الفهرس | Only 14 pages are availabe for public view |
Abstract Field experiment was carried out at Desert Research Center at Ras Suder, South Sinai Governorate, Egypt during 2010 and 2011 seasons, on tomato plants (Lycopersicon esculentum Mill) cv. Castlrock. This work aimed to determine the effects of magnetic treatments of both pre-sowing seeds and irrigation water and its relevance to NPK fertilizer requirements of tomato plants. The experimental design was split-split plot with three replicates. Irrigation treatments (magnetized and ordinary water) were arranged in the main plots, pre-sowing treatments (magnetized and untreated seeds) were distributed in the sup-plots and three NPK levels (50, 75 and100% of recommended rate) were assigned in the sub-sub plots. In general, the best results for plant and soil were obtained by magnetic field techniques either for presowing seeds or irrigation water. However, the incorporated treatment (plants originated from magnetically treated seeds and irrigated with magnetized water) tended to be more effective for enhancing the plant and soil characteristics during various plant stages. The interaction treatment of magnetically treated seed and irrigation water combined with 100% or 75% NPK fertilizer levels had a preference results, where it gave the highest values of vegetative growth characters, increased the N, P, K, Ca, Fe, Ec values and Na soil content but reduced S, Cl and pH value in both plant and soil solution, in addition to improving the activity of CAT and POD enzymes. Finally we emphasized that the techniques of magnetic field in agriculture fields could be a promising technique for agricultural improvements but extensive research is still required. |