Abstract:

The eastern foothill region of Helan Mountain possesses unique geographical and favorable ecological conditions, making it a prime grape wine production area in China. The soil nutrient conditions are closely related to the quality of wine produced in this region. In this study, three grape vineyard plots were selected based on their plantation ages: less than 5 years, 5-10 years, and over 10 years. Variance and Pearson correlation were conducted to examine the relationships between soil chemical properties, nutrient status, and soil nutrient factors in vineyards of different plantation ages. The study revealed that the pH of the soil exhibited a decreasing trend when the plantation age was between 5 and 10 years. However, when the plantation age exceeded 10 years, the pH started to increase. In soils with vineyards aged between 5 and 10 years, the content of available phosphorus and rapidly available potassium showed significant fluctuations. However, these content levels began to recover when the vineyard age exceeded 10 years. The organic matter, alkali hydrolyzable nitrogen, total phosphorus, and total potassium contents in soil at different depths were only moderately influenced by vineyard age, with fluctuations within a certain range. Correlation analysis among nutrient factors revealed a significant decrease in correlations among these factors after the plantation age exceeded 10 years. These findings indicate that with increasing plantation age, both soil nutrient factors and the relationships between them undergo changes, which provided a basis and clues for improving soil nutrition and serves as a reference for the development of high-quality specialty industries and the adjustment of industrial structure in our region.

Key words: eastern foothill region of Helan Mountain, grape vineyard, soil, chemical property, nutrients trait, planting years