الفهرس 
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Abstract
This work was carried out at a private farm in Sidi-Salem District, Kafrelsheikh Governorate during the two summer seasons of 2005 and 2006 on cantaloupe (Ananas F1 hybrid). The aim of this work was to study the effect of some N fertilizer sources (organic and inorganic), biostimulants (Microbein and/or seaweed extracts) and their combined interaction on vegetative growth, flowering, fruit yield, fruit quality and chemical analysis of leaves. The obtained results cleared that:
Applying the treatment of 50% organic + 50% mineral fertilizer resulted in the most vigorous vegetative growth, the earliest flowering and the highest early and total yield, fruit quality and chlorophyll as well as N, P and K contents followed by 25% organic + 75% mineral fertilizer treatment while, the treatment of 100% organic manure (compost) gave the lowest values of these parameters in both seasons.
The combination treatment of Microbein plus seaweed extracts (Algifert) produced the best vegetative growth characters, the earliest flowering and the highest early and total yield, fruit quality and chlorophyll and nutrients contents. In contrast, the lowest records of these parameters were obtained from the control treatment without biostimulants in both seasons.
The combined interaction between 50% organic + 50% mineral as N fertilizer source and Microbein plus seaweed extracts as biostimulants gave the best vegetative growth characters at all tested sampling dates, the earliest flowering and the highest early and total yield and fruit quality as well as crop value and net income/fed. followed by 25% organic + 75% mineral fertilizer with both biostimulants while, the lowest values were achieved by 100% organic manure (compost) without biostimulants in both seasons.
Thus, it can be concluded that the combined interaction between 50% organic + 50% mineral N fertilizer and Microbein plus seaweed extracts (Algifert) was the most profitable treatment for producing cantaloupe plants under Kafrelsheikh conditions and similar areas.