Performance improvement of an American machine for grapevines grafting under Egyptian conditions [electronic resource].

Includes references.

Grafting of grapevines on different original rootstocks of grapevines is considered very important for cross and overcome some problems. The Bench machine of grafting fabricated in America was used for grapes grafting in the Horticultural Research Institute in 2003,. at Viticulture Research Department. To get the proper operational performance of bench machine grafting of grapevines. The studied variable included: Operational speeds of 188,201 and 214 m/s; Thickness values of grapevines of 0.5,0.'8, 1.0, 1.2, 1.4 cm and electric of energy consumption were 660, 1980, 3300 J. The optimum operational conditions of grafting machine was as follows: (1) The proper operational speed was 201 m/s, because of it had the highest cutting efficiency of grafting grapevines 90 % with good quality which had about 10-15 % of bark maintain and damage; (2) The time of grafting grapevines was distributed as 37.5, 37.5 and 25% for cutting time by hour, cutting time of bench machine and grafting by hand, respectively.; (3) The proper thickness of grapevines ranged between 0.5 to 1 em, because these ranges had the highest cutting efficiency of 85 to 95 % with the damage range of 5 t015 % which to be the lowest. (4) The operational time did not change exceed 8 seconds for the thickness values of 0.5 to 0.8 and 1 em. These operational times gave the highest efficiency values of grafting which were 95, 90 and 85 %, respectively, with less damage of 5, 10 and 15 % and (5) The proper electric of energy consumption was 1980 J at operation speed of 201 m/s which gave the maximum cutting efficiency of grapevines grafting (90%).

Summary in Arabic.

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