The effect of vitamin (C) and heat stress on fertility and hatchability of Japanese quail

This experiment was conducted at Kharabo farm, Faculty of Agriculture, University of Damascus. A total of 252 chicks of Japanese quail breeder females were distributed on the first day of life into two groups, Gicks in G1 were reared from 1-28 days of age under ideal required temperature according to their age, while chicks in G2, were subjected to heat stress from 8 am to 5 pm at 42 °C from the first day of hatching until 28 day of age and to the ideal required temperature from 5 pm until 8 am. Chicks of each group were distributed into three subgroups, with three replicates per subgroup.

Effect of Mineral Fertilization Rates and Method of Triple Superphosphate Application on Some Chemical Properties of Berry of the Grapevine Cultivar, Al-Helwani

The research experiment was carried out during the 2007, 2008 and 2009 seasons on grape variety Al- Helwani (10 years old) to study the effect of NPK fertilization rates and the triple superphosphate (T.S.P) application method on some fruits characters.Three fertilization NPK rates were used, rate 1 (75:25:50) kg/ ha, twofold and fourfold of rate 1, in three replicates in addition to control. The application of (T.S.P) was on soil surface and at 30 cm depth. The results showed significant increase of the total soluble solids (TSS), pH and vitamin C compared to control. while the content of TSS in juice increased by 40.9%, 44.6%, 50.3% in the three rates, respectively, compared to control, pH increased from 5.45 in control to 5.92; 5.89; 5.73 in the three rates, respectively, in turn, significant decrease in total acidity (TA) was noted by 15.3, 11.1 and 42.8%, in the three rates, respectively, compared to control. ASignificant increase of (TSS) by 2.5% and vitamin C by 10 % in deep T.S.P application compared to the surface application, on the other hand, (TA) decreased significantly by 4.2%, while, there was no significant differences in pH, in both treatments.