EFFECT OF NITROGEN, ROOT STIMULATOR, AND GIBBERELLIC ACID ON A SPECIFIC CHARACTERISTICS OF PEACH SAPLINGS

Altotanje Joody

doi:10.36103/ijas.v50i3.699

Abstract

This study was aimed to evaluate the effect of nitrogen fertilizer, organic root stimulator and gibberellic acid on some growth characters of peach saplings cv. Red June for two consecutive seasons 2017-2018 at College of Agricultural Engineering Science, University of Baghdad. Different nitrogen (Urea 46%N) rates (0,50,75 gm) with three concentrations of organic stimulator (0,0.5,1 gm.L-1) and two rates of Ga3 (0,50 mg.L-1) were applied in a factorial scheme (3×3×2). Results revealed that the individual and interactive effect of applying nitrogen, root stimulator and GA3 significantly increased the studied characters, the interaction at N2D1G1 has improved the leaf dry weight (42.00%), shoot dry weight (61.33 %), Relative water content (RWC) (60.00%), N (2.68%), P (0.414%) and K (1.94 %) for season 2017, while the treatment N2D2G1 had the highest values at leaf dry weight (46.00 %), shoot dry weight (64.00%), RWC (74.00%) and leaf content of N (2.39%), P (0.56%), and K (1.99%) for season 2018.

Highlights

Peach (Prunus persica L.) is revered as a delicious and healthy summer fruit in most temperate climate regions of the world
Leaf dry weight were found using the formula×100, while N were measured according to Haynes(13) method, and P according to Olsen and Sommers (18), K leaf content were found using Haynes (13) method, and relative water content (RWC) according to Wu et al (22)
Leaf dry weight (%) Results in table(1) shows that the application of Nitrogen at 75 gm gave the highest value in both growth seasons (38.17, 40.89) respectively, as well as the Root stimulator at 0.5 gm.L-1 gave a significant value for season 2017 reached (37.06 %) while the concentration 1 gm.L-1 gave (41.89 %) in season 2018, GA3 gave significant values (34.41, 39.15 %) for the consecutive seasonal growth