Agronomic benefits and detriments of using biochar

摘要

Effects on soil and crop 1.Generally positive, but very variable; need for biochar characterization 2.Better acidic and sandy soil; better for tropical conditions 3.Need for long term studies, need for information on management Effects on soil life 4.Variable but not negative Effects on the environment 5.Positive for GHG, but not for "nutrient biochar" 6.Questionable for HM and some organic compound Effects on the agro-systems 7.Biochar availability: only wood derived biochar? 8.Biochar does not exist: biocharS exist 9.Biochar acceptability (use of wastes, need for engineering energy production) 10.Longevity effects of biochar applications: almost unknown.