Effect of Method and Date of Pruning on Soil Organic Matter and Leaf Nutrient Concentrations of Lowbush Blueberries

Hanson, Eric J.; Ismail, Amr A.; Struchtemeyer, R. A.

doi:10.4141/cjps82-121

Cited by 5 publications

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“…Furthermore, there was no significant difference in the depth of the surface organic layer or the total carbon content of the surface 5 cm of soil between the unburned check and the average value across burning cycles, nor among burning cycles in 1986. Although these results support the findings of some (Hanson et al 1982), and contradict those of others (Trevett 1956;Smith and Hilton 1971;Trevett 1972), such factors as length of study, type of fuel and climatic conditions should be considered when making comparisons. A short-term (pruned once) study by Hanson et al (1982) in Maine determined that oil burning did not significantly For personal use only.…”

Section: Resultssupporting

confidence: 46%

“…This practice stimulates the growth of new stems from dormant buds on the rhizomes and increases yield (Hall 1955). While burn-pruning increases short-term yield, there is a concern that it reduces the surface organic layer where most of the rhizomes are located and that it would cause production to decline and blueberry fields to be destroyed (Trevett 1956;Black 1963;Kender et al 1964;Smith and Hilton 1971;Hanson et al 1982).…”

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confidence: 99%

“…Trevett (1956) in Maine and Smith and Hilton (1971) in Ontario showed that burn-pruning could be detrimental to the surface organic layer, while Hanson et al (1982) in Maine showed that it did not significantly affect total and readily oxidized organic matter. Also, yield and plant stand were not reduced by burn-pruning in a 9-yr study in Prince Edward Island (Black 1963) and a 12-yr study in Maine (Kender et al 1964).…”

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confidence: 99%

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

Penney¹,

McRae²,

Rayment³

1997

Can. J. Plant Sci.

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. 1997. Long-term effects of burn-pruning on lowbush blueberry (Vaccinium angustifolium Ait.) production. Can. J. Plant Sci. 77: 421-425. Burning is a pruning technique used to improve productivity of lowbush blueberry fields. Growers, however, are concerned that continuing and frequent burning might reduce production and eventually destroy blueberry fields. To assess the effect of long-term spring burn-pruning on blueberry production and the surface organic layer, 2-, 3-and 4-yr burning cycles were studied for 24 yr on a previously unfertilized natural stand of lowbush blueberry. Mean annual yield (averaged over burn and crop years) decreased with increases in the interval between burning due to decreased production in the second and third crop years following burning. Yield in the third crop year was similar to that from the unburned check plots. There was no significant yield decrease between the first 12 yr (period 1) and the second 12 yr (period 2) of production for the 2-yr cycle, but there were declines for the 3-and 4-yr cycles due mainly to lower yields in the second crop. Lower second-crop yields in the second period was attributed to damage by the blueberry leaftier (Croesia curvalana Kft.). Mean annual ripe fruit yields for the 2-, 3-and 4-yr cycles and unburned check were 473, 458, 335 and 109 kg ha -1 , respectively, in period 1 and 478, 340, 277 and 38 kg ha -1 , respectively, in period 2. Burning did not decrease the depth of the surface organic layer. Les producteurs s'inquiètent cependant de ce que des brûlages répétés et fréquents pourraient réduire la production des bleuetières, voire même entraîner leur destruction. Pour évaluer les effets à long terme de la taille par brûlage au printemps sur la production des bleuets et sur la couche organique du sol, nous avons étudié pendant 24 ans des cycles de brûlage biennaux, triennaux et quadriennaux sur une bleuetière naturelle auparavant non fertilisée. Le rendement annuel moyen (année de brûlage et année de production confondues) diminuait à mesure qu'on prolongeait l'intervalle entre les brûlages, en raison de la chute des rendements observés dans les deuxième et troisième années après le brûlage. Dans la troisième année de production, le rendement était descendu au même niveau que celui des parcelles témoins sans brûlage. Dans le cycle de deux ans, on ne notait pas de baisses significatives de rendement entre les 12 premières (période 1) et les 12 dernières années (période 2), mais il y en avaient dans les cycles de 3 et 4 ans, surtout à cause du rendement moindre dans la deuxième année de production. Ces chutes étaient attribuées à la lieuse de l'airelle, (Croesia curvalana Kft.). Le rendement annuel moyen en fruits mûrs dans les cycles de brûlage de 2, 3 et 4 ans et dans les parcelles témoins non brûlées étai, respectivement, de 473, 458, 335 et 109 kg ha -1 dans la période 1 et de 478, 340, 277 et 38 kg ha -1 dans la période 2. Le brûlage ne diminuait pas la profondeur de la couche organique superficielle du sol.

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Section: Resultssupporting

confidence: 46%

mentioning

confidence: 99%

mentioning

confidence: 99%

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

Penney¹,

McRae²,

Rayment³

1997

Can. J. Plant Sci.

