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Acta Horticulturae Sinica ›› 2023, Vol. 50 ›› Issue (8): 1739-1746.doi: 10.16420/j.issn.0513-353x.2022-0669

• Cultivation Physiology & Biochemistry • Previous Articles     Next Articles

Effects of Light Duration and Intensity on Yield Formation of‘Shine- Muscat’Grape

CAO Xiongjun1, HAN Jiayu1, CHENG Guo1, WANG Bo2, MA Guangren3, LIN Ling3, TAN Zongkun4, HUANG Qiumi1, CHEN Xiao1, CHEN Fuyi3, SHI Xiaofang1, PAN Fengping1, BAI Xianjin1,*()   

  1. 1 Grape and Wine Research Institute,Guangxi Academy of Agricultural Sciences,Nanning 530007,China
    2 College of Agriculture,Guangxi University,Nanning 530004,China
    3 Guangxi Zhencheng Agriculture Co.,Ltd.,Nanning 530007,China
    4 Guangxi Meteorological Science Research Institute,Nanning 530022,China
  • Received:2023-03-15 Revised:2023-06-15 Online:2023-08-25 Published:2023-08-23
  • Contact: BAI Xianjin

Abstract:

To explore the relationship between duration or intensity of sunlight and the yield of grape harvest. The light durations and intensities recorded in the summer fruit growing season with those provided by meteorological department were analyzed. Light saturation point and light compensation point of leaves of‘Shine-Muscat’grape during different phonological stages,and the effects of light duration and intensity on net photosynthetic rate and yield of summer fruit of‘Shine-Muscat’grape were analyzed. The results showed that the total light duration recorded by the meteorological station based on direct sunlight was significantly lower than that recorded in the vineyard and did not fully include the light duration corresponding to the light intensity that is available for grape production. Light intensity significantly affected the net photosynthetic rate of‘Shine-Muscat’grape leaves. The light compensation point and light saturation point of leaves of‘Shine-Muscat’grape varied in different developmental stages. The light compensation point of leaves ranged from 22.43 to 49.77 μmol · m-2 · s-1,and the light saturation point of leaves ranged from 1 108.07 to 1 303.01 μmol · m-2 · s-1. The formation of grape yield is more closely related to the sunshine hours above the light intensity at the light compensation point,and under the light hours above the light compensation point of 1 524.1 h(2018)and 1 579.8 h(2019),the yield of grapes was 13 701.9 and 17 774.9 kg · hm-2 respectively,and the average soluble solids was more than 17 Brix°. Therefore,suggested that in grape production and quality evaluation,the effects of light hours and light intensity in grape growth and development cycle should be comprehensively considered based on the light saturation point and light compensation point of variety leaves.

Key words: grape, light hours, light intensity, yield