Long-term effects of burn-pruning on lowbush blueberry (<i>Vaccinium</i> <i>angustifolium</i> Ait.) production

Penney, B. G.; McRae, K. B.; Rayment, A. F.

doi:10.4141/p96-075

Cited by 16 publications

(20 citation statements)

References 8 publications

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“…In North America, periodic pruning of lowbush blueberry plants is widely practiced in managed blueberry production (Penney et al, 1997). Pruning stimulates plant productivity and decreases plant diseases and insects.…”

Section: Abundance Of Vegetation Depending On Experimental Sitementioning

confidence: 99%

Lowbush blueberry plantation age influences natural biodiversity on an abandoned extracted peatland

Tasa

Starast

Jõgar

et al. 2015

Ecological Engineering

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Section: Abundance Of Vegetation Depending On Experimental Sitementioning

confidence: 99%

Lowbush blueberry plantation age influences natural biodiversity on an abandoned extracted peatland

Tasa

Starast

Jõgar

et al. 2015

Ecological Engineering

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“…The greatest production is from the first crop following pruning (Black 1963;Penney et al 1997). Without weed control and supplemental fertilizer, production from the second crop is about half of the first crop and third-crop production is similar to that from unpruned blueberry plants (Penney et al 1997).…”

mentioning

confidence: 99%

Second-crop N fertilization improves lowbush blueberry (Vaccinium angustifolium Ait.) production

Penney¹,

McRae²,

Bishop³

2003

Can. J. Plant Sci.

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. 2003. Second-crop N fertilization improves lowbush blueberry (Vaccinium angustifolium Ait.) production. Can. J. Plant Sci. 83: 149-155. Most commercial blueberry growers follow a 2-yr pruning cycle because second-crop yield in a 3-yr cycle is usually too low for an economical harvest. Research was conducted to determine the extent to which second-crop production could be increased by applying fertilizer in the second-crop year. Treatments, consisting of factorial combinations of N (0, 60 kg ha -1 ), P (0, 26 kg ha -1 ), and K (0, 50 kg ha -1 ), were studied over two 3-yr burn-pruning cycles on a natural lowbush blueberry stand. Treatments were applied prior to, or shortly after, flower buds started to swell in the spring of the second-crop year. Nitrogen increased ripe fruit yield by 65% (3410 vs. 2070 kg ha -1 ) when compared with plots not previously fertilized with N, and by 43% (3410 vs. 2380 kg ha -1 ) when compared with plots previously fertilized with N. These results indicate that N might make the second crop economical to harvest. Phosphorus did not significantly affect yield, but K applied in combination with N in the second-crop year negatively affected production and Mg uptake. The increase in yield by N was due to more ripe berries resulting from a higher total (ripe + unripe) number of berries and hastened maturity that increased the percentage of ripe fruit. Reduced fruit abortion is suspected to be the reason for higher berry numbers. In contrast, the negative response to K applications with N was due to reduced total berry numbers. La majorité des producteurs commerciaux de bleuets taillent les arbustes aux deux ans, parce que, sur un cycle triennal, la production est habituellement trop faible pour être rentable la deuxième année. Les auteurs ont effectué des recherches pour déterminer dans quelle mesure l'application d'un engrais la deuxième année augmenterait la production. Les amendements consistaient en un mélange factoriel de N (0 et 60 kg par hectare), de P (0 et 26 kg par hectare) et de K (0 et 50 kg par hectare) et ont été étudiés pendant deux cycles triennal de brûlis-élagage, sur un peuplement naturel de bleuets nains. Les traitements ont été appliqués avant le gonflement des bourgeons floraux au printemps de la deuxième année, ou peu après. L'azote augmente le rendement en fruits mûrs de 65 % (3 410 kg par hectare contre 2 070), comparativement aux parcelles qui n'avaient jamais reçu d'engrais azoté, et de 43 % (3 410 kg par hectare contre 2 380), comparativement à celles bonifiées antérieurement. Ces résultats indiquent que l'azote pourrait rentabiliser la récolte la deuxième année. Le phosphore ne modifie pas le rendement de manière sensible, mais le potassium a une incidence néfaste sur la production et l'absorption de magnésium, quand il accompagne l'azote la deuxième année. L'accroissement du rendement résul-tant de l'amendement azoté s'explique par la plus grande proportion de baies mûres récoltées (sur le total de fruits mûrs et verts) et par la plus grande précocité, qui a ...

