Montagnini, F. Haines, B. Swank, W.
Factors controlling nitrification in soils of early successional and oak/hickory forest in the southern Appalachians - Amsterdam (Países Bajos): ELSEVIER, 1989 - 18 páginas: 6 tablas
Incluye referencias bibliográficas en las páginas 93-94
Factors regulating nitrification were examined in three forests of contrasting nitrifying activity in the southern Appalachians of North Carolina, U.S.A. NH4N availability was the main factor regulating nitrification in pine/mixed-hardwood and black locust (Robinia pseudo-acacia L.)-dominated early successional forests. Litter leachate solutions from black locust had high concentrations of N and other nutrients, but their influence upon nitrification as estimated in laboratory-amended soil incubations was relatively small.
In a mature oak/hickory forest, nitrification was not stimulated by NH4N amendments, nor by amendments of black-locust litter leachate solutions. Amendments with CaCO3 and CaCl2 stimulated ammonification but did not stimulate nitrification in the soils of this forest. Laboratory incubations of soils amended with oak/hickory live leaves, litter, and forest-floor extracts suggested a possible inhibitory action on nitrification from oak leaves. Low nitrification was also found in glucose-amended laboratory incubations of black-locust soils, suggesting that an increase of the C:N ratio of the soil following amendment with extracts could be responsible for low nitrification rates.
QUERCUS
CARYA
ROBINIA PSEUDOACACIA
FIJACION DEL NITROGENO
SUELO
COMPOSICION QUIMICA
EUA
Factors controlling nitrification in soils of early successional and oak/hickory forest in the southern Appalachians - Amsterdam (Países Bajos): ELSEVIER, 1989 - 18 páginas: 6 tablas
Incluye referencias bibliográficas en las páginas 93-94
Factors regulating nitrification were examined in three forests of contrasting nitrifying activity in the southern Appalachians of North Carolina, U.S.A. NH4N availability was the main factor regulating nitrification in pine/mixed-hardwood and black locust (Robinia pseudo-acacia L.)-dominated early successional forests. Litter leachate solutions from black locust had high concentrations of N and other nutrients, but their influence upon nitrification as estimated in laboratory-amended soil incubations was relatively small.
In a mature oak/hickory forest, nitrification was not stimulated by NH4N amendments, nor by amendments of black-locust litter leachate solutions. Amendments with CaCO3 and CaCl2 stimulated ammonification but did not stimulate nitrification in the soils of this forest. Laboratory incubations of soils amended with oak/hickory live leaves, litter, and forest-floor extracts suggested a possible inhibitory action on nitrification from oak leaves. Low nitrification was also found in glucose-amended laboratory incubations of black-locust soils, suggesting that an increase of the C:N ratio of the soil following amendment with extracts could be responsible for low nitrification rates.
QUERCUS
CARYA
ROBINIA PSEUDOACACIA
FIJACION DEL NITROGENO
SUELO
COMPOSICION QUIMICA
EUA