| Several environmental factors including soil physicochemical property, temperature, relative humidity, sunshine duration and precipitation were researched in three vineyards of different altitudes in Yao county of Shaanxi province. Vine growth and development indices, such as phenophase, output factors, vine growth increment and grape diseases were investigated. Wine was made from the grapes in the three vineyards, and its ingredients and sensory quality also were analyzed and identified respectively. 1. The ecological characteristic in three vineyards of different test site The results indicated that the soil of the three vineyards were alkali. Soil OM and N, P, K were deficient, available microelements were plentiful except B. Soil nutrition of the lowest vineyard was richer than that of the other two vineyards. The vineyards of test site B and test site C have the longest and the shortest sunshine duration respectively. Precipitation of test site A and B was more plentiful than test site C, and on hillside it increased with altitude elevation, but the change regulation of air temperature and active accumulated temperature(=10℃)was contrary to that of the precipitation. It was not significantly different in air relative humidity between different test site vineyards. 2. The effect of local ecology of hilly country on vine growth and development Phenophase of test site A and B was later than test site C, vine growth increment decreased from test site C to A. The germinating power, fruitbearing shoot percentage, fruiting coefficient and fruit set percentage of test site C were better than those of the other two test site. 3. The effect of local ecology of hilly country on grape and wine quality Sugar content of grapes in test site B was the highest, but in test site A, it was the lowest. Acid content increased from test site C to A, but sugar acid ratio decreased. Tannins content of grapes in test site B was the highest and in test site C, it was the lowest. There was no difference in alcohol fermentation progress of different test site. The change regulation of wine alcohol, total acid and tannins content was consistent with grape quality in different test site. Concluded from chemical analysis and sensory identification, the grape and wine quality of hillside vineyard was apparently better than that of flat vineyard, and lower altitude on hillside was beneficial to the grape and wine quality. |
