchang2, WU Shaohui1, HU Lipeng2, WANG Peng1, HUANG Bei1   

  1. 1. Zhejiang Citrus Research Institute, Taizhou 318026, China
    2. Zhejiang Taizhou Agricultural Materials Co.,Ltd., Taizhou 318020, China
  • Received:2020-06-17 Online:2021-03-25 Published:2021-03-25

Abstract:

To establish a fertilization model, reduce the use of chemical fertilizers and improve the citrus tree potential, the protein hydrolysate-based amino-acid fertilizers (PHs) were tested by spraying on the leaves of Hongmeiren citrus hybrid during different fruit growth periods. Starting from two thirds citrus flower faded, 800 times of PHs was sprayed every 20 days, the spraying time of other treatments was 20 days later gradually, and each treatment was sprayed three times in the annual growth cycle, to study the effects of PHs on chlorophyll content, fruit color and quality of spring shoot leaves of Hongmeiren. The results showed that the chlorophyll content of the spring shoots of Hongmeiren was significantly increased by 20.6% and 22.6%, respectively, when spraying PHs at the beginning of two thirds citrus flower faded and 60 days after two thirds of citrus flower faded. The values of color L, color a and color b of the citrus peel with PHs were positive, and they were significantly higher than those of the treatment of spraying PHs at the time of two thirds of citrus flower faded, and the fruit was orange-red with better brightness. The fruit edible rate, soluble solids and vitamin C content of the treatments with PHs were higher than those of the control group, while the titratable acid content was lower than that of the control group, and the fruit quality was better. In addition, spraying PHs at the time of two thirds citrus flower faded can increase the brightness of the citrus peel, promote the fruit color, the fruit weight was larger and conducive to increase the yield, the peel was thinner so that the edible rate increased. Therefore, it is recommended to start spraying on the leaves of Hongmeiren at the time of two thirds of citrus flower faded, spraying once every 20 days, and spraying three times continuously was better.

Key words: protein hydrolysate-based amino-acid fertilizer, Hongmeiren citrus hybrid, fruit chroma, quality

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