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The juice grape varieties imported from the United States, Catawba, Concord, gold rose, Rose Lu, Kang Baier as test material, 2009 -2 010 years, Yangling, Shaanxi, preliminary observations and documenting the biological characteristics of the phenophase, botanical characters, growth Habit, investigation and analysis of the powdery mildew, anthracnose, downy mildew resistance, and to study the photosynthetic characteristics. Aims to explore the differences between basic characteristics and different varieties of the introduction of juice grapes, and deepen the understanding of their agronomic traits and physiological characteristics of the system to provide a theoretical basis for the production, promotion and application. The study results show that: the introduction juice grape varieties began to sprout in late March, Rose Lu and Kang Baier mature in mid-August, is a medium maturing variety; Catawba, Concord, gold rose mature in mid-September , belonging to the late-maturing varieties. Introduction juice grape varieties not only in Yangling, Shaanxi normal growth, but also demonstrated the Americas species or hybrid species typical botanical characteristics. Mature leaf size between 149.3-355.3cm 2 ; the mature branches Festival length 5.5 -1 5.5cm between the section between the roughness of 0.4-0.9 cm between; between ear size 18.6 -1 64.2cm 2 between average spike weight in 15.5 , -2 13.8 g; fruit grain size between 1.32-4.56cm2, average weight is between 0.8-4.4g; juice yield of 61.8-70.2%. Plants strong potential Catawba, Concord and gold rose, Rose Lu Kang Baier weaker. Their germination rate; branches result percentage in the range of 54.5-91.4% 64.6-86.2%; sticks per the results of spikes of 1.4 -2 .1; average yield per plant 63.4 The between-5350.0g. The Concord sprouting rate, results sticks percentage, the sticks per the results of higher spikes of gold rose an average of the highest yield per plant, reached 5350.0g. Introducing juice grape varieties to powdery mildew, anthracnose and downy mildew are showing strong resistance. Resistance to powdery mildew, Concord, Rose Lu and Kang Baier reach the level of high resistance, Catawba and gold rose in disease resistance level; anthracnose resistance, disease resistance level introduced species reached; on downy mildew resistance, in addition to Rose Syrup is highly resistant to other introduced species are manifested as disease resistance. Introduction juice grape varieties light compensation point in of 23.9-42.2μmol · m -2 · s -1 ; light saturation point in 1575.0 -1, 642.9μmol · m -2 · s -1 between; CO2 compensation point in of 65.1-74.3μmol · mol -1 between; CO2 saturation point at 897.5 -1 061.7μmol · mol -1 . Compared with the Catawba and Concord, gold rose net photosynthetic rate, apparent quantum yield, carboxylation efficiency and RuBP regeneration rate was higher, showing strong photosynthetic capacity, which with its two consecutive years are given The higher yield consistent.
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