Effect of Organic Fertilizers on Morpho-Physiological Traits of Grapevine (Vitis vinifera) in Some Vineyards of Zanjan Province

Document Type : Original Article


1 Department of Horticultural Science, School of Agriculture, Tehran University, Tehran, Iran.

2 Associate Professor of Soil and Water Research Department ,Zanjan Agriculture and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization (AREEO), Zanjan, Iran

3 Malayer university

4 Tehran university



I order to reduce the use of chemical fertilizers in the production process of fruit and increase the quality and yield the use of organic fertilizers is of great importance. The purpose of this study was to investigate the effect of a number of organic fertilizers on some morpho-physiological traits of grapes. The experiment included the application of organic fertilizers which were applied in a factorial randomized complete block design with three replications in three locations (garden) during two consecutive years. Animal manure (at three levels of 0 (control), 10 and 20 kg / ha), humic acid (at three levels of 0 (control), 5 and 10 kg) and folic acid (three levels of 0 (control), 5 and 10 kg) were the treatments. The results showed that the main effects and interaction effects of organic fertilizers were significant on all measured traits (18 trait) including fruit dry matter, sugar content, pH of fruit juice, leaf area index, berry weight, number of berries, berry size, cluster size, and cluster weight. According to the results, higher concentrations of all three organic fertilizers used in this study had higher positive effects on final yield and yield components, especially the number of inflorescences per cluster and the number of spikes.  Simultaneous application of 20 ton/ha animal manure, 10 kg/ha humic acid and 5 kg/ha folic acid is recommended as a desirable combination in vineyards. Due to the effects of location on measured traits under organic fertilizer treatments, it is necessary to investigate the stability of these results through standard methods and tests.