Evaluation of Fertilizer Value of Biochars Using Water Plants

Abstract

To develop biochar for soil conditioner using water plants, characteristics of nutrients release of biochars were investigated under different water plants, manufg. times and manufg. temps. Under different water plants for manufg. biochar, the concns. of T-N and P2O5 in the water with biochars were higher in the order of Carex dimorpholepis (CRXDM) > Zizania latifolia (ZIZLA) > Phragmites australis (PHRCO) > Typha orientalis (TYHOR) > Miscanthus sacchariflorus (MISSA). The concns. of K2O in the water were in the order of TYHOR CRXDM > ZIZLA > PHRCO > MISSA. Under different manufg. times for biochar, the concns. of T-N, P2O5 and K2O in the water with biochars were higher in the order of 2 h > 30 min 1 h. The concns. of T-N, P2O5 and K2O in the water with biochars were on the order of 350°C > 500°C > 600°C under different manufg. temps. Total amts. of T-N and K2O releases in the water with biochars were higher in the order of CRXDM > ZIZLA > PHRCO > TYHOR > MISSA. Using biochars by water plants, total amts. of P2O5 releases in the water with biochars were on the order of CRXDM > ZIZLA > MISSA > PHRCO > TYHOR. The results of this study suggest that biochars by water plants can supply some of the nutrient requirements of crops and can be a valuable fertilizer. [on SciFinder(R)]