Research on the optimal ratio of improved electrolytic manganese residue substrate about growth effects.

Electrolytic manganese slag (EMR) is a solid waste generated in the manganese hydrometallurgy process. It not only takes up significant land space but also contains Mn, which can lead to environmental contamination. There is a need for research on the treatment and utilization of EMR.

[Effects of Pomace Biochar on Yield and Quality of Chinese Cabbage and Soil Properties].

In order to explore the effect of pomace biochar on the yield and quality of Chinese cabbage and soil properties and realize the resource utilization of pomace, a pot experiment was conducted to study the effect of pomace biochar on the yield and quality of Chinese cabbage and soil properties by setting five biochar application rates of 0 % (CK), 1 % (T1), 3 % (T2), 5 % (T3), and 7 % (T4). The results showed that:① The application of pomace biochar could significantly improve the yield and quality of Chinese cabbage, and the effect was the best at a 5 % biochar application rate. The yield, soluble solids, soluble sugar, vitamin C, total nitrogen, total phosphorus, and total potassium content of Chinese cabbage increased by 71.