Effect of Shading and Spraying Potassium on Growth *And Yield of Cucumber Mohannad Cultivar

Abstract

The experiment was carried out in the field of Horticulture and landscape Dept., College of Agriculture, University of Diyala during the summer season 2015, to study the effect of the shading and potassium spraying agents on some vegetative growth parameters and yield of cucumber cultivar Mohannad. Shading levels were (% 0, % 35 and % 65) (L0, L1, L2) respectively. Four potassium levels were used (0, 4000, 4500 and 5000) mg k l-1 which were applied spraying at vegetative growth of plant which were symboled (K0, K1, K2 and K3) respectively. Results showed that shading at level 35% (L1) significantly exceeded on the dry weight of vegetative shoot, yield of the plant and the efficiency of water, while level 65% (L2) gave the highest increase in leaves area compared to 0% shading. The concentration of proline and potassium in plant leaves was higher in the control treatment without shade (L0). The results showed that fourth level of potassium (5000 mg k g-1) was superior compared to 0 level in leaves area, dry weight of vegetative shoot, yield of the plant, proline and potassium concentration in leaves and the water use efficiency increased in values (%19.79, %14.46, %72.59, %20.00, %37.63, and %72.75) respectively. The effect of the overlap between the levels of shading and potassium concentrations was significant in the dry weight of vegetative shoot, yield of the plant and the water use efficiency at the level of interference L1K3 (shading ratio of 35%, and the potassium concentration of 5000 mg k g-1) which recorded an average (79.67 g plant-1, 11.68 ton h-1, 17.27 kg mm h-1) respectively. The leaves area of the plant exceeded the level of interference L2*K3 with average (309.78cm2 ), while the level of interference L0K3 exceeded the rest of the levels of concentration of proline and Potassium concentration in leaves with average (2.37 mg g-1, and 44.99 mg k g-1).

Studying the Relationship Between some Spectral Evidence and the Nutritional Elements of Citrus Orchards in Baqubah

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Effect of Adding Chelated Zinc and Vermicompost on Some Indicators of Maize Growth

“…All parties [14,15] agree with this. As I also observed (18), zinc plays an important role in a wide variety of biochemical and physiological processes due to its involvement in several metabolic events involving proteins, carbohydrates, and auxins [16,17]. Increases in plant growth were observed after terrestrial Vermicompost was added to the soil around the yellow maize plants.…”

Effect of Shading Ratio, Benzyl Adenine and Organic Fertilizer ( Horti Boost 10) on the Content of Elements and some Chemical Compounds of Myrtle Plants (Myrtus communis L.)

“…The plants, especially the vegetable plants, may make them unable to continue growing, multiplying, and building and this is what is happening in the conditions of Iraq. Therefore, it was necessary to search for means that lead to overcoming the problems of extreme height in shading, and one of these means is to choose the ratios of Adequate shading that contribute to reducing the impact of solar radiation [6] . Phytohormones are the most important endogenous substances for moderating physiological and molecular responses, a critical requirement for plant survival, Phytohormones act at their site of synthesis or elsewhere in plants following their transport [7][8][9].…”