The effect of nitrogen concentration in the fertilization solution on the growth parameters of seedlings in cellular trays and tomato (Lycopersicon esculentum) productivity | Efectul concentratiei de azot in solutia de fertilizare asupra parametrilor de crestere a rasadului in palete celulare si productivitatea tomatelor (Lycopersicon esculentun)
2010
Rosca, V., Universitatea Agrara de Stat din Moldova, Chisinau (Republic of Moldova)
Investigations were carried out at The State Agrarian University of Moldova to optimize the nitrogen content in the fertilization solution used in the production of tomato seedlings, injected in cellular trays. Fertilization solutions with different rates of nitrogen were studied: 50; 100; 200; 300 and 400 mg/l. Initial average had the following content of nutrient elements: N-50, P2O5-70, K20-120, Mg-50, Fe-14, Cu-6, Mn-1,8; Zn-0,5; B-0,5; Mo-0,3 mg/l. The investigation showed that the increased nitrogen level in the fertilization solution can effect growth and development of tomato plants at the nursery stage. High nitrogen level caused an increase of plant height and leaf area and a reduction of dry matter content in shoots. The seedlings grown on high rates of nitrogen fertilization (300, 400 mg/L) were succulent, had a weak resistance to dry weather and sun radiation, which led to a low rate of plant survival after transplanting in the open field. High concentrations of nitrogen applied in seedling production negatively affected early tomato yields, but no significant effect on total harvestred yield was observed.
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