Effect of Drought Stress and Seed Pretreatment with CCC on Yield and Yield Components of Maize Varieties

Öz

In order to study the effects of drought stress and seed pretreatment of two maize varieties with Cycocel an

experiment was carried out with the aim to reduce the stress on the yield of this crop during their critical growth

stages.Field trials were arranged in split-split plot design and randomized complete block design with three

replications. For statistical evaluation, irrigation as the main factor at four levels (complete irrigation as the control

and eliminating one stage of irrigation at the beginning of stalking, tasseling and dough stages), maize var. KSC704

and KSC666 as the sub factor at two levels and application of Cycocel as the sub-sub factor at three levels (0,

0.4, and 0.8 g L-1 concentration) were created.Eliminating one stage of irrigation in stalking and tasseling stages

affected the ear length, ear diameter, grain number per ear, grain number per row and ultimately the grain yield,

while the drought stress at dough stage had no significant difference in the results of the experiment compared

to the control group. Apart from enhancing 1000-grain weight, the use of Cycocel pretreatment affected the test

results slightly and comparison of these findings with similar studies, which applied Cycocel as foliar, indicates

the higher ability of foliar than the pretreatment.

Anahtar Kelimeler

• Chlormequat Chloride,Drought,Irrigation,Maize,PGRs

Mısır Varyetelerinde Kuraklık Stresi ve Tohumlarına Cycocel Uygulamasının Verim ve Verim Componentleri Üzerine Etkisi

Öz

Bu deneme iki farklı mısır varyetesinde, bitkinin en hassas büyüme ve gelişme dönemlerinde kuraklık stresi ve

tohumlara bitki büyüme düzenleyici olarak Cycocel muamelesinin verim üzerine etkilerinin en aza indirmek

amacıyla kurulmuştur. Deneme Split-split Plot Deneme Desenine göre 3 tekrarlamalı olarak yürütülmüştür.

İstatistiksel değerlendirmede, sulama ana parselleri dört düzeyde (düzenli sulama kontrol ve sapa kalkma dönemi,

çiçeklenme dönemi ve danelerin hamurlaşma döneminin başında bir nöbet sulama kesintisi), mısır varyetesi alt

parselleri iki düzeyde (KSC704 ve KSC666) ve Cycocel uygulaması alt-alt parsellerini üç düzeyde (0, 0.4, and 0.8

g L-1 concentration) oluşturmuştur. Kontrol bitkilerle karşılaştırıldığında sapa kalkma ve çiçeklenme dönemlerinin

başında bir nöbet su kesimi koçan uzunluğu, koçan çapı, koçanda dane sayısı, her sırada dane sayısı ve dane

verimini olumsuz etkileyerek, dane hamurlaşma dönemi kuraklık stresinden etkilenmemiştir. Mısır tohumlarında

Cycosel uygulaması 1000 dane ağırlığı yükselişi hariç, deneme sonuçlarını çok az etkilemiştir. Bu bulgular diğer

benzeri araştırma sonuçlarıyla karşılaştırıldığında yapraktan uygulama Cycocel yöntemi, tohum uygulamasından

daha etkilidir.

Anahtar Kelimeler

• Chlormequat Chloride,Kuraklık,Mısır,PGRs,Sulama

Kaynakça

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