الفهرس 
Introduction
Accelerating factorsOnly 14 pages are availabe for public view
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Abstract
This study aimed to : It is well known that the use of compost in agricultural production is associated with many benefits. These benefits include physical improvement of the soil and improvement of its biological and chemical status. The composting process is primarily concerned with the creation of a suitable environment in which aerobic microorganisms which are responsible for the breakdown of organic matter can be optimally active. The environmental-friendly, non-hazardous management and ultimate disposal of wastes is of great concern. Currently, researchers have focused their attention on natural and sustainable techniques through bioremediation, i.e., biological based treatment for wastes, and production of some benefit substances e.g., reducing sugars and organic acids. Therefore, experiments was conducted on bioconversion of rice and faba bean straw combined with rock phosphate into valuable compost through four main steps; Fifteen fungal isolates, which showed the highest cellulolytic activity on agar plates were selected . Cellulase production was quantitatively determined for the 15-fungal isolates on the broth medium, the activity of cellulose of isolate Penicillium sp., Trichoderma sp, and isolate Aspergillus sp., were higher than those of the other isolates, the three fungal isolates also showed strong sporulation suggesting that these three isolates, which have appreciable cellulolytic activity, are valuable in the bioconversion process of cellulolytic materials. Effect of compost addition on lettuce plant: The highest nitrogen g/kg (4.13) phosphorus g/kg (0.467)and potassium g/kg (3.76) percentages as well as highest values of dry weight(35.27 g/plant) and diameter(71.33 cm) of lettuce were obtained when application of 100 % compost fertilizer alone after 10, 20 and 30 days from sowing. The application of 75 % mineral nitrogen + 25 % compost fertilizer ranked after application of 100 % compost fertilizer with little differences. Application of 50 % mineral nitrogen + 50 % compost fertilizer ranked after previously mentioned treatment followed by application of 25 % mineral nitrogen + 75 % compost fertilizer after 10, 20 and 30 days from sowing. The lowest nitrogen g/kg (3.60), phosphorus g/kg (0.353) and potassium g/kg (3.36) percentages as well as lowest values of dry weight(9.27 g/plant) and diameter(19.60 cm) of lettuce were resulted from application 100 % mineral nitrogen alone after 10, 20 and 30 days from transplanting. Effect of compost addition on nitrogenase activity in rhizosphere of lettuce plant : Application of 50 % mineral nitrogen + 50 % compost fertilizer had the highest records of N2-ase activity(400.78) after 10 days from transplanting than other studied treatments. N2-ase activity (μmole C2H4 100 g-1 day-1) was decreased and registered the lowest value at application of 50 % mineral nitrogen + 50 % compost fertilizer after 30 days(24.96). High records of N2-ase activity(337.76),( 240.65),( 400.78)and (240.65) were observed as a result of early time (10 days from sowing) of application 100 % mineral, 25 % mineral + 75 % compost, 50 % mineral + 50 % compost and 75 % mineral + 25 % compost fertilizer. Effect of compost addition on Total microbial counts:The obtained results revealed that application 100 % compost gave the highest values of total bacterial count, total fungal count and Azotobacter count. On the other hand, control treatment gave the lowest records of the total microbial counts. Increasing compost percentage in combined fertilization treatments increased the total count of bacteria, fungi, phosphate dissolving fungi, cellulolytic fungi and Azotobacter, hence higher records were observed by application of 100 % compost treatment. The lowest values of microbial counts were recorded in control treatment at the three stages of growth.