BIOCHAR FOR SOIL REMEDIATION TO ENHANCE WHEAT NITROGEN ABSORPTION IN AN AGROTECHNOLOGY PARK

Biochar can significantly affect plant nutrient absorption. In this study, peanut shell, corn straw and rice straw were used as raw materials to prepare biochar, which was modified by graphene. The effects of different biochar and their modified biochar on wheat nitrogen absorption in an agrotechnology park soil were studied by pot experiments, to provide theoretical reference for soil improvement and straw resource utilization. The results showed that adding graphene to soil alone had no obvious effect on wheat nitrogen absorption (P > 0.05). All four biochar treatments had the most obvious effect on the nitrogen absorption of wheat at 5% modification, and the nitrogen absorption capacity of each part was grain > stem and leaf > glume > root system. The content of total nitrogen and nitrate nitrogen in the soil increased the most when 5% modified biochar was added, which increased by 46.5%-96.9%, 119%-128%, respectively. After 5% modified biochar was added, ammonium nitrogen in the soil was added.