Quality peach produced in fertilizer doses of nitrogen and green pruning

Green pruning residues (GPRs) and leaves from 16 red and white Vitis vinifera L. cultivars from Piedmont (Italy) were studied. The investigated samples were extracted by ultrasound-assisted extraction optimized by an experimental design, and quali- and quantitatively analyzed by HPLC-PDA-MS/MS. GPRs and leaves show a similar polyphenolic pattern, with quercetin 3-O-glucuronide, caftaric acid, and quercetin 3-O-glucoside as the main components, although in variable proportions. The HPLC results were related to the antioxidant activity, measured as total phenolic content and through DPPH and ABTS assays with similar results. Colorimetric in vitro assays, offline combined with HPLC-PDA analysis, determine which compounds contribute to the antioxidant activity in terms of radical scavenging abilities. Valorization of GPRs is a potential source of natural compounds that could be of interest in the health field, increasing their economic value together with a positive effect on the environment.

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Effects of green pruning on growth of Pinus radiata

Canadian Journal of Forest Research ◽

10.1139/x03-131 ◽

2003 ◽

Vol 33 (11) ◽

pp. 2067-2073 ◽

Cited By ~ 14

Author(s):

W A Neilsen ◽

E A Pinkard

Keyword(s):

Pinus Radiata ◽

Growth Curves ◽

Tree Height ◽

Radiata Pine ◽

Stem Growth ◽

Term Study ◽

Diameter Increment ◽

Long Term Study ◽

Green Pruning

Pruning of plantation trees is completed to produce knot-free timber and veneer logs, thus increasing the value of the plantation. A long-term study (11 years) was established to investigate the effects of selective pruning on radiata pine (Pinus radiata D. Don) stem growth. The 175 stems selected for the experiment had been pruned to 2.4 m at 6 years of age. At ages 8 and 10, the trees were pruned to 45%, 60%, or 75% of tree height and growth was compared with a control (first lift pruned only). Pruning to 45% of tree height had no effect on growth to age 13 years. Responses to the other treatments were apparent soon after pruning and continued until measurements ceased at 17 years of age. Pruning to 60% or 75% of tree height at second lift reduced diameter increment, and increment decreased as pruning severity increased. There was a further separation of the growth curves following third-lift pruning to 60% or 75% of tree height. The results suggested that maintaining a live crown ratio of 55% would minimize effects of pruning on diameter growth. The effect of severe pruning on diameter increment was greater for subdominant trees than for dominant stems. Pruning had less effect on height than diameter increment, but all treatments involving pruning to 75% of height at third lift resulted in trees that were approximately 10% shorter than unpruned trees at 13 years of age. More severe second-lift pruning resulted in smaller diameter over stubs at the time of third-lift pruning. Second-lift pruning to 60% of total height produced acceptable diameter over stubs. Implications for management are discussed.

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Increased boron concentrations of Scots pine foliage induced by green pruning

Canadian Journal of Forest Research ◽

10.1139/x02-066 ◽

2002 ◽

Vol 32 (8) ◽

pp. 1434-1440

Author(s):

Heikki Nuorteva

Keyword(s):

Pinus Sylvestris ◽

Scots Pine ◽

Research Area ◽

Dead Branch ◽

The Mean ◽

Pruning Residues ◽

The Dead ◽

One Year ◽

Green Pruning

The responses of Scots pine (Pinus sylvestris L.) foliar boron (B) concentrations to artificial defoliation by green pruning were studied by examining sample trees for 3 years after the treatments. In winter, concentrations of boron in foliage were determined individually from needles on the lateral top shoots of 168 sample trees (at the beginning 28 m, at the end 410 m tall). To prevent the pruning residues from affecting the nutrition of the sample trees, all pruned branches were transported away from the research area. Before pruning, there were no differences in foliar B among the pruning classes. Reduction of the living crown by pruning (LCRP, % of the initial crown ratio) 50% or more increased the concentrations of foliar B drastically for 3 years. The increase was greatest in the largest trees with the highest LCRP (about 70%), where the mean concentrations of foliar B one year after pruning were nearly 180% higher than in the unpruned trees. Pruning of the dead branch whorls or only the few lowest living whorls did not affect the boron nutrition of the trees. In the current study, the ability of rapid and sufficiently large defoliation to increase B concentrations for several years in the Scots pine foliage was confirmed experimentally; earlier suggestions have been based on analyses made after defoliation. The potential suitability of green pruning is discussed as a method for improving the boron status of trees in boron-deficient areas.

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Physiological and growth responses related to pattern and severity of green pruning in young Eucalyptus globulus

Forest Ecology and Management ◽

10.1016/s0378-1127(03)00046-x ◽

2003 ◽

Vol 182 (1-3) ◽

pp. 231-245 ◽

Cited By ~ 45

Author(s):

E.A. Pinkard

Keyword(s):

Eucalyptus Globulus ◽

Growth Responses ◽

Green Pruning

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Modeling the effect of physiological responses to green pruning on net biomass production of Eucalyptus nitens

Tree Physiology ◽

10.1093/treephys/19.1.1 ◽

1999 ◽

Vol 19 (1) ◽

pp. 1-12 ◽

Cited By ~ 31

Author(s):

E. A. Pinkard ◽

M. Battaglia ◽

C. L. Beadle ◽

P. J. Sands

Keyword(s):

Biomass Production ◽

Physiological Responses ◽

Eucalyptus Nitens ◽

Green Pruning

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Quantitative assessment of fungal colonization in Norway spruce after green pruning

Forest Pathology ◽

10.1111/j.1439-0329.1997.tb00848.x ◽

1997 ◽

Vol 27 (1) ◽

pp. 1-11 ◽

Cited By ~ 21

Author(s):

B. Metzler

Keyword(s):

Norway Spruce ◽

Quantitative Assessment ◽

Fungal Colonization ◽

Green Pruning

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Season and technique of green pruning on physiological and sensorial aspects of Maciel peaches

Research Society and Development ◽

10.33448/rsd-v9i10.8575 ◽

2020 ◽

Vol 9 (10) ◽

pp. e7039108575

Author(s):

Marcelo Dotto ◽

Kelli Pirola ◽

Darcieli Aparecida Cassol ◽

Alexandre Luiz Alegretti ◽

Juliano Zanella ◽

...

Keyword(s):

Experimental Design ◽

Fruit Quality ◽

Experimental Unit ◽

Peach Tree ◽

Management Techniques ◽

Green Pruning

One of the aspects that should be considered regarding the fruit market is the quality. Appearance is considered an important factor as the color of the skin. One of the management techniques to improve the peach quality is green pruning. The objective of this study was to determine the season and the technique for green pruning. The study was carried out in a commercial orchard atDois Vizinhos city, Paraná State, Brazil. The experimental design was a completely randomized experimental with four replications and two trees by experimental unit. The techniques were first to remove vertical branches facing the center of the canopy and in the base of the tree with reference to broken and poorly ones and, the second the belding of these. The use of green pruning for Maciel peach tree in five to four weeks before harvesting, improved fruit quality.

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