USPEVANJE SORT KORUZE (Zea mays L.) V RAZMERAH SUŠNEGA STRESA

Kazem GHASSEMI-GOLEZANI, Shabnam HEYDARI, Bahareh DALIL

Povzetek


Raziskava je bila opravljena v sezoni 2014 na Research Farm of the University of Tabriz, Iran. Poskus je bil zasnovan kot poskus z deljenkami na osnovi popolnega naključnega bločnega poskusa s tremi ponovitvami za ovrednotenje učinkov štirih načinov namakanja (namakanje po 60, 80, 100 in 120 mm evaporacije) na osnovi fizioloških in agronomskih lastnosti treh sort koruze (Zea mays L.; ‘SC704’, ‘NS640’, ‘DC303’: zgodnje, srednje in pozno dozorevajoča sorta). Načini namakanja so bili vrednoteni na glavnih ploskvah, sorte koruze na podploskvah. Temperatura lista je pri vseh sortah značilno naraščala z večanjem intervala namakanja, lastnosti kot so indeks vsebnosti klorofila, maksimalna učinkovitost fotosistema II, število zrn na rastlino, masa 1000 zrn, biomasa rastlin, pridelek zrnja in žetveni indeks pa so se z večanjem intervala namakanja značilno zmanjšale. Pozno dozorevajoča sorta (‘SC704’) je bila v vseh preučevanih lastnostih najboljša, sledili sta ji srednje (‘NS640’) in zgodaj (‘DC303’) dozorevajoči sorti. Ugotovljeno je bilo, da pomanjkanje vode lahko potencialno zmanjša uspevanje koruze, a je obseg zmanjšanja odvisen od genotipa in jakosti stresa.

Ključne besede


vsebnost klorofila; temperature lista; koruza; fotosistem II, sušni stres

Celotno besedilo:

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DOI: http://dx.doi.org/10.14720/aas.2018.111.1.03

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