Influence of Pentakeep-V on the nutrient interaction and availability for tomato production

A field pot experiment was implemented in the Faculty of Food and Agriculture Farm in Al-Ain area, Abu Dhabi, United Arab Emirates, located in Lat. 24 N and Long. 56 E with 302 m altitude during 2007/2008 over four months growing season. The experiment was done to evaluate fertilizer use efficiency, nutrient uptake, and yield of tomato (Solanum lycopersicum) as affected by Pentakeep-V. The experimental design was a split-split plot design with application method as main plot (Foliar application (AM1), Soil application (AM2), and Application rate (0.01%(L1), 0.02% (L2), 0.04% (L3)) and time interval as sub plots (One week (W1), two weeks (W2), and three weeks (W3)).A control treatment with zero level (0.00%, L0) of Pentakeep-V was included for comparison. Results showed all Pentakeep-V foliar treatments showed a significantly (P 0.05) higher tomato fruit in terms of yield and quality as compared to the control treatment with a percent maximum yield of 146%of the control treatment. The average yield for the most soil application showed less production compared to control except L1W2 and L1W3 that showed 107.9 and 117.7% respectively. Also results showed a significant negative tendency for the nutrient availability under soil application treatment compared to the foliar especially in case of phosphorus and micronutrient. L3W1 Foliar application treatment showed the highest significant increase in yield and macro and micro nutrient concentration and uptake for the fruit, stem and roots by using atomic absorption spectrophotometer.