Impact of using chicken manure tea and ascorbic acid as substitutes for mineral N fertilizer on fruiting of superior grapevines

Abstract EN

During 2015 and 2016 seasons, Superior grapevines were fertilized with N (60 g N vine/ year) as 25 to 100% inorganic N with or without foliar application of chicken manure tea at 10 to 40% and ascorbic acid at 500 to 2000 ppm.

The target was elucidating the effect of using poultry manure tea and ascorbic acid as alternatives to chemical N fertilizer on fruiting of the vines.

Using N as 50 to 75% inorganic N plus spraying chicken manure tea at 10 to 20% and ascorbic acid at 500 to 1000 ppm was very effective in stimulating all growth aspects, berry setting %, yield and cluster weight and dimensions over the application of N via inorganic N alone at 25 to 100%.

leaf chemical constituents and quality parameters were obviously enhanced on the vines that received N as 25% inorganic plus spraying chicken manure tea at 40% and ascorbic acid at 2000 ppm For promoting the yield of Superior grapevines, it is suggested to use N as 50% inorganic N plus spraying chicken manure tea at 20% and ascorbic acid at 1000 ppm three times.

For improving quality of the berries , it is advised to use N as 25% inorganic N + spraying poultry manure tea at 40% and ascorbic acid at 2000 ppm three times.