With the field observation data from 2002 to 2003, following the paraller observation concept, the growth rule of 8 different maturing variety of wine grapes over inland Hexi corridor, Gansu province, China and related meteorological factors are discussed using mathematic statistical method. The results show that:
(1)The growth process of new tip and fruitage is parabola type with key growth periods from early May to mid-June and from early July to early August. The sugar content accumulating is "S" type with key period from mid-August to early September. The peak growth value of branches, fruitage and sugar concentration occurs sequentially with the mid-early-maturing type, followed by mid-late-maturing type and then late-maturing type .
(2)For the mid-early-maturing, the mid-late-maturing and the late-maturing types, accumulated temperatures(≥10℃) needed are 2800-2900℃, 2900-3100℃ and 3000-3200℃ respectively. The accumulated temperatures for different growth periods are as following (≥10℃): new tips 35～50d，620-750℃,florescence 7-15d, 130-320℃, berry 50-65d , 1100-1400℃ and mature 35-50d, 640-940℃.
(3)Positive correlations are found between the new tip growth rate and daily average temperature, sunlight duration and soil humidity. The fruit grain growth rate is positively correlated with relative humidity and precipitation, but reversely correlated with average temperature and maximum temperature. The sugar content accumulating is positively correlated with sunlight duration and heat factors, but reversely with humidity factors. The proper temperature for fruit grain is 20-21℃ with growth rate slowed down obviously when it is over 21℃. The new tips stop growing when it is lower than 11-12℃. And when it is lower than 7-7.9℃, the sugar content stop accumulating. The later the maturing type, the more sensitive it is to meteorological factors.
The impact of climatic conditions on wine grape growth is intended to benefit regional overall planing and industrialized farming.