Journal of Kerbala for Agricultural Sciences

 The study was conducted in Horticulture and Forest Unit at Al-Najaf Agriculture directorate during 2016-2017 growing season, to study the effect of adding some Bio and Organic fertilizer on yield and some quality parameters of strawberry (Fragaria x ananassa Duch) cultivated in plastic house.
 
     The first factor included two varieties of strawberry: Albion and Burtela while the second factor was adding seven treatments of organic and bio-fertilizer including: without adding fertilizer (control), adding Azotobecter chroococcum (10g.plant-1), adding of Bacillus subitls (10 ml. plant-1), spraying of organic fertilizer Appetizer (1 ml. plant -1), adding of A.chroococcum + B. subitls, adding A.chroococcum + spraying of Appetizer, adding B. subitls + spraying of Appetizer and adding of A.chroococcum + B. subitls with spraying of Appetizer. Factorial experiment using Randomized Complete Block Design ( R. C. B. D) with three replicates were used.The Duncans multiples range test at 0.05 probabilities was adopted to compare the treatments means.  
 
     The Bortila variety was significantly increased the fruits number to 27.08 fruit.   Plant -1, weight fruit rated to 25.05gm.fruit-1 and yield to 675.50 gm. Plant-1.The type of fertilizer showed a significant increase with adding A.chroococcum + B. subitls + Appetizer sprayed fruit number to 30.00 fruit.plant-1, and fruit weight rated 27.97gm.fruit-1 The Albion variety markedly increased total sugar to 10.54 mg.100gm fresh weight-1, while the Burtela variety showed significantly increase total acidity to 4.29mg.100g fresh weight-1and ascorbic acid to 33.73 mg.100gm fresh weight-1.
 
The fertilizer of A.chroococcum + B. subitls + Appetizer sprayed significantly increased total sugar to 12.11 mg.100gm fresh weight-1, while nitrate content reduces to 14.13mg.100gm dry weight-1. The treatment of A.chroococcum + Appetizer sprayed significantly increased Ascorbic acid to 55.47 mg.100gm fresh weight-1. The control treatment showed significant increase in total acidity 5.35 gm.100gm fresh weight-1 and nitrate content to 19.45 mg.100gm dry weights-1.

 The study was carried out at citrus production garden of the Ministry of Agriculture- General directorate of Horticulture and Forestry in the province of Karbala holy, Alhundia town between 1/03/ 2016 and 1/12/2016 on 6 months Pomelo seedlings grafted on two rootstocks of citrus including Fulcamaryana and Bitter orange to study the effect of rootstocks, organic fertilizer (Rice straw residues) and bio-fertilization by different species of bacteria including Azospirillum brasilense , Azotobacter chroococcus , Bacillus subtilis and their interactions on preparation and content of nutrients.  The experiment was carried out using Randomized Complete Block Design (RCBD) with two factors. This study included 32 treatments with 3 replicates for each treatment and each replicated with three seedlings where mean comparisons were performed using LSD test at 5% level of significance.
 
       The results  showed that treatment of Azospirillium, Azotobacter and Bacillius with organic fertilization was superior in leaves content of nitrogen, leaves content of phosphorus and phosphorus quantity in the soil which were  2.450%, 0.579% , 17.63 mg/kg respectively compared to control treatment which gave the lowest values.  Although the treatment of Azospirillium, and Bacillius with organic fertilization was superior in leaves content of potassium (1.54%), Azopirillum, Azotobacter with organic fertilization treatment was superior in soil content of nitrogen (11.08 mg/kg). In case of rootstocks, results showed that pomelo seedlings grafted on  Fulcamaryana had a highest level of leaves content of  phosphorus and potassium (0.492% and 1.34% respectively). While, pomelo seedlings grafted on Bitter orange was superior in phosphorus quantity in the soil 11.06 mg/kg-1. There was no significant differences between different  rootstocks in both leaves content of total nitrogen and nitrogen quantity in the soil.