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We have studied the effect of nitrogen supply on growth as well as relation  on adaptation to light interception of leek (Allium porrum L.,) hybrid Alita,  genotype of known genetic background. During the vegetative and generative  plant growth phases, besides genetic potential many factors affect their  productivity. The aim was to investigate genome expression dependent on  nitrogen nutrition and light interception. Nitrogen in correlation with light  availability has important effect on the growth of plants and the formation  of leaf area, what it is necessary for yield of dry matter. Investigation has  been done in open field grown leek commercial hybrid Alita (Allium porrum  L.,) to consider the way of its genotype response to correlation of light  interception and nitrogen nutrition. Investigated traits are leek crop  productivity, light interception and chemical analyses of plants. Leek crop  productivity was determined through the dry matter production, leaf area  development and light interception. Analyses of leek plants comprehended  chemical determination and calculation of total nitrogen concentration,  nitrogen critical concentration in dry matter, nitrogen demand and, nitrogen  uptake in leek crop. Correlation among investigated parameters was assigned  to comprehensive hypothetical model of growth and productivity of leek crop  grown at open field.It was shown that for nitrogen uptake (Nu), nitrogen  demand (ND) and total nitrogen concentration (Nt) parameters variants of  mineral nutrition plays significant role (pNu=0.002; pND=0.045; pNt=0.011).  Obtained results indicated that correlation of nitrogen and light  interception could be used as criteria in plant breeding

Leek hybrid yield potentional and relation on adaptation to light interception under nitrogen supply