الفهرس 
Effect of wheat cultivars:-
Effect of Bio-fertilizer:-Only 14 pages are availabe for public view
 |  | from | 92 |  |  |
| | | from | 92 | | |
Abstract
Two field experiments were conducted during the two successful winter seasons 2015/16 and 2016/17 in Agricultural Extension Field in Gharbiya governorate at Tanta City, To Study the effect of different fertilizer treatments of mineral and biological nitrogen fertilizers on yield and yield components as well as quality for three cultivars of wheat was the main objective of this study. A splitplot design in (RCBD) was used with three replications, where, the three wheat cultivars (Gemmeiza 11, Sids12 and Sakha 93) were plotted in the main plots and the six fertilizer combinations of nitrogen and bio fertilizers were arranged in the sub-plots. These Six fertilizer treatments were as follows: • Control treatment (zero units of mineral nitrogen with no seed inoculation with bio fertilizer). • Forty (40) mineral nitrogen units/fed + seed inoculation with bio fertilizer. • Fifty (50) mineral nitrogen units/fed + seed inoculation with bio fertilizer. • Sixty (60) mineral nitrogen units/fed + seed inoculation with bio fertilizer. • Seventy (70) mineral nitrogen units/fed + seed inoculation with bio fertilizer. • Recommended treatment 70 mineral nitrogen units/fed with no seed inoculation with bio fertilizer. Wheat seeds were inoculated with bio-fertilizer (S.W.E.R.Y.N) which is a mixture of two kinds of N2 fixing bacteria (Azospirillum brasilense and Azotobacter chroococcum). This bio-fertilizer was mixed well with wheat seeds in shade before sowing directly and then the irrigation process was performed. This bio-fertilizer was kindly obtained from Microbiology Dept., Soils, Water and Environment Research Institute, Agricultural Research Center (ARC), Giza, Egypt. The soil of the experimental sites were clay loam with pH 7.4 and 7.6 in texture soil samples which had been taken before sowing in the first and second seasons, respectively. The preceding crop was rice (Oryza sativa) crop in the first season 2015/16, while it was maize (Zea mays) in the second one 2016/17. Sub-plots area was 6 m2 (1/700 faddan), both experiments were sown on 25 November 2015 and 23 November 2016. The experimental area was well prepared. Phosphorus was added at the rate of 100 kg / fad. Super Phosphate (15.5% P2o)s before sowing and potassium sulphate (48% K2o) were applied at a single dose of 50 kg / fad. before sowing in both seasons. Nitrogen was added to the experimental plots based on each treatment in the form of urea (46% N) as follows:-first dose was1\5 (onefifth.) of the whole dose before the first (life) irrigation. The second dose was 2/5 (two-fifth) of the whole dose before the second irrigation .The third dose was 2/5 (two-fifth) of the whole dose before the third irrigation. The cultivation method was broadcasting method in each sub plot. Sowing irrigation was done at the day of broadcasting after sowing directly. Other irrigations were performed approximately at 25 days intervals. Weed control was done manually in the first 60 days of cultivation to avoid the adverse effects of herbicides on N2 fixing bacteria. The harvest was done manually on15-30 April in both seasons. Other recommended cultural practices for growing wheat were done as usual in the area.