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“…47825?N;long. 53814?W; altitude, 133 m above sea level) that determined the effects of burn-pruning on blueberry production and the soil surface organic layer (Penney et al 1997). The site is an exposed ridge that is typical of the better blueberry growing areas in eastern Newfoundland.…”

Section: Methodsmentioning

confidence: 99%

“…The survival and long-term persistence of these species was probably due to their rhizomes or other perennating parts being deep enough in the soil [K. angustifolia, L. groenlandicum (Flinn and Wein 1977)] to avoid or minimize fire damage. Another reason may be burn-pruning being conducted when the soil was wet or frozen (Penney et al 1997) which would also minimize potential damage to these organs. Although a decline in L. groenlandicum and D. spicata after fire has been reported by Vogl (1964) and Swan (1970), respectively, the effect of burning on O.…”

Section: Species That Did Not Change Significantly Over Periodsmentioning

confidence: 99%

Effect of long-term burn-pruning on the flora in a lowbush blueberry (Vaccinium angustifolium Ait.) stand

Penney¹,

McRae²,

Rayment³

2008

Can. J. Plant Sci.

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. 2008. Effect of long-term burn-pruning on the flora in a lowbush blueberry (Vaccinium angustifolium Ait.) stand. Can. J. Plant Sci. 88: 351Á362. The effect of burn-pruning on the flora in a natural stand of lowbush blueberry was studied over a 24-yr period in Newfoundland and Labrador, Canada. Treatments were: not burned and burn-pruned every 2nd, 3rd, or 4th year. A vegetative survey was conducted before burning and periodically in succeeding years. Following statistical analyses, species were grouped according to their response to burning, as follows: those not significantly affected; those eliminated or whose frequency of occurrence was reduced; and those whose occurrence was increased. Initially, burning virtually eliminated Juniperus communis var. depressa, Empetrum nigrum, Cladina rangiferina, Lycopodium clavatum and Pleurozium schreberi, reduced the frequency of occurrence of nine species by 6 to 69%, and increased 13 others by 1 to 2050%. With burning, Polytrichum commune and Fragaria virginiana ssp. glauca, in particular, increased very early in the study to become two of the most prevalent species. Also, except for some initial effects of burning, the lowbush blueberry and some initially prevalent species (Festuca filiformis, Maianthemum canadense, Danthonia spicata, Cornus canadensis and Luzula multiflora var. acadiensis) remained among the most dominant species. Of the species studied, only seven each of those increased or decreased by burning were affected by the burnpruning cycle. In both groups, the greatest increases or decreases in the frequency of occurrence were obtained with the 2-yr burn-pruning cycle. Ils ont groupe´les espe`ces comme suit, selon leur re´action au traitement en recourant a`des me´thodes d'analyse statistique : plantes peu touche´es; plantes supprime´es ou moins abondantes; plantes plus abondantes. Au de´part, les bruˆlis ont virtuellement e´limine´Juniperus communis var. depressa, Empetrum nigrum, Cladina rangiferina, Lycopodium clavatum et Pleurozium schreberi, diminue´la fre´quence de neuf autres espe`ces de 6 a`69 % et accru l'abondance de 13 autres de 1 a`2 050 %. Apre`s les bruˆlis, Polytrichum commune et Fragaria virginiana ssp. glauca ont vu leur population augmenter tre`s rapidement au de´but de l'e´tude pour devenir deux des espe`ces les plus courantes. Outre certains effets initiaux attribuables aux bruˆlis, le bleuet nain et quelques espe`ces de´ja`abondantes (Festuca filiformis, Maianthemum canadense, Danthonia spicata, Cornus canadensis et Luzula multiflora var. acadiensis) ont continue´de figurer parmi les espe`ces dominantes. Sur les espe`ces examine´es, sept seulement des groupes dont les bruˆlis accroissaient ou re´duisaient la population ont e´te´affecte´es par le cycle d'e´lagage et de bruˆlis. Dans ces deux groupes, la plus forte hausse ou baisse d'abondance se produit avec le cycle d'e´lagage-bruˆlis de deux ans.

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Long-term effects of burn-pruning on lowbush blueberry (Vaccinium angustifolium Ait.) production

Cited by 16 publications

References 8 publications

Lowbush blueberry plantation age influences natural biodiversity on an abandoned extracted peatland

Lowbush blueberry plantation age influences natural biodiversity on an abandoned extracted peatland

Second-crop N fertilization improves lowbush blueberry (Vaccinium angustifolium Ait.) production

Effect of long-term burn-pruning on the flora in a lowbush blueberry (Vaccinium angustifolium Ait.) stand

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