Interferences of Johnson grass [Sorghum halepense L. (Pers.)] with some robust plant species

Abstract

Aims: Species that show strong competition strategies can shape the use of available resources, with the impact of environmental changes. Thus, the identification of the factors that influence the competitiveness of species with high populations plays an important role in determining the strategies that can be used to prevent the spread of these species. In this study the competitive abilities of Sorghum halepense (Johnson grass - SORHA) with Bromus japonicus (Japanese brome - BROJA), Salvia fruticosa (Anadolu sage - SALFR), Festuca rubra var. rubra (red fescue - FESRU) or Festuca ovina (sheep fescue - FESRU) species was examined.

Methods and Results: The competition trials were carried out in sterile 9 cm diameter petri dishes in laboratory. According to the results the competition relations were measured; the stem and root lengths of SORHA - BROJA, BROJA - SORHA, SORHA - FESOV and FESOV - SORHA, stem weights of SORHA - FESRU and FESRU - SORHA, and stem lengths of SORHA - SALFR and SALFR - SORHA differences are important compared to controls of these species.

Conclusions: Interferences are high in the plant-plant relationship between all species. This may indicate that it will be difficult for the selected species to be significantly affected by each other in the species composition.

Significance and Impact of the Study: Species with high competitiveness may show the ability to be the dominant species in their areas, which may significantly threat to biodiversity. Therefore, the data obtained from studies aimed at determining the competitiveness of strong plant species on each other can be used in management and / or precautionary studies that can be taken for saving biological diversity.

Keywords

• Competition,comparison,Sorghum,Bromus,Festuca,Salvia

Sorghum halepense L. (Pers).'nin bazı güçlü bitki türleri ile rekabetçi yeteneği

Abstract

Amaç: Yüksek rekabet gücüne sahip bitki türleri, çevresel değişimlerin de etkisiyle, mevcut kaynakların kullanımında önemli avantajlara sahiptir. Bu nedenle yüksek yayılım yeteneğine sahip olan türlerin rekabet yeteneklerine etki eden faktörlerin tespiti, bu türlerin yayılımını engellemek için kullanılabilecek stratejilerin belirlenmesinde önemli rol oynar.  Bu çalışmada Sorghum halepense ile Bromus japonicus (Japon bromu - BROJA), Salvia fruticosa (Anadolu adaçayı - SALFR), Festuca rubra var. rubra (rizomlu kırmızı yumak - FESRU) ve Festuca ovina (koyun  yumağı - FESOV) arasındaki rekabet ilişkisi araştırılmıştır.

Yöntem ve Bulgular: Rekabet denemeleri sterilize edilmiş 9 cm çapındaki petri kaplarında laboratuvar ortamında yürütülmüştür. Sonuçlara göre rekabet ilişkileri ölçülen; SORHA – BROJA, BROJA – SORHA, SORHA - FESOV ve FESOV- SORHA gövde ve kök uzunluklarının, SORHA – FESRU ve FESRU- SORHA arasında gövde ağırlıklarının, SORHA - SALFR ve SALFR- SORHA arasında ise gövde uzunluklarının arasındaki fark türlerin kontrollerine göre önemlidir. 

Genel Yorum: Tüm türler arasındaki yüksek bir etkileşim mevcuttur.  Bu durum seçilen türlerin tür kompozisyonlarında birbirlerinden ciddi oranda etkilenmelerinin zor olacağına işaret edebilir.

Çalışmanın Önemi ve Etkisi: Yüksek rekabet gücü gösteren türler bulundukları alanlarda baskın tür olma yeteneği gösterebilir. Bu durum ise biyolojik çeşitliliğe karşı önemli tehditlere neden olabilir. Dolayısıyla güçlü bitki türlerinin birbirleri üzerindeki rekabet yeteneklerinin tespitine yönelik çalışmalardan elde edilen veriler, biyolojik çeşitliliğin korunmasına yönelik alınabilecek yönetim ve/veya tedbir alma çalışmalarında kullanılabilir.

Keywords

• rekabet,karşılaştırma,Sorghum,Bromus,Festuca,Salvia

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