Effects of different level of leaf removal applications on mineral substance of raisins in organic Sultani Çekirdeksiz grape growing
1 Manisa Viticulture Research Institute Manisa, Turkey
2 Ege University, Faculty of Agriculture, Department of Animal Science, İzmir, Turkey
3 Ege University, Faculty of Agriculture, Department of Horticulture, İzmir, Turkey
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311.595 hectares of organic grapes are grown, which constitutes 4.6 percent of the world's grape growing area.Turkey is a major producer country of grapes growing in the world. Viticulture is one of the major branches of agriculture with respect to production area and its largest are of income in Turkish national economy. Since 1985, Turkey producing and exporting organic raisins, is a world leader in the production of raisins.
8418 hectares grape are grown organically which constitutes 1.8% of the total grape production area of Turkey.
The research was carried out in Alaşehir-Yeşilyurt Enterprise of Manisa Viticulture Research Institute in West Turkey from 2006 to 2007. In this study, effect of four different level of leaf removal applications at two periods on mineral substance of raisins at Sultani Çekirdeksiz grape variety growing organic conditions were investigated.
Experiment design were planed randomized block trial design with three replicates consisting of 12 vines per parcel were established. Mineral substance analyses of the raisins obtained from the applications were performed using the ICP-AES technique.
It was found that there was highest average potassium (K), iron (Fe) and Zinc (Zn) contents of the raisin in removing two leaves at berry set time down to the clusters; highest average magnesium (Mg) and copper (Cu) contents of the raisin in removing two leaves down to the clusters and removing two leaves up to the clusters at verasion time; highest average phosphorus (P) contents of the raisin in no leaf removal; highest average sodium (Na) contents of the raisin in removing three leaves at the berry set time and removing three leaves at verasion time down and up to the clusters at 5% significant level.
© The Authors, published by EDP Sciences 2016
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0/).