Quantity and timing of needlefall in N and P fertilized loblolly pine stands

Needlefall quantity and timing were examined for 1.5 years on three loblolly pine ( Pinus taeda L.) stands from a nitrogen (N) and phosphorus (P) fertilization field study. Needlefall biomass increased following N fertilization on the two N-deficient stands. Needlefall biomass increased by as much a...

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Bibliographic Details
Published in:Forest ecology and management 1991-01, Vol.41 (3), p.205-219
Main Authors: Vose, James M., Lee Allen, H.
Format: Article
Language:English
Subjects:
ABONOS
Agronomy. Soil science and plant productions
AZOTE
Biological and medical sciences
CAIDA DE LAS HOJAS
CHUTE DES FEUILLES
ENGRAIS
FERTILIZERS
FOREST STANDS
FOSFORO
Fundamental and applied biological sciences. Psychology
General agronomy. Plant production
Generalities. Analysis and diagnosis methods
LEAF FALL
NITROGEN
NITROGENO
PEUPLEMENT FORESTIER
PHOSPHORE
PHOSPHORUS
PINUS TAEDA
RODALES
Soil-plant relationships. Soil fertility. Fertilization. Amendments
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Summary:Needlefall quantity and timing were examined for 1.5 years on three loblolly pine ( Pinus taeda L.) stands from a nitrogen (N) and phosphorus (P) fertilization field study. Needlefall biomass increased following N fertilization on the two N-deficient stands. Needlefall biomass increased by as much as 75% (from 2088 to 3660 kg ha −1 year −1) on one of these stands, but on average increases were about 30%. On a high N quality stand, there was no needlefall biomass response to N fertilization. Phosphorus had no effect on needlefall biomass in any of the three stands. Across all stands, needlefall biomass was unrelated to stocking (as measured by basal area), but significantly correlated ( r 2 = 0.53; P
ISSN:0378-1127
1872-7042
DOI:10.1016/0378-1127(91)90104-4