Effects of Combined Application of Solid Pyrolysis Products and Digestate on Selected Soil Properties of Arenosol and Plant Growth and Composition in Laboratory Experiments

Biochars as soil amendments have been reported to improve properties and may an important role in the mitigation of consequences climate change. As a novel approach, this study examines whether biochar digestate co-application can be utilized cost-effective, renewable plant nutrients. The effects two types biochar—wood chip (WBC) animal bone (ABC), applied alone or combination with anaerobic digestate—on physicochemical properties, on levels selected elements, growth yields ryegrass were studied laboratory experiments. Most parameters significantly affected by treatments, investigated factors (biochar type, application rate, presence digestate), well their interactions, found significant characteristics investigated. easily soluble phosphorus content (AL-P2O5) increased all WBC ABC caused further increase AL-P2O5 case digestate-supplemented treatment (ABCxAD). pH both also ABCxAD treatments. Similar increases salt detected ABC-treated samples treatments at higher rates. water holding capacity carbon soil. Phytotoxic biochars not detected, although doses resulted slower germination. Combined biochar–digestate applications compared sole Thus, combinations appear applicable organo-mineral fertilizers.