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Titolo:
NUTRIENT STATUS AND GROWTH OF BLACK SPRUCE LAYERS AND PLANTED SEEDLINGS IN RESPONSE TO NUTRIENT ADDITION IN THE BOREAL FOREST OF QUEBEC
Autore:
PAQUIN R; MARGOLIS HA; DOUCET R;
Indirizzi:
MINIST RESSOURCES NAT QUEBEC,DIRECT RECH FORESTIERE,2700 RUE EINSTEINST FOY PQ G1P 3W8 CANADA UNIV LAVAL,FAC FORESTERIE & GEOMAT,CTR RECH BIOL FORESTIERE ST FOY PQG1K 7P4 CANADA
Titolo Testata:
Canadian journal of forest research (Print)
fascicolo: 5, volume: 28, anno: 1998,
pagine: 729 - 736
SICI:
0045-5067(1998)28:5<729:NSAGOB>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
SITE-SPECIFIC GROWTH; ONTARIO CLAY BELT; PICEA-MARIANA; DOUGLAS-FIR; SILVICULTURAL TREATMENTS; NITROGEN-FERTILIZATION; AMMONIUM-NITRATE; SOIL; PINE; NUTRITION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
39
Recensione:
Indirizzi per estratti:
Citazione:
R. Paquin et al., "NUTRIENT STATUS AND GROWTH OF BLACK SPRUCE LAYERS AND PLANTED SEEDLINGS IN RESPONSE TO NUTRIENT ADDITION IN THE BOREAL FOREST OF QUEBEC", Canadian journal of forest research (Print), 28(5), 1998, pp. 729-736

Abstract

The effect of nutrient addition (fertilization with N, P, and K at a rate of 448, 224, and 224 kg.ha(-1), respectively) on height growth, root biomass, leaf area, and foliar nutrient concentrations of slow-growing layers and newly planted seedlings of black spruce (Picea mariana(Mill. ) BSP) was evaluated on an apparently productive mesic site in Quebec. Annual height growth increment of fertilized layers was greater than 20 cm.year(-1) compared with 3-4 cm.year(-1) for the other three treatments. Fine root biomass (<2 mm in diameter) and leaf area growth were significantly higher for fertilized layers and seedlings compared with their respective controls. For both current and 1-year-old needles, foliar N concentration on a unit leaf area basis increased significantly for both layers and seedlings, and vector analysis showed that, in all cases, N was the most limiting nutrient. Five growing seasons after treatment, the only residual effect of fertilization on foliar nutrient concentrations was higher foliar N in fertilized seedlings. Thus, it appears that the slow growth of the unfertilized layers on this site was due to resource limitation rather than to the type of regeneration as such.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 21/09/20 alle ore 10:47:22