Effect of Spraying with Conventional and Nano-NPK Fertilizer on the Growth and Chemical Content of Lettuce Plants Grown by Hydroponic Technique
Effect of Spraying with Conventional and Nano-NPK Fertilizer on the Growth and Chemical Content of Lettuce Plants Grown by Hydroponic Technique
Taiba F. Al-Mayyahi, Dhafer A. Jameel and Haider A. Alghanmi*
ABSTRACT
The current study was conducted during the winter season 2022-2023 in a hydroponic system in Al-Diwaniyah Governorate, Iraq, to investigate the impact of spraying with conventional and nano-NPK fertilizer on several vegetative Growing properties and composition of Lactuca sativa var. capitata L., the experiment included two fertilizer treatments, 2 and 4 g/l of conventional and nano-NPK fertilizer, in addition to an un-fertilized control group. The results showed significant superiority of Nano NPK 4g/l treatment in the characteristic of leaf number, vitamin K, phosphorus, sulfur and zinc with values of 28 leaves/plant, 149.77 mg/100 g fresh weight, 0.27%, 31.27 mg/g dry weight, 3 mg/100 g fresh weight respectively compared to plants treated with Nano NPK 2g/l and control group which gave the lowest values. Whereas, Nano NPK 2g/l treatment was significantly superior in wet weight, dry weight, leaf area, carbohydrates, vitamins A and C, potassium, iron, calcium and fiber with values of g 160, 11.5 g, 13150.05 cm2/plant, 1.49%, 204.32 mg/100 g fresh weight, 4.48 mg/100 g fresh weight, 1.3%, 2.35%, 57.4 mg/100 gm, 1.85% respectively compared to plants treated with Nano NPK 4g/l and control group which gave the lowest values. In addition, conventional NPK showed superiority in plant height, total chlorophyll, carotenoids, protein and nitrogen among all treatments with values reaching 27.33 cm, 4.61 mg/gm fresh weight, 0.21 mg/gm, 1.79% and 2.36%. Statistical analysis confirmed considerable variations were found between several tests at p ≤ 0.05.
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