الفهرس 
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Abstract
A pot experiment was conducted out door at the Experimental Farm, Faculty of Agriculture, Mansoura University during the summer seasons of 2015-2016 and 2016-2017 to evaluate the positive interaction effects among different types of organic fertilization forms (compost, FYM, and biochar) and levels (5 and 10 ton fed-1) alongside with bio fertilizer applications (Microbien, phosphorien, effective microorganisms (EM) and poultry manure extract ) on quantitative and qualitative yield characteristics of cucumber (Cucumis sativus) grown under an organic farming conditions .Split split plots design used with 3 replicates for each treatment. The experiment included 30 treatments: 3 treatments of organic farming fertilization compost , FYM and biochar ), two treatments of the rate from organic (5 and 10 ton fed-1 as sub plot) and 5 five treatments of bio fertilizers (control, microbien + phosphorien , microbien phosphosien+ EM , EM and poultry manure extract). It can be observed that compost fertilizer treatment caused a progressively. Increase in average fruit weight (g), fruit length (cm), No. of fruits pot-1 and total yield g pot-1 over than FYM during both seasons of experiment.It can be clear that the level of 10 ton fed-1 significantly produced the highest mean values of all parameters i.e. average fruit weight, fruit length, No. of fruits and total yield , respectively during the two growing seasons.It can be clear seen that all previously mentioned parameters are significantly increased under the combined bio fertilizer treatment) EM +M + ph) and the differences among its are high significant as compared with other treatments in both seasons. The highest averages of fruit weight (g), fruit length (cm), No. of fruits pot-1 and total yield pot-1 in first season and second seasons.The optimum treatment that produced the highest values of all yield components during the two successive seasons is the combined treatment of applying bio fertilizers EM +M + ph with 10 ton fed-1 from compost organic fertilizer.The organic fertilizer compost has the highest mean values of N, P and K content (%) and its uptakes in fruits and shoots in the two seasons, respectively. In return, the highest mean values of nitrogen content (%) in roots in both seasons respectively, are achieved under the organic treatment of biochar.The highest mean values of N, P and K and its uptakes in fruits and shoots, respectively in first and second seasons, are associated with the organic fertilizer level 10 ton fed-1. Meanwhile, the highest mean values of nitrogen content in roots are produced at the level of 5 ton fed-1, in the successive seasons, respectively.The highest values of N, P and K and its uptakes in fruits and shoots in the first and second seasons, respectively, are resulted from bio fertilizers treatment EM+M+ph. Furthermore, the highest mean values of N, P and K content and its uptakes of roots are achieved in the control treatment. The optimum treatment that produced the highest values of N, P and K content and its uptakes in fruits and shoots is the combined treatment of bio fertilizers EM+M+ph and 10 ton fed-1 from compost. Meanwhile, the highest values of N, P and K content and its uptakes in roots are obtained from the control treatment of bio fertilizers with applying 5 ton fed-1 from biochar.The compost organic fertilizer type has produced the maximum mean values of TSS and protein in both seasons. Meanwhile, the biochar treatment has the highest mean values of NO3-N in both seasons, respectively.The organic fertilizer level of 10 ton fed-1 results in increasing TSS and protein in both seasons, respectively. On other hand, the organic fertilizer level of 5 ton fed-1 has the highest mean values of NO3-N in first and second seasons, respectively.It could be concluded that the use of 10 ton fed-1 compost fertilizer with applying microbien + phosphorien + EM could enhance significantly the dry yield , Fruit yield , nutrient contents , nutrient up take and quality of cucumber plant under an organic farming system.