Mehmet ÖĞÜT, Mustafa KILIÇ, Abdulreşit BROHI

Azospirillum Brasilense Sp7 ve iki Rhizobium suşunun Türkiye' de yaygın olarak yetiştirilen bazı fasulye (Phaseolus vulgaris L.) çeşitlerinde kuru madde miktarı ve azot kapsamına etkileri

Azospirillum, zayıf bir azot fıkse edicisi olan fasulyede (Phaseöhıs vulgaris L.), aşıdaki RhizobiunrAzospiriUnm oranına bağlı olarak, değişik mekanizmaların etkisiyle kum madde miktarını ve nodülasyonu çoğaltmak yoluyla azot fiksasyonunu artırmaktadır. Azospirillum'un bu etkisinin fasulye çeşitlerinden bağımsız olup olmadığı belirlenmemiştir. Bunu belirlemek için, iki faktör (Azospirillum brasilense Sp7 ve Rhizobium konsantrasyonları) içeren, genelleştirilmiş tesadüf blokları (fasulye çeşitleri) deneme desenine göre düzenlenmiş 3 tekrarlaman saksı denemesi yürütülmüştür.Rhizobium uygulamaları, sap ağırlığı, kök ağırlığı ve % kök azotunu; Azospirillum brasilense Sp7. sadece sap ağırlığını artırmıştır (p

Anahtar Kelimeler:

Phaseolus vulgaris, soy, kültür çeşitleri, kuru madde, azot miktarı, fasulye, azot fiksasyonu, Rhizobium, Azospirillum brasilense

The effects of Azospirillum Brasilense Sp7 and two Rhizobium strains on dry matter and nitrogen content of some dry bean (Phaseolus Vulgaris L.) cultivars commonly grown in Turkey

Azospirillum, depending on Azospirillum:Rhizobium cell ratio in inoculant, increases dry matter accumulation and N content by enhancing nitrogen fixation in bean (Phaseohis vulgaris L.). Whether mis effect of Azospirillum is additive with respect to bean cultivar is not determined. To determine this, a pot experiment, designed as a generalized randomized blocks (bean cultivars) with two factors (Azospirillum brasilense Sp7 density and Rhizobium density) and three replications was conducted. Rhizobium increased the shoot and root dry-weights, and root nitrogen content (p<0.01). Azospirillum increased shoot weights only (p<0.01). The shoot content increased as both Rhizobium and Azospirillum cell density increased accordingly. As Rhizobium density increased the root dry weight tended to increase. The highest root nitrogen content was obtained at the lowest Rhizobium density. Generally, the best cultivar in terms of plant growth was Şeker. Azospirillum, although did not affect the nitrogen content, increased the shoot dry weight. This study, in addition to the earlier proposals, suggests that Azospirillum's major contribution in bean growth is by direct growth promoting mechanisms rather than biologically fixed nitrogen.

Keywords:

Phaseolus vulgaris, strains, cultivars, dry matter, nitrogen content, bean, nitrogen fixation, Rhizobium, Azospirillum brasilense,

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Gaziosmanpaşa Üniversitesi Ziraat Fakültesi Dergisi-Cover

ISSN: 1300-2910
Yayın Aralığı: Yılda 3 Sayı
Başlangıç: 1985
Yayıncı: Tokat Gaziosmanpaşa Üniversitesi Ziraat Fakültesi Dergisi Yayın Ofisi