الفهرس 
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Abstract
SUMMARY
Production of vegetables via grafting plants in Egypt is still in the primary stage although, increasing propagation of cucurbits mainly watermelon through grafted transplants. Under the Egyptian conditions, so the higher cost of propagation of watermelon through grafting, the farmers resorted to grafting watermelon to face many problems may severely decline watermelon cultivation area. These problems varied between physiological phenomenon and soil born diseases. Many solutions were applied to face the mentioned problems i.e., soil fumigation, cultivate watermelon in virgin soil and propagation via grafting. The chemical pollution of soil and water and the rare of expose of virgin soil prove to increase the demand of grafted transplants for watermelon cultivation. Generally, grafting vegetables conceders as new practice in Egyptian cultivation and the nurseries produced grafted transplants are little and face more than one method of grafting e.g. splice, approach, hole insertion and side graft (Lee JM., 1994). As well as the multiplicity of rootstocks cultivar or hybrids belong genous Cucurbita maxima and Cucurbita moschata. The numerous of sources of rootstocks make it varied in the growth rate stem properties as thickness, internal buff and its ability for maintain the transplant in vertical portion.
The following represents a brief resume of the obtained results.
Effect of grafting methods and rootstocks on peacock wm60 watermelon
1- The original rootstocks were superior to the domestic one for enhancing rate of plant vegetative. Among the original rootstocks, it was obvious that rootstock 6001 exceeded Super Shintosa and Ferro rootstocks.
2- Vine length and number of lateral branches formed from the grafted plants were greater than those formed of the un-grafted plants, the longest plant, stem diameter and leaves number were found in the case of grafting on peacock wm60 cultivar with 6001 root stock by Splice grafting methods.
3- Leaf chlorophyll content of watermelon plants affected positively and significantly through grafting on the experimental rootstocks belonged pumpkins e.g. 6001.
4- The data proved to significant increase in leaves and plant content of the nutrients in plants grown from grafted transplants on all investigated rootstocks compared to non-grafted or self-grafted ones. Ferro rootstock recorded lesser values of N, P and K than those of Super Shintosa and 6001 rootstocks.
5- The highest fruits number and average fruit weight were recorded by the plants grown from grafted transplants on 6001, Super Shintosa and Ferro rootstocks.
6- Grafting produced higher number of fruits per plant.
Effect of grafting methods and rootstocks on Aswan watermelon
1- The longest plant, stem diameter and leaves number were found in the case of grafting on Aswan cultivar with Shintoza root stock by Splice grafting methods and Aswan cultivar with Ferro root stock by Splice grafting methods but the shortest one was found when no grafted or grafted on the rootstock of same cultivar by any types of grafting methods
2- The highest number of branches, chlorophyll and fresh weight leaves were found in the case of grafting on Aswan cultivar with Shintoza rootstock by Splice.
3- The big value of fresh weight of watermelon plant and dry weight were found in the case of grafting on Aswan cultivar with Shintoza root stock by Splice grafting methods and Aswan cultivar with Ferro root stock by Splice grafting methods but the low dry matter was found when no grafted or grafted on the rootstock of same cultivar by any types of grafting methods..
4- Nitrogen content in watermelon leaves had significant augment as use Aswan without grafted and Aswan grafted on Shintoza via Splice method, while , Pea cock Wm60 cultivar grafted on 6001 via Splice method shows high significant increment throw Potassium and Phosphor content in watermelon leaves. Nitrogen absorption affected through different rootstocks
5- Nitrogen content in watermelon plants had significant augment as use Aswan without grafted and Aswan grafted on Shintoza via Splice method, while , Pea cock Wm60 cultivar grafted on 6001 via Splice method shows high significant increment throw Potassium and Phosphor content in watermelon plants
6- Yield of plant and fruit number has more affected by grafting specially with Pea cock Wm60 via use grafting method (splice) compare to local rootstock or non-grafted plants
Propagation watermelon via grafting improved plant performance within enhancing vegetative growth, yield and fruit quality compared to non-grafting or direct seed propagation. Use rootstocks breaded for grafting e.g. 6001, Super shintoza and Ferro was superior to use none dedicate rootstocks as local pumpkin CV and self-scion. Grafting watermelon on the previous rootstocks via splice grafting method was better compare to tongue approach method.