Entity

Time filter

Source Type


Susaj E.,Fan S. Noli University of Korce | Susaj L.,Agricultural University of Tirana | Voci F.,Agricultural University of Tirana | Brahimi F.,Agricultural University of Tirana | And 4 more authors.
Journal of Food, Agriculture and Environment | Year: 2013

The study on the effects of cluster thinning of 'Kallmet' red wine grapevine cultivar was conducted during three consecutive years, 2010-2012, in Naraç, Mjedë, Shkodër, in the North-western part of Albania, in a 13-years old vineyard. The experimental plot was situated in an uniform hill with a sloping gradient of 5-6%, 32 m elevation, and a plantig density of 3030 vines ha-1 (2.2 m x 1.5 m). A randomized complete design (RCBD) with three replications and three variants (treatments) with a plot size of 10 vines for treatment in each replication was used. Three crop management practices were applied: Control (no cluster thinning), 25% cluster thinning (25% CT), and 50% cluster thinning (50% CT). Cluster thinning was applied at veraison, consisting on removing upper clusters on shoots. Leaf area per vine, number of clusters per vine, yield per plant, cluster weight, berry weight, soluble solids content, titratable acidity, pH of must and wine, alcohol fraction for volume, wine color intensity, total phenolics content, total anthocyanins content and free individual anthocyanins content, were recorded for a 3-year period. The data showed that two different cluster thinning treatments accelerated grape ripening by 6 and 12 days, reduced grape production per plant by 13.3% and 29.7%, raised cluster weight by 16% and 41.6%, and raised berry weight by 8% and 20.6%. There was a significant raise of soluble solids content in must by 1 and 1.4°Brix, while titratable acidity was reduced by 0.2 and 0.6 g L-1. Higher color intensity, higher alcohol content per volume, lower acidity and higher total and individual anthocyanins content were found in the wines produced from cluster thinning treatments. Cluster thinning significantly increased the concentration of delphinidin-3-monoglucoside, cyanidin-3-monoglucoside and petunidin-3-monoglucoside, while the concentration of the most abundant individual anthocyanins, malvidin-3-monoglucoside, did not differ significantly between treatments. The highest quality wine, considering alcohol content per volume, total phenolics content, total and individual anthocyanins content, was achieved by 50% CT, where leaf area per kg grape was 2.13 m2. Source


Susaj L.,Agricultural University of Tirana | Susaj E.,Agricultural Technology Transfer Center | Belegu M.,Agricultural University of Tirana | Mustafa S.,Agricultural University of Tirana | And 2 more authors.
Journal of Food, Agriculture and Environment | Year: 2013

The study was conducted in three consecutive years from 2009 to 2011 in Zagora, Malësia e Madhe, in the North-western part of Albania, in a 10- years old vineyard, planted with a local wine grape cultivar named Kallmet. The plot was situated in an uniform hill with a sloping gradient from 5% to 6% and a planting density of 3330 plants ha-1 (2.5 m × 1.2 m). A randomized complete block design (RCBD) with 4 replications and 6 treaments with a plot size of 60 m2 for treatment in each replication containing 20 grapevine plants. The weather was dry in the summer with a typical Mediterranean distribution of precipitation from autumn to spring, and no irrigation was conducted throughout the whole experimental period. Six crop management practices were applied: conventional (no intervention and cultivation), chemical control (glyphosate and diuron applications) and organic (cover crops and straw mulching). Yield of grapes per plant (YGP), berry must content (BMC), must sugar content (MSC) and must acidity content (MAC) were recorded for a 3-year period. The data showed that different soil management practices influenced the grape production per plant, and must and sugar content under the irrigated growing conditions. Compared to common conventional farmer practices, organic soil management practices and chemical control of weeds provided higher yield due to reduced competition of grapevine plant for soil water reserves, thanks to reduced number of weeds and improved soil physical properties. Organic mulching and mixed leguminous cover crops seem to be the most sustainable practices in terms of yearly production and nature preservation. Source

Discover hidden collaborations