| In order to develop walnut industry and establish walnut bases in Shangzhou District, the statistical survey and analysis were conducted to investigate the effects of ecological factors, including temperature, moisture, topography, light and soil, on the growth of walnuts. The results showed that the quality and productivity of walnuts were closely related to the ecological factors such as temperature, moisture, topography, light and soil. The temperature and moisture conditions in Shangzhou district were more suitable for growth and development of walnut industry; the growth of walnuts varied greatly based on topography, with optimal results observed at an altitude between 720~1 100m, followed by 1 100~1 400m, the least favorable conditions at 1 400~1 700m; gentle slope with a gradient of less than 10° had the best growth results, whereas a steep slope with a 32o gradient resulted in the poorest results; Walnuts exhibit better growth on south or southeast slope compared to north or northwest slope; the bottom of the slope showed better growth results than the top; In terms of soil conditions, the outer edge of the crown had better light and growth results compared to inner part of the crown. The growth results of walnuts are the most favorable in sandy loam soil, followed by sandstone soil and yellow mud soil, and the least in stony soil. |
