Effect of some organic, inorganic and biofertilization treatments on fruiting of early sweet grapevines

Abstract EN

During 2013, 2014 and 2015 seasons, early sweet grapevines received n as 100% mineral n or as 25% to 75% mineral n with 12.5 to 37.5 % plant compost and minia azotene biofertilizer.

the target was selecting the best ratio between different n sources.

using n as 50 to 75% mineral n besides 12.5 to 25% plant compost and minia azotene biofertilizer gave the best results with regard to growth and yield.

an obvious reduction on yield was observed with using n as 25% mineral n + 37.5% plant compost + 37.5 % minia azotene biofertilizer.

for improving yield of early sweet grapevines, it is suggested to use n as 50% mineral n plus 25% plant compost and 25% minia azotene, for promoting physical and chemical characteristics of the berries, it is recommended to use n as 25% mineral n + 37.5 % plant compost + 37.5 % minia azotene biofertilizer.