Effect of Mineral Fertilization Rates and Method of Superphosphate Application on Some Growth and Fruits Indicators of the Grapevine Cultivar, Al-Helwani


Abstract in English

The research experiment was carried out during the 2007, 2008 and 2009, seasons on grape variety Al- Helawani (10 years old) to study the effect of N.P.K. fertilization rates and the triple superphosphate (T.S.P) application method on some fruits characters and growth indicators. Three fertilization N.P.K rates were used, rate 1 (75:25:50) kg/ ha, twofold and fourfold of rate 1, in three replicates in addition to control. The application of (T.S.P) was on soil surface and at 30 cm depth, the percent of leaf area, shoot length, the degree of berry colour, berry firmness were calculated. The results showed a significant increase of leaf area, shoot length and the Berry colour compared to control. The third rate was the best for increasing the leaf area and shoot length, while the first and second rates were increased the colour of Berry. At the same time, there was a gradual significant decrease in Berry firmness compared to control when the rate of fertilizer was increased. It was also noted a significant increase in leaf area (11%) and shoot length (4.5%) in deep T.S.P application compared to the surface application.

References used

Abou Nuqta F. (1995). Enviromental Impact of Fertilizeres Use in Syria Proc. seminar production and Use of chemical fertilizers and environment, Al Foully (red) NRC. Cairo. рр 35-50
Antep, S, (1997). Evaluation of some chemical method of soil nitrogen availability based on 15 nitrogen technique. Commun. Soil.Sci. plant. anal .Vol, 28 .PP. 537-550
Aroutunian, A. C. (1965). Vineyard fertilization. Kolos, Moscow. (In Russ). P. 462

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