The ratio test of the biochar as the vegetable seedling medium was added. The 2% and 4% waste mushroom biochar media were better in the cabbage seedlings, and the average value was better than the control group in the leaf size, stem diameter and fresh weight. In tomato seedlings, the addition of 4% and 6% of the waste mushroom biochar  performed better, and the average value was superior to the control group in leaf size, stem diameter and fresh weight.

Fig 1. Mushroom waste medium raw material and biochar finished product

Fig 2. Pear tree biochar application for cultivation test.

Fig 3. The 2%, 4% and 6% mushroom waste medium biochar was mixed in medium for plug seedling growing test.

Fig 4. The cultivation experiment of Chinese cabbage in pots was carried out by mixing soil with different sources of biochar materials.