the impact of various nitrogen sources and levels on the quantitative and qualitative characteristics of parsley

Parsley possesses a high nutritional content, which includes vitamins a, b, and c, as well as essential mineral nutrients. the purity and chemical composition of fertilizers containing the same element can vary significantly. this difference has an important effect related to the method of usage, time of application, and the effectivity of fertilizers. nitrate, ammonium, and urea are the primary sources of mineral nitrogen for higher plants, each with distinct chemical properties and varying impacts on plant growth. hence, to examine the impact of various nitrogen sources on parsley, a study was carried out using a factorial combination of three nitrogen forms (calcium nitrate, ammonium sulfate, and urea) and four nitrogen levels (0, 100, 125, and 150 kilograms per hectare). the study employed a completely randomized basic design with three replications. the findings indicated that all measured parameters were significantly influenced by the nitrogen (n) sources. the greatest fresh weight of shoots, fresh weight of roots, vitamin c concentration in the leaves, and concentration of calcium (ca) in the leaves were achieved with an application of 150 kg/ha of calcium nitrate. the highest dry weight of shoots, plant height, length of leaves, and iron (fe) concentration in the leaves were observed with an application of 150 kg/ha of ammonium sulfate. the highest levels of total chlorophyll (a+b) were recorded with an application of 150 kg/ha of urea.