›› 2017, Vol. 29 ›› Issue (7): 1208-1215.DOI: 10.3969/j.issn.1004-1524.2017.07.21

• Biosystems Engineering • Previous Articles     Next Articles

Dynamic simulation model for branch growth of Red Globe grape

CHEN Tianyu1, 2, GAO Xiaoyang1, 2, 3, *, WU Xiang1, 2, WU Jiling2, 3, 4, YAN Renzhe1, 2, LI Hongling1, 2, 3   

  1. 1. College of Engineering, Gansu Agricultural University, Lanzhou 730070, China;
    2.Gansu Key Laboratory of Viticulture & Oenology, Lanzhou 730070, China;
    3.Gansu Province Key Laboratory of Aridland Crop Science, Lanzhou 730070, China;
    4. College of Life Science and Technology, Gansu Agricultural University, Lanzhou 730070, China
  • Received:2017-02-11 Online:2017-07-20 Published:2017-07-24

Abstract: Based on experimental data in 2015 and 2016, the dynamic changes of the growth of newborn branches of the main cultivated grape variety Red Globe in Gansu Province was analyzed. For two consecutive years from April 2015 to September 2016, 9 grape plants with abundant sunshine were chosen in different locations of the test garden from the germination to berry mature period, and numbered tags were put on the bearing shoot and foliage branch of the side branches respectively. The length and thickness of the branches were measured once every two days in regular season, but once a day during the period of vigorous internode growth between the early April and late May. The variation was observed and recorded. The experimental data showed that the growth process of newborn grape branches followed the “S” growth rule, which grew slowly at first, quickly in the middle period, and then at a diminishing rate into the end. By using physiological development time (PDT) as a measurement tool, Richards equation was applied to simulate the dynamic process of internode elongation and thickening of newborn grape branches; meanwhile, the linear equation between the inflorescence growth (cluster) and the thickness of different internodes was established. The results of simulation model showed, the range of RMSE (root mean square errors) value of internode elongation simulation was 0.743-2.632 cm, while that of the internode thickness simulation value was 0.019-0.036 cm. And the range of RMSE value of inflorescence (cluster) simulation model to the internode thickness simulation value of Red Globe grape variety was 0.035-0.149 cm.

Key words: grape, Richards equation, newborn branches, internode, Red Globe

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