Acta Agriculturae Zhejiangensis ›› 2023, Vol. 35 ›› Issue (10): 2346-2353.DOI: 10.3969/j.issn.1004-1524.20221338

• Horticultural Science • Previous Articles     Next Articles

Effects of different shading rates on fruit quality and photosynthetic characteristics of sweet cherry

TANG Wenjing1(), GONG Ronggao1,*(), CHU Yuanqi1, CHEN Chaoqun1, CHEN Hongxu1, RAN Maosheng2, ZHANG Yao1, YANG Wenlong1   

  1. 1. College of Horticulture, Sichuan Agricultural University, Chengdu 611130,China
    2. Wenchuan County Bureau of Science and Technology, Agriculture and Animal Husbandry, Wenchuan 623000, Sichuan, China
  • Received:2022-09-14 Online:2023-10-25 Published:2023-10-31

Abstract:

To explore the effects of different shading intensity on fruit quality and photosynthetic characteristics of sweet cherry, and to screen the optimal light conditions for the growth of sweet cherry, with Hongdeng as the material, the top of the tree was covered with sunshade net to simulate five treatments of full illumination (CK), shading rate 15% (A), shading rate 30% (B), shading rate 45% (C) and shading rate 60% (D) under different light intensities. To analyze the effects of different shading treatments on photosynthetic pigment content, net photosynthetic rate (Pn), transpiration rate (Tr), stomatal conductance (Gs), apparent quantum efficiency (AQY), light compensation point (LCP), dark respiration rate (Rd), light saturation point (LSP) and fruit quality of sweet cherry leaves. The results showed as follows: The sugar-acid ratio of sweet cherry fruits in treatment A was significantly higher than that in other treatments. With the increase of shading rate, anthocyanin, antioxidant capacity and total phenol increased first and then decreased, and there was no significant difference between treatment A and CK. The total amount of chlorophyll and carotenoid content of sweet cherry leaves were D>C>B>A>CK and C>D>B>CK>A. With the increase of shading rate, net photosynthetic rate (Pn), transpiration rate (Tr), stomatal conductance (Gs), apparent quantum efficiency (AQY), light compensation point (LCP), dark respiration rate (Rd) and light saturation point (LSP) increased first and then decreased. The photosynthetic capacity of treatment A was the strongest, while the growth and development of treatment B, C and D were limited by the severe lack of light energy. With the increase of shading rate, the color parameters lightness (L), red green (a) and yellow blue (b) values of A and B treatments and CK treatments were not significantly different, while the color parameters of C and D treatments was significantly higher than that of the control. The color difference pattern was the same as the color. It indicates that light shading is beneficial to improve the commercial property, and the best shading degree is within 15%.

Key words: sweet cherry, quality, photosynthetic characteristic, shading rate

CLC Number: