Abstract:In order to explore the influence of irrigation upper control limit by small tube flow to the accumulated soil temperature, fruit growth index etc. of wine grape, adopting the field cultivation experimental method, carried out the irrigation test with small tube flow on wine grape. The results showed that: The accumulated soil temperature was decreased with increasing soil depth, the accumulated soil temperature with fruit growth was presented a positive correlation relationship. The small tube flow was more useful to increase the accumulated soil temperature and fruit growth compared with the furrow irrigation. When the irrigation upper limit was 90% of field capacity, the grape fruit diameter, single fruit ear weight total were higher than other treatments with highest yield, compared with control treatment the yield was increased 44.95%, the difference was significant (P<0.01). When the irrigation upper limit was 80% of field capacity, the grape fruit acid was minimum, the sugar content was maximum up to 236.17 g·L^-1. It was indicated that 90% of field capacity was the irrigation upper limit for optimal adding production, the irrigation upper limit of 80% field capacity was the best useful to improve grape quality.