Abstract:

The comparative experiment on the application rates of soil decontaminant (Ⅰ) was performed to determine its disease control effect and influence on the yield of grapes after it was applied in the vinery. The results showed that the yield of grapes at the application rate of 450-900 kg/hm2 plus 45% compound fertilizer at 750 kg/hm2 increased by 20.7%-28.6% in comparison with that under CK without the application of soil decontaminant (Ⅰ), together with the increased economic returns 19.8%-28.6% and the significant control effect on powdery mildew，anthracnose and downy mildew. Under the four application rates of soil decontaminant (Ⅰ), the damage rates of powdery mildew，anthracnose and downy mildew reduced respectively by 73.7%, 78.9%, 78.9%, and 78.9% compared with CK without the application of soil decontaminant (Ⅰ). The results also showed that, an optimum combination of grape yield, economic returns and disease control effect could be obtained at 750 kg/hm2 application rate of soil decontaminant (Ⅰ).