Mineralization of Manure Nitrogen—Correlation with Laboratory Indexes

摘要: Simple and multiple correlations between available N estimated from a 10-month greenhouse trial with 10 manures number of potential laboratory indexes to are presented. The best single chemical index was the extracted by digestion pepsin. Slightly more than 80% variation in related variations pepsin N. High were found C released as CO₂ during incubations 1, 2, 4 weeks. In correlation using all plus 1-week incubations, significant incubation, incubation C/N ratio. indexes, factors 1- 10-week ratio, acid KMnO₄ solution. Pepsin release short period appear be useful indexes.