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  • Küçük Resim
    Öğe
    Agronomic importance of first development of chickpea (Cicer arietinum L.) under semi-arid conditions: II. Seed Imbibition
    (Science Alert, 2012) Ulukan, Hakan; Bayraktar, N.; Oksel, A.; Gürsoy, Mehtap; Koçak, Nilüfer
    Due to the slowness growth and weakness of the first developments of chickpea (Cicer arietinum L.), it could not combated with weeds and easiliy caught up by Ascochyta blight (Ascochyta rabiei (Pass) Labr.) disease. Additionally, due to biotic and abiotic stress factors, esp. at the late sowing, important seed yield losses could be happened. To be able to avoid from them is only possible to accelerate of its first development as possible as. So, one of the best solutions to is to use chemical compounds such as Humic Acid (HA) known soil regulator under the semi-arid conditions. With this aim this research was performed in a Randomized Complete Block Design (RCBD) with four replications under semi-arid field conditions during (2008/2009) and (2009/2010) in Turkiye. Two cultivars (V1 = Gokce and V2 = Ispanyol) and four seed imbibition methods (A0 = 0, Al = Tap Water, A2 = 1/2 Tap Water + 1/2 Humic acid (HA), A3 = Full HA, as w/w) and seven yield components Plant Height (PH), Number of Branches per Plant (NBP), Number of Pods per Plant (NPP), First Pod Height (NFP), Number of Seeds per Pod (NSP), Seed Weight per Plant (SWP) and 100-Seed weight (HSW) were investigated. The PH and FPH were affected the A0, the NBP, NPP and NSP were affected the A2 and the SWP and HSW were given the varied but not clear responses according to varieties for all the parameters in A1. The A0 and A1 were encouraged the germination and top soil of the plant but, the A2 to A3 were encouraged root system's development. It was concluded that the A2 is a promising method which makes the maximum and positive effect to the first development of the chickpea agronomy under the semi-arid conditions
  • Küçük Resim
    Öğe
    Bitkisel üretimde allelopati
    (Uludağ Üniversitesi, 2013) Gürsoy, Mehtap; Balkan, Alpay; Ulukan, Hakan
    Bitkide üretilen ve ikincil metabolit olan allelokimyasalların neden olduğu “allelopati”; direkt ya da dolaylı olarak önemli bir yere sahiptir. Genel olarak, kendinden sonra gelen aynı (autotoxicity) ya da farklı türlere (heterotoxicity) ait bitki kökler tarafından üretilen bu maddeler ya büyüme ve gelişmeyi azaltıp, durdurabilmekte ya da tamamen önleyebilmektedir. Bu olayda bitkinin yaşı, toprağın yapısı, genotip, nem, ışık, sıcaklık, nem, ekoloji gibi faktörler çok önemlidir. Özellikle sürdürülebilirlik bakımından ekim nöbeti, anızlı nadas, malçlı nadas gibi çeşitli yetiştiricilik tekniklerini kullanmanın büyük bir yeri vardır. Genotip, toprak, ekoloji ve yetiştiricilik teknikleri dikkate alınmazsa, tarımsal üretimin düzeyi bitki besin maddeleri, nem, sıcaklık, stres faktörleri ve kendinden sonra gelen bitkiye bıraktığı tohum yatağı, özellikle de bitki kök bölgesindeki allelopatik madde(lerin) konsantrasyonunca belirlenir. Nitekim ortam nem miktarındaki fazlalık ya da aşırılıktan dolayı (örnek Karadeniz bölgesi); tarımı yapılan bitkinin üretiminde allelopatik etkileşim(ler)’den dolayı azalmalar ortaya çıkmakta; ancak özellikle nem oranındaki azalmalar allelopatik kaynaklı olumsuzlukların her zaman aynı şiddette oluşmasını önlemektedir.
  • Küçük Resim
    Öğe
    Ecophysiological responses to stresses in plants: A general approach
    (2012) Gürsoy, Mehtap; Balkan, Alpay; Ulukan, Hakan
    Stress (abiotic and biotic) factors reflect and specify the plant morphology and called as "stress" and have negative effect(s) on growth, development, quality, quantity and can reduce average plant productivity by 65 to 87%, depending on the plants and stage(s) and also give various permanent or temporary damage(s) according to length of exposed period, violence/density, developmental stage, age, etc. Researches have revealed that despite the advanced technology levels the fundamental basis of stress have not been understood comprehensively. Firstly taken response(s) has/have not yet fully understood and secondly any "resistance" or "tolerance level of a variety/species" because of their complex structure(s). But, this point is clear that with the help or assistance of "multi-disciplinary" approaches, it will be able to get promising result(s) in near future. This review focuses some of the ecophysiological responses of plants to biotic and abiotic stresses.