الفهرس 
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Abstract
This study aimed to : The experiment was carried out in the Experimental Station and Laboratory of the Vegetable Crops and Ornamental Plants Depart., Faculty of Agriculture, Mansoura Univ., Egypt during two successive seasons of 2014 and 2015, to investigate the effect of different culture media and irrigation levels and their interactions on the vegetative growth and chemical composition of paspalum plant. The first culture medium (M1), it contains 50% sand +50% clay + zero % compost.
Second culture medium (M2), it contains 45% sand +45% clay +10% compost. In addition, irrigation amounts were used (3.750, 2.500, 1.250 l / pot /week). Irrigation amounts were divided into 3 equal batches, added to the soil three times a week as follows : The first batch was added on Saturdays, The second batch was added on Mondays ,The third batch added on Wednesdays. The plants grown in culture medium M4 containing 35% sand + 35% clay + 30% compost gave the heaviest values of the fresh weight of the cutting outputs (g/experimental unit) in both seasons. The plants irrigated with highest water level ( 3.750 l/pot/week) resulted the best fresh weight of the cutting outputs (g/experimental unit) in both seasons. The irrigation with lowest water level ( 1.250 l/pot/week) gave the maximum increase of the dry weight of the cutting outputs (g/experimental unit) in both seasons. The plants grown in culture medium M4 containing 35% sand + 35% clay + 30% compost produced the highest percentages of nitrogen, phosphorus and potassium in both seasons. The plants irrigated with highest water level (3.750 l/pot/week) achieved the highest percentage of nitrogen and potassium, while, plants irrigated with lowest water level (1.250 L/pot/week) gave the highest percentage of phosphorus in both seasons. The plants irrigated with moderate water level (2.500 l/pot/week) produced the highest content of total and (b) chlorophyll (mg/g fresh weight), while, the best results of chlorophyll (a) content were obtained with highest water level ( 3.750 l/pot/week) in the first season. The cultivated plants in the culture medium M3 containing 40% sand + 40% clay + 20% compost produced the highest content of carotenoids (mg/g fresh weight) in the second season. The plants grown in culture medium M3 containing 40% sand + 40% clay + 20% compost and irrigated with highest water level ( 3.750 l/pot/week) achieved the highest content of carotenoids (mg/g fresh weight) in the second season. Results shown in this search refers to the importance of organic matter in improving the grass growth and development. Medium included the highest compost content (35% clay, 35% sand and 30% compost) resulted in increasing vegetative growth and chemical composition of Paspalum vaginatum when irrigated with higher levels amounts of water. It could be recommended to use compost in adequate amounts in media prepared for planting paspalum grass to improre nutrients uptake and safe water which reflects on healthy growth and adorable colour.