No abstract

This study was carried out at the Experimental Farm and in the Laboratories of Horticulture Departments, Faculty of Agriculture at Moshtohor, Benha Univ., during 2018/2019 and 2019/2020 seasons. The aim of this study was to investigate the possibility of improving growth, seeds yield, oil productivity and fixed oil constituents of chia (Salvia hispanica L.) plants by some safety growth stimulants treatments i.e. chitosan, ascobien, humic and glutamic acids and micronutrients zinc (Zn) i.e., control (tap water), 100 and 200 ppm, as well as their combinations. Plants were sprayed with safety growth stimulants gave the significantly highest mean values for all studied characteristics i.e., plant height, number of branches per plant, plant fresh and dry weights, seeds yield/plant, weight of 1000 seeds, chlorophyll a, b, carotenoids, N, P, K, total carbohydrates, fixed oil percentage, and fatty acids determination of chia (Salvia hispanica L.) plants, with superior for humic acid at 5 ml/l followed by glutamic acid at 200 ppm in the first and second seasons. Meanwhile, ascobien at 200 ppm ranked the third values in this concern. Irrespective of control plants the lowest values of these parameters were scored by chitosan at 5 g/l in the 1 st and 2 nd seasons. As for zinc concentration treatments, there was appositive relationship between the values of abovementioned parameters and zinc concentration, hence as the concentration of zinc increased the values of these parameters increased till reached the highest increases at the highest concentration (200 ppm) in the two seasons. Furthermore, the combination of humic acid at 5ml/l showed to be the most effective one for inducing the highest values of these parameters especially those sprayed with the highest concentration of zinc (200 ppm). Chromatography analysis of chia fixed oil revealed the identification of seven components. The main component was α-linolenic acid (37.28 to 39.72%). The major components were α-linolenic acid, linoleic acid, oleic acid and palmitic acid. It can be concluded that humic acid at 5 m/l with Zn at 200 ppm was the best treatment for improving growth, seeds yield, fixed oil productivity, chemical constituents and fixed oil components of chia (Salvia hispanica L.) plant.

The present study was conducted during ( 2017-2018 and 2018-2019) seasons, at the Hort. Dept., Fac., of . Agric., Benha Univ., Egypt to study the effect of chemical fertilizers (NPK) as a full dose and biofertilization (Bio.) consisting of a mixture of (Nitrobein + Phosphorein) in the presence of Salicylic acid ( SA) foliar spray at 150 ppm in a single or combinations inbetween them on vegetative growth ,grain yield ,chemical constituents parameters and oil productivity of coriander plants comparison with control plants in both seasons. The results indicated that different treatments of NPK mineral fertilizer, biofertilization and salicylic acid treatments , either alone or mixed among them, resulted in a significant increase in the growth ,chemical constituents parameters and oil productivity in both seasons. The use of 100% NPK achieved the highest results in the characteristics of growth, yield and chemical composition, followed by the use of the treatment of 75%NPK +Bio.+SA, where it achieved a significant maximize in this concern,whereas the treatment of 75% NPK + Bio. ranked the third in this context as compared with untreated plants in both seasons. Also, the combined treatment of 75% NPK + Bio. + SA gave the highest values of oil productivity. Consequently, in order to achieve the highest values of growth and chemical constituents ,it is preferable to treate coriander with NPK at 100% or 75%NPK + Bio. + SA. Also, it is possible to treat coriander plant with 75% dose NPK +Bio. + SA to improve oil productivity.

Different media and explant types, anti-oxidant pre-treatments, additives, cytokinin types &concentrations as well as medium strength, GA3 concentrations, auxin types &concentrations were studied to find out the best protocol of in vitro propagation of Paulownia tomentosa. The results indicated that culturing of pre-treated shoot tips with anti-oxidant solution on modified Murashige&Skoog medium supplemented with PVP and activated charcoal as anti-oxidants, as well as adenine sulphate and coconut milk as additives maximized survival percentage and improved explant development. Also, using of 2mg/ L BAP increased proliferation. Addition of 1.0 mg/ L GA3 to half strength medium maximized shoot length. Moreover, addition of 1.0 IBA to the culture medium encouraged the highest shoot length and number of roots.

This study was undertaken during two successive seasons (2012/2013 & 2013/2014) to evaluate the effect of GA 3 foliar sprays at (0.0, 50, 100 and 150 ppm.) and chemical fertilization NPK at aratio of 1:1:2 namely (0.0, 2, 4 and 6 g / plant) as well as their combination on the growth, flowering, corm production and chemical composition of Gladiolus grandiflorus cv. White Prosperity plant. Obtained results showed that all tested GA 3 concentrations and NPK chemical fertilizers treatments as well as their combination increased vegetative growth parameters i.e., leaf length, leaf area, number and fresh weight of leaves / plant as compared with control in the two seasons. Moreover, the longest spike and flowering portion as well as the highest number of florets / spike were scored by GA3 at 150 ppm combined with chemical fertilizer at 6 g / plant in the two seasons. The thickest spike and the heaviest fresh spike were recorded by GA3 at 100 ppm enriched with chemical fertilizer at 6 g / plant, while the thickest lower floret was gained by the combined treatment between GA3 at 50 ppm and chemical fertilizer at 6 g / plant in the two seasons. Moreover, GA3 at 50 ppm supported with chemical fertilizer at 6 g / plant produced the thickest corm and the heaviest fresh corm in the two seasons. Whereas, the highest number of cormels and the heaviest fresh cormels / plant were recorded by 100 ppm GA3-sprayed plants , fertilized with chemical fertilizer at 6 g / plant in the two seasons. Also, all tested combinations between GA3 and NPK chemical fertilizer significantly increased leaf N, P, K and total carbohydrates content, particularly using the combinations between GA 3 at 150 or 100 ppm and NPK chemical fertilizer at 4 or 6 g/plant in both seasons. Conclusively, treating Gladiolus grandiflorus cv. White Prosperity plants with GA3 at 150 or 100 ppm combined with NPK chemical fertilizer at 4 or 6 g/plant showed the best vegetative, corm production and flowering characteristics with high quality.