الفهرس يوجد فقط 14 صفحة متاحة للعرض العام
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المستخلص
The aim of this study was to apply the modern applications of laser science and nanotechnology in plant foliar fertilization. To satisfy this object the field experiment was conducted on tomato plants, cultivated in clayey soil with furrow irrigation. Micronutrients were used as foliar fertilization in the form of nanoparticles[ (nano- oxides) (NPs)] by Sigma Aldrich Int. Co and compared its effect with control (untreated plants) and fractions from normal recommended of traditional forms (mineral salts) as (NPs at 10%RD, NPs at 25%RD, NPs at 50%RD, NPs at 75%RD and NPs at 100%RD). The studied parameters during this experiment were growth, yield, days to flowering, quality properties and soil characters after plant removal. Also some optical properties of tomato samples were studied by measuring laser reflection intensity. - The obtained results reveal that the tomato parts dry matter, yield of fruits, and some quality properties including pigment content (Chlorophyll and lycopene), total sugars and total soluble solids (TSS) greatly increased, in general with additions of micronutrients forms. During nanoparticle treatments, the most effective treatment was with the rate of half dose from minerals at recommended dose (NPs at 50%RD). Mineral forms in normal recommended dose (MNRD) gave nearly equal effect with NPs at 50%RD. The minimum number of days was accompanied with (NPs at 50%RD) followed by (MNRD). Evaluation of nutritional status of shoots, roots and fruits of cultivated tomato plants at flowering and reproduction stages, showed a positive action for foliar application of micronutrients especially with mineral fertilization at normal recommended dose (MNRD) and nanoparticles in the rate of half dose of mineral fertilization in normal recommended dose (NPs at 0.50RD)