Effect of nitrogen fertilization and supplementary irrigation on growth, productivity and fruit quality of barrani c.v grapevine under Matrouh governorate condition, Egypt [electronic resource].

Includes references.

This study was carried out during two successive seasons (2008 and 2009)on the Barrani grapevine (Vitis Vinifera L.) grown under rainfall conditions of the western coastal zone Matrouh Governorate - Egypt to study the effect of nitrogen fertilization and supplementary irrigation on growth and productivity of "Barranii" cultivar grapevine. The obtained results indicated that, supplemental irrigation increased bud burst and fruit shoots percentage, vegetative growth, number of cluster /vine, cluster weight and yield (kg)/vine and fruit quality except TSS & sugars content that reduced as compared with the control, 100L water/vine gave the highest values in both seasons. Moreover, leaf N and potassium content were increased significantly but supplementary irrigation had no significant effect on leaf phosphorus content were. On the other hand, nitrogen fertilization rates(as a percentage from recommendations) increased growth parameters, yield and fruit quality except TSS & sugars content that reduced in both seasons, while 75% N/vine gave the highest values in both seasons. Moreover, it was found that there was no significant difference between treatments concerning TSS, total sugars and acidity in both seasons. Interaction between nitrogen fertilization and supplemental irrigation indicated that all vegetative growth parameters yield / vine and fruit physical properties were improved, while TSS% and sugar percentage were reduced in both studied seasons.

Summary in Arabic.

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