Allelopathic effect of Italian ryegrass (Lolium multiflorum Lam.) on emergence and initial growth of the corn (Zea mays L.)

Da bi ugotovili ali obstaja alelopatski vpliv mnogocvetne ljuljke (Lolium multiflorum Lam.) na vznik in začetno rast koruze (Zea mays L.), smo na Fakulteti za kmetijstvo in biositemske vede v letu 2010 izvedli poskus v rastni komori in lončni poskus v rastlinjaku. V laboratoriju smo ugotavljali vznik koruze v različnih na poskusnem polju odvzetih vzorcih zemlje, ki so predstavljali različna obravnavanja: zemlja odvzeta s korenin mnogocvetne ljuljke, zemlja odvzeta s korenin inkarnatke, zemlja iz kontrole (na njivi ni bilo rastlin dosevka). Statistično je bil poskus zasnovan kot naključni bloki s tremi obravnavanji v petih ponovitvah. V lončni poskus v rastlinjaku (split — plot metoda v šestih ponovitvah) sta bila vključena dva dejavnika: različna zemlja v lončkih in različni izpirki razkrajajočih se rastlin, s katerimi smo zalivali koruzo v lončkih. Poskuse v laboratoriju in rastlinjaku smo želeli zasnovati tako, da bi čim bolj posnemali dejansko dogajanje v tleh na njivi, ob in po setvi koruze. V nobenem od poskusov nismo uspeli dokazati alelopatskega vpliva mnogocvetne ljuljke na vznik in začetno rast koruze, saj različna obravnavanja niso statistično značilno vplivala na proučevane parametre koruze.In order to establish whether there is an allelopathic effect of the italian rygrass (Lolium multiflorum Lam.) on emergence and initial growth of corn (Zea mays L.), we performed an experiment in 2010 at the Faculty of Agriculture and Life Sciences in a growth room and in a pot in a greenhouse. We have experimented with the emergence of the corn in different types of soil which represented different treatment: soil taken from the roots of italian ryegrass, soil taken from the roots of crimson clover, control (soil from field whithaut catch crops). The experiment was deseigned as random blocks with three treatments in five replications. An experiment in the pot in a greenhouse (split-pilot in six replications) included two factors: different soil in pots and different leachates of decomposing plants with which we watered the corn in the pots. The experiments in the laboratory and the greenhouse were performed in a way to imitate as good as possible the actual events in the grounds on the field during and after sowing the corn. In none of the experiments we managed to prove the allelopathic effect of the italian ryegrass on emergence and initial growth of the corn since different treatments did not have a statistically significant influence on any the corn parameter under observation