Study the effect of pruning and adding humic acid on nitrogen and iron content of currant grapes (Vitis vinifera L.)‎

Abstract EN

The study was carried out in the grape orchard of the Agricultural Research Station in Erbil, northern Iraq, on a varaity on the Vinifera L.

Pedink grape plant raised in lunar breeding during the seasons 2017 and 2018.

To study nitrogen and iron concentration in the necks of the leaves, the experiment included a study the effect of leaving three levels of pruning (6, 8 and 10 e.

yes.

vine-1) and adding three levels of humic acid with concentrations (0, 4.5 and 9 g.

grape-1vine).

The results showed that pruning at the level of leaving 8 e.

yes.

vine-1 and adding 9 g grape.

vine-1 of humic acid gave the highest value in nitrogen concentration which amounted to 2, 180% and the lowest nitrogen concentration was at the level of leaving 10 eyes.

vine-1 and adding humic acid at a concentration of 4.5 g grape-1 1.803% , while the highest concentration of Iron achieved at the pruning level by leaving 10 eyes.

vine-1 and adding humic acid at a concentration of 4.5 g grape-1 (651, 183 mg.

kg-1) and the lowest iron concentration was at the trim level of 6 eyes.

vine-1 and without the addition of humic acid amounted to (386, 083 mg.

L-1).