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

Abstract

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.

Dobijeni rezultati u ispitivanjima hibrida praziluka na genotipsko ispoljavanje prinosa, pomoću utvrđivanja intercepcije svetlosti lisnog pokrivača praziluka gajenog na otvorenom polju u uslovima dodatne mineralne ishrane azotom. Pokazano je da uticaj varijante đubrenja nije značajno statistički povezano sa produktivnošću useva, ali srednje odstupanje pokazuje da je za ostale ispitivane parametre varijanta 125 +125 efikasnija od varijante 250+0 prilikom berbe 91. dana od dana rasađivanja. U navedenim ispitivanjima posebna pažnja je posvećena ulozi genotipa i dinamici parametara azota u suvoj materiji useva praziluka kroz intercepciju svetlosti, koja može da pruži informacije o optimalnoj ishrani azotom u različitim fazama rastenja i razvića biljaka praziluka tokom vegetacionog perioda.