تأثير التسميد الحيوي و العضوي في نمو شتلات السندي Citrus grandis L. المطعمة على أصول مختلفة

الملخص EN

The study was carried out at citrus production nursay 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 genius of bacteria including Azospirillum brasilense, Azotobacter chroococcus , Bacillus subtilis and their interactions on some traits of vegetative growth.

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 biofertilizer treatment of Azospirillium and Bacillius with organic fertilization was significantly increased the height of seedling (54.20 cm).

In addition, Azospirillium, Azotobacter and Bacillius with organic fertilization was increased the bud diameter, number of branches, number of leaves, leaf area and shoot fresh and dry weights which were 0.735 cm, 8.23 branch/seedling, 80.68 leaf/seedling, 1598.4 cm/seedling, 89.70 g/seedling, 42.60 g/seedling respectively, compared with control treatment which gave the lowest values, while the results indicated that Fulcamaryana was superior in the height of seedling, increasing of buddiameter, increasing the number of branches, increasing the number of leaves and leaf area which were 39.47 cm, 0.562 cm, 4.74 branch/seedling, 60.45 leaf/seedling, 1328.4 cm/seedling respectively.

However, bitter orange was superior in shoot fresh and dry weights with 76.63 g and 32.23 g respectively.

The study was showed the superior of interaction treatment for grafting seedlings on Fulcamaryana treated with Azospirillium, Azotobacter and Bacillius with organic fertilization in increasing the bud diameter, the number of branches, the number of leaves and leaf area, whereas fresh and dry weights for total of vegetative were superior in interaction treatment of Pomelo seedlings that grafted with bitter orange and treated with Azospirillium, Azotobacter , Bacillius and organic fertilization.