The role of Bio–Fertilizer amendments on aggregate formation

Abstract

In this study, the effects of five different bio-fertilizers (with alone or different combination) on aggregate formation in clay–loam (Typic Xerofluvent) textured soil, in which maize (Zea mays L.) plant was grown, were investigated. The study was conducted as a pot experiment under greenhouse conditions and arranged using Completely Randomized Block Design with three replications for 90 days. The study consisted of eleven experimental treatments: Control (no fertilizer) (K), inorganic fertilizer (15:15:15 compound fertilizer + ammonium nitrate, 33% N) (G), bio–fertilizer containing mycorrhizal fungi (Glomus spp.) (M), bio–fertilizer containing microalgae (Chlorella spp.) (A), bio–fertilizer containing bacteria (Bacillus megaterium KBA–10 + Pantoea agglomerans RK–134 + Pseudomonas fluorescens FDG–37) (BMF), another biofertilizer containing bacteria (Bacillus subtilis PA1 + Paenibacillus azotofixans PA2) (BCP), vermicompost (V), vermicompost + mycorrhizal fungi (VM), vermicompost + microalgae (VA), vermicompost + bacteria (VBMF), vermicompost + bacteria (VBCP). At the end of the experiment, the results showed that bio-fertilizer treatments tended to increase the formation of macro– aggregates. The amount of macro– aggregates was significantly enhanced by treatments compared to control (>4 mm size class by BCP, 4–2 mm size class by M treatment, 2–1 mm size class by M, A and V treatments). The amount of aggregates >4 mm was greatly increased as a result of combined applications of bio–fertilizers and vermicompost.

Keywords

• Algae,Bacteria,Mycorrhiza,Vermicompost

Biyo–Gübre uygulamalarının agregat oluşumu üzerindeki rolü

Abstract

Bu çalışmada, beş farklı biyo–gübrenin (bireysel ve farklı kombinasyonlarda) mısır (Zea mays L.) bitkisinin yetiştirildiği killi tın tekstüre sahip bir toprağa (Typic Xerofluvent) uygulanarak agregat oluşumu üzerine etkileri belirlenmiştir. 90 günlük inkübasyon süresince sera koşullarında ve saksı denemesi olarak yürütülen çalışma, tesadüf parselleri deneme desenine göre 3 tekerrürlü olacak şekilde planlanmıştır. Çalışmada, kontrol (gübre uygulamasız) (K), inorganik gübre (G) (15:15:15 kompoze gübre + amonyum nitrat, % 33 N), mikoriza (M) (Glomus spp.), alg (A) (Chlorella spp.), bakteri (BMF) (Bacillus megaterium KBA-10+Pantoea agglomerans RK-134+Pseudomonas fluorescens FDG-37), bakteri (BCP) (Bacillus subtilis PA1+Paenibacillus azotofixans PA2), vermikompost (V) (750 kg da^-1), vermikompost+mikoriza (VM), vermikompost+alg (VA), vermikompost+bakteri (VBMF), vermikompost+bakteri (VBCP) olmak üzere on bir farklı uygulama denenmiştir. 90 günlük inkübasyon süresi sonunda, biyogübre uygulamaları makro– agregatların miktarında önemli artış meydana getirmiştir. BCP ve BMF uygulamaları >4 mm, M uygulaması 4–2 mm ve 2–1 mm, A ve V uygulamaları ise 2–1 mm boyuta sahip agregatların miktarında kontrole göre önemli düzeyde artış meydana getirmiştir. Çalışmada, >4 mm boyuta sahip agregatların miktarında özellikle vermikompost ile yapılan uygulamalarla önemli düzeyde artışlar elde edilmiştir.

Keywords

• Alg,Bakteri,Mikoriza,Vermikompost

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