A Study of Concentration of Nitrates and Nitrites in Cucumbers Produced in Greenhouses in Tartous Governorate and its Risk on Human health

This study addresses the issue of the danger of the high amount of Nitrates and Nitrites found in Cucumbers grown in greenhouses in the coastal region in Tartous - Syria, one hundred samples of greenhouse Cucumbers (in their green state) were collected at random from 50 Greenhouses in ten villages in Sahil Akkar in Tartous the villages are: (Arzona, Madihli, A. Zibdi, B. Shofan, Shas, Riyaf, Zahid, Dkaiki, Habroun and T. Sunoun) five Greenhouses were selected from each village, a special information card was prepared for each greenhouse which included the area of the greenhouse, the type of fertilizers used in it, and the source of water used to irrigate the house, the water was tested by a device known as Colorimeter, another device called Spectrophotometer was used to test the amount of Nitrates and Nitrites found in Cucumbers, the results show that the highest amount of Nitrates was in the samples taken from Riyaf 615.29 mg/kg, and the lowest amount in the samples from T.Sunoun 126.15 mg/kg, The Nitrites were at their highest also in Riyaf at 0.06 mg/kg and at their lowest in the samples of B, Shoufan at 0.023 mg/kg, the results also show variation in the Probability value (P=0.000) in the Cucumbers samples. When comparing the amounts reported by the World Health Organization (WHO) it was found that the amounts of Nitrates and Nitrites ranged between 100% in Riyaf, A. Zibdi and Madhli, followed by 90% in B.Shoufan, and 80% in Habroun and Dkaiki,and 60% in Arzona, Zahid, and Shas ,and 30% in T. Sunoun. The percentage of contamination in all the Greenhouses reached only 76%whole. the concentration of the Nitrites was within the standard level less than 1%mg/kg.

Effect of spraying the leaves with some humic compounds and amino acids on growth and productivity of cucumber in plastic green houses

The research was conducted in plastic green house for the 2013-2014, in Alqangerh village, about 5 Km from the city of latakia, in order to study the effect of spraying the leaves with some humic compounds and amino acids on growth and production of hybrids of cucumber (Novo,Dorruk). Spraying leaves with three organic fertilizers are (Huzone, Mol mixs), and two boats Dbalin and Amino vega (an amino acid). The results showed that all treatments of leaves spraying with organic fertilizer geve better resultus with significant differences than the control treatment in all the studied traits of both hybrids: (stem length, number of branches/plant, number of leaves/plant, leave area cm2, the number of flowers on the stem, number of fruits on the stem, number of floral branches, number of fruits on the branches).The treatment of spraying achieved with mixture of humic compounds and amino acids increase with significant differences in both the number of leaves/plant, number of branches/plant, the plant's stem length and number of fruit on the stem in the hybrid Novo. while the treatment of spraying achieved of hiozon increase with significant differences the number of branches/plant, the number flowers on the branches and number of fruits on the branches was in the hybrid Dorok. As for the early production and total production, the treatment of spraying with mixture of humic compounds and amino acids with significant differences on other transaction when both hybrids Novo and Dorruk amounted, respectivety (5 ، 4,1 kg/m2 ; 16 ، 14,8 kg/m2 ).

Evaluation Responses of Seeds Germination in Some Varieties of Cucumber (cucumis sativa) to Drought Stress

The study was conducted on six varieties of cucumber: Napleon, Ampres, Sendian, Prence, Samara and Baladi. To study the responses of these varieties to drought stress, on the seed germination and seedling growth under different Polyethylen glycol concentrations (0 control, 10 mM, 20 mM and 40 mM PEG). The results of this research showed a some varieties to its tolerance to drought stress. The varieties Ampres, Prence and samara showed more resistance to drought stress. It s indicated with increasing seed germination and growth of seedlings with the higher concentration of PEG in compared to another varieties.

Study the Effect of Grafting Cucumber Hybrids on Cucurbita Hybrid Rootstock on Growth, Yield Quantity and Quality

The investigation was conducted during 2013-2014 in Al-Moroj - Baniyas - Tartous. The effect of grafting cucumber (Hybrid Amir F1 and Potenza F1) on (TZ 148 F1) rootstock on growth and production was studied. The experiment contained 4 treatments (ungrafted Amir F1 and Potenza F1, and grafted ones on Cucurbita hybrid). The results showed that grafted cucumber (Amir F1) on (TZ 148 F1) was significantly superior to other treatments in leaf area (15368.79 cm2.plant-1) and total production (21.58 kg .m-2). Grafting cucumber (Potenza F1) on (TZ148 F1) leaded to a significant decrease in each of plant height (113.25 cm), number of secondary branches (7.5 branch . plant-1), number of female flowers (94.13 flower . plant-1), number of fruits (38.13 fruit . plant-1) and total production (14.61 kg .m-2). The earliness in grafted cucumber (Amir F1 and Potenza F1) on (TZ 148 F1) (0.19 and 0.28 kg .m-2 respectively) was significantly decreased compared to ungrafted plants (0.43 and 0.54 kg .m-2 respectively). Grafting on (TZ 148 F1) didn't affected the fruit qualitative characteristics.

Effect of Spraying with Organic Fertilizers on Flowering and Yield of Cultivars Cucumber Maximus F1

A field experiment was conducted in the open field during the autumn season in year 2015 to study the effect of spraying with two organic fertilizers (Crop + Extra, Cremalga) on flowering and yield parameters of cultivars cucumber Maximus F1.