Biological and chemical reactivity and phosphorus forms of buffalo manure compost, vermicompost and their mixture with biochar.
This study characterized the carbon and phosphorus composition of buffalo manure, its compost and vermicompost and investigated if presence of bamboo biochar has an effect on their chemical and biological reactivity. The four substrates were characterized for chemical and biochemical composition and P forms. The biological stability of the four substrates and their mixtures were determined during an incubation experiment. Their chemical reactivity was analyzed after acid dichromate oxidation. Biological reactivity of these substrates was related to their soluble organic matter content, which decreased in the order buffalo manure>compost>vermicompost. Phosphorus was labile in all organic substrates and composting transformed organic P into plant available P. The presence of biochar led to a protection of organic matter against chemical oxidation and changed their susceptibility to biological degradation, suggesting that biochar could increase the carbon sequestration potential of compost, vermicompost and manure, when applied in mixture.
UMR 7618 BIOEMCO, UMR CNRS-Université Paris VI et XII-IRD AgroParisTech, Paris et Thiverval-Grignon, France; Institute of Environmental Technology, VAST, Hanoi, Viet Nam. Electronic address: tpngo@grignon.inra.fr.
Phuong-Thi
PT
Ngo
Cornelia
C
Rumpel
Quoc-Anh
QA
Ngo
Marie
M
Alexis
Gabriela
G
Velásquez Vargas
Maria de la Luz
Mde L
Mora Gil
Dinh-Kim
DK
Dang
Pascal
P
Jouquet
D000818:Animals; D031723:Bambusa / Q000737:chemistry; D002020:Buffaloes; D002244:Carbon / Q000032:analysis; D002606:Charcoal / Q000737:chemistry*; D008372:Manure / Q000032:analysis*; D009835:Oligochaeta / Q000378:metabolism*; D009930:Organic Chemicals; D010084:Oxidation-Reduction; D010758:Phosphorus / Q000737:chemistry*; D012987:Soil / Q000737:chemistry*
D008372:Manure; D009930:Organic Chemicals; D012987:Soil; C540010:biochar; D002606:Charcoal; D010758:Phosphorus; D002244:Carbon
Biochar; Compost; Phosphorus; SOM stability; Vermicompost