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“…Leaf Ca concentration was lower than that reported by Bouchard and Gagnon (1987). Leaf Ca concentration may be diluted by greater foliar growth associated with fertilizer applications (Ismail et al 1981;Hanson et al 1982). In the Bouchard and Gagnon study (1987) pruning was done by burning, whereas in the current study, mechanical mowing was used.…”

Section: Resultsmentioning

confidence: 86%

“…Burning the plants leaves Ca-rich ash on the ground, increasing the amount of Ca available for uptake by new shoots (Smith and Hilton 1971). Ismail et al (1981) reported that pruning method had no influence on leaf nutrient concentrations whereas Hanson et al (1982) observed an increase of leaf N and P concentration and a decrease of leaf Ca concentration with burning compared with mowing method. Unlike Ca, leaf Mg concentration was comparable to that reported by Bouchard and Gagnon (1987) despite the different pruning techniques used as reported by Ismail et al (1981) and Hanson et al (1982).…”

Section: Resultsmentioning

confidence: 99%

Optimum leaf nutrient concentrations of wild lowbush blueberry in Quebec

Lafond¹

2009

Can. J. Plant Sci.

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To evaluate the nutritional status of wild lowbush blueberry (Vaccinium angustifolium Ait.), optimum leaf nutrient concentrations were developed in earlier studies conducted in Canada's Maritime Provinces and in Maine. However, these concentrations have not been validated under the climatic and edaphic conditions of the Saguenay-Lac-Saint-Jean region of Quebec (Canada). These concentrations may not be necessarily correlated with the high productivity levels recorded in this region in recent years. The objective of the study was therefore to determine the minimum and maximum blueberry leaf nutrient concentrations under the conditions characterizing this region. These concentrations were derived using the boundary-line approach, which involves estimating the relationship between maximum fruit yield and leaf concentrations of N, P, K, Ca and Mg. The data were obtained from N and P fertilization trials carried out between 2001 and 2006 in eight blueberry fields in the Saguenay-Lac-Saint-Jean region. On average, more than 80% of the samples analyzed met the minimum leaf nutrient concentrations. Minimum leaf N and Mg concentrations were comparable to those obtained in earlier studies. Minimum leaf concentrations were revised downward for P and Ca. Only minimum K concentration was higher compared with published standards. Maximum leaf concentrations were revised downward for all nutrients. Minimum and maximum concentrations were 16.36–20.55, 1.19–1.66, 5.40–7.10, 2.93–3.88 and 1.34–1.81 mg g-1 for N, P, K, Ca and Mg respectively. These concentrations were used to establish sufficiency ranges suited to wild lowbush blueberry growing conditions in the Saguenay-Lac-Saint-Jean region. Key words: Vaccinium augustifolium Ait., nutritional standards, yield-nutrients relationship

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Boundary-Line Approach to Determine Minimum and Maximum Leaf Micronutrient Concentrations in Wild Lowbush Blueberry in Quebec, Canada

Lafond

2013

International Journal of Fruit Science

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Minimum and maximum leaf micronutrient concentrations in wild lowbush blueberry ( Vaccinium angustifolium Ait.) were determined under the climatic and edaphic conditions of the Saguenay-Lac-Saint-Jean region (Quebec, Canada). The boundary-line approach was used to determine the relationship between leaf micronutrient concentrations and yield. The data were obtained from nitrogen and phosphorus fertilization trials conducted from 2001 to 2008 on 13 commercial lowbush blueberry fields in the Saguenay-Lac-Saint-Jean region. On average, more than 80% of the samples met the new minimum leaf micronutrient concentrations. Minimum leaf concentrations were revised downward for aluminum (Al), copper (Cu), iron (Fe), and zinc (Zn) compared to actual reference values. Minimum leaf boron (B) and manganese (Mn) concentrations were revised upward. Maximum leaf concentrations for all micronutrients were also revised downward. Minimum and maximum leaf concentrations were 26.2-73.5, 32.2-52.9, 3.2-6.5, 27.8-61.4, 873-1394, and 11.0-17.3 mg kg −1 for Al, B, Cu, Fe, Mn, and Zn, respectively. The determination of these new minimum and maximum leaf micronutrient concentrations established sufficiency ranges for the growing conditions in the region.

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Effect of Method and Date of Pruning on Soil Organic Matter and Leaf Nutrient Concentrations of Lowbush Blueberries

Abstract: Lowbush blueberry (vac.iniunt angustifolium Ait.) plants were pruned mechanically by flail mowing, or thermally by oil burning in the spring or fall. The prunlng treatments had no effect on soil organic matter or pH. Leaf

Cited by 5 publications

References 3 publications

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

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

Optimum leaf nutrient concentrations of wild lowbush blueberry in Quebec

Boundary-Line Approach to Determine Minimum and Maximum Leaf Micronutrient Concentrations in Wild Lowbush Blueberry in Quebec, Canada

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