Effect of Wood Vinegar on Soil Nutrient Availability of Cinnamomum bodinieri Seedlings

The annual potted seedlings of Cinnamomum bodinieri were treated with wood vinegar solution of 0%, 1%, 2% and 5% respectively. The soil pH value, electrical conductivityvalue, organic matter content, effective potassium content, effective iron content, effective phosphorus content, NH₄⁺-N content and NO₃⁻-N content were detected every 7 days. the effect of wood vinegar on the nutrient availability of potted soil of C. bodinieri were analyzed.The results show that the soil nutrient availability could be affected by treatment of wood vinegar in the seedlings of potted plant, and the content of soil nutrients decreases rapidly or tend to stable after the treatment of 21 d. The soil pH value, EC value, NH₄⁺-N content, effective potassium content, NO₃⁻-N content and effective phosphorus content of soil treated with 1% concentration are significantly lower than those of control. Soil organic matter content and effective iron content are significantly higher than those of control. The content of organic matter, NH₄⁺-N content and effective iron content of soil treated with 2% concentration are significantly higher than those of control, and EC values are significantly lower than those of the control. The soil pH, NO₃⁻-N content, available potassium content and available phosphorus content are not significantly different from those of the control. The content of organic matter, NH₄⁺-N and available phosphorus in soil treated with 5% concentration are significantly higher than those of the control, while the content of NO₃⁻-N, the available iron and the available potassium are obviously lower than those of the control, and the difference of the pH and EC values of the soil is not obvious. Therefore, 2% concentration treatment has the best effect on improving the soil nutrient status of C. bodinieri seedlings, and it should be applied once per 21 d at the time of treatment.