Abstract:

The variation of the soil nutrients in ginseng under forest at different growth stage was studied by the method of agro-chemical analysis to reveal its states of soil nutrients requirement. The results showed that the content of total K in the soil of the root zone and contrast were the highest at leaf extending stage, their contents were 88.78g/kg and 100.34g/kg; the highest content of organic matte, total N and available K at flowering stage, the contents of nutrients were 53.14 g/kg, 52.89 g/kg, 5.48 mg/kg, 6.31 mg/kg, 16.53 g/kg, 19.08 g/kg, 146.29 mg/kg, 194.71 mg/kg; the lowest content of total N, total P, total K and available N at red fruit stage, the contents of nutrient were 4.35 g/kg, 4.62 g/kg, 0.47 g/kg, 0.55 g/kg, 81.75 g/kg, 82.52 g/kg, 15.5 mg/kg, 15.03 mg/kg; the lowest content of organic matte at withered time, the lowest content of available P at green fruit stage and the lowest of pH value at red fruit stage. There was a correlation between the organic matter with the available N and total N of the soil in root zone, and the correlate coefficient were 0.72 and 0.762; there was a correlation between the total N with the total P and available N, the correlation coefficient achieves 0.766 and 0.765, and the correlation between the available K with the pH value. Through analysis, the results indicated that there were the regular changes of the demand for soil nutrients of forest ginseng.