›› 2020, Vol. 32 ›› Issue (5): 753-761.DOI: 10.3969/j.issn.1004-1524.2020.05.01

• Crop Science • Previous Articles     Next Articles

Comparison of fitting models of light response curve of potato under different light quality

XU Jianmin1,2, SHI Hedi1, SHI Peihua1, ZHANG Zeyang1, XU Zhigang2,*   

  1. 1. College of Agriculture and Horticulture, Jiangsu Vocational College of Agriculture and Forestry, Jurong 212400, China;
    2. College of Agriculture, Nanjing Agricultural University, Nanjing 210095,China
  • Received:2020-01-06 Online:2020-05-25 Published:2020-05-29

Abstract: In order to study the photosynthetic capacity, light response curve and applicability of data fitting models of potatoes under different light quality treatments, the test was conducted with potato plantlets grown in pot under blue light (B), red light (R), B∶R=1∶3(B1R3), B∶R=1∶5(B1R5), B∶R=1∶7(B1R7) light spectrum to observe photosynthetic pigments, photosynthesis and light response curve of potato. The exponential model, rectangular hyperbolic model, non-rectangular hyperbolic model, Ye modified and modified exponential model were used to fitting light response curve, calculating photosynthetic parameters of potato under different light quality treatments. The results showed that the photosynthetic pigment content and photosynthetic capacity under the B1R7 treatment were the highest among the five treatments, the Ye modified and modified exponential model were better than the exponential model, rectangular hyperbolic model, non-rectangular hyperbolic model, especially in fitting Pnmax, LSP and Rd. The light compensation point, light saturation point and maximum net photosynthetic rate of potato under B1R7 treatment were the highest among the five treatments. The light quality combination of B1R7 could enhance photosynthesis of potato, and Ye modified and modified exponential model were more suitable for fitting potato light response curve.

Key words: light quality, light response curve, fitting model, potato

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