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Journals / Türkiye Entomoloji Dergisi / 2026 / Cilt: 50 Sayı: 3

Nematode community composition and ecological indicators in cabbage, Brassica oleracea L. rhizosphere soils of Eastern Fergana Valley, Uzbekistan

Özbekistan'ın Doğu Fergana Vadisi'ndeki lahana, Brassica oleracea L. ekiliş alanlarında tespit edilen toprak nematodlarının topluluk ve ekolojik analizi

Sardorbek Kambarov(Andijan State University)0000-0003-1209-9178
Taylan Çakmak(DÜZCE ÜNİVERSİTESİ)0000-0003-4151-5724
Uğur Gözel(ÇANAKKALE ONSEKİZ MART ÜNİVERSİTESİ, ZİRAAT FAKÜLTESİ, BİTKİ KORUMA BÖLÜMÜ, BİTKİ KORUMA PR.)0000-0003-1363-1189
Sardorbek Narzullayev(Samarkand State University)0009-0003-3730-9423
Abduqayumova Sayyora(Fergana State University)0009-0002-7971-0533
Mirzakarim Mirzaxalilovich Yunusov(Fergana State University)0009-0007-8428-9436
Pages
311–326
Publication Date
2026-09-09
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

These findings highlight the diagnostic value of nematode-based indicators for evaluating soil health and emphasize the need for district-specific management strategies to support sustainable agricultural productivity in the region.

📌 3 Key Takeaways

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Objective & Hypothesis:This study examines the species composition, trophic structure, and ecological functioning of soil nematode communities in the rhizosphere of cabbage, Brassica oleracea L. (Brassicales: Brassicaceae) agroecosystems across six districts of the Eastern Fergana Valley, Uzbekistan.
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Key Findings & Data:The research was carried out during the spring and autumn seasons of 2024-2025.
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Conclusion & Impact:These findings highlight the diagnostic value of nematode-based indicators for evaluating soil health and emphasize the need for district-specific management strategies to support sustainable agricultural productivity in the region.
🔬Design:Araştırma Makalesi
📍Scope:2024-2025 Verileri
⚙️Variables:Tarım ekosistemleri · ekolojik göstergeler · lahana

Abstract

This study examines the species composition, trophic structure, and ecological functioning of soil nematode communities in the rhizosphere of cabbage, Brassica oleracea L. (Brassicales: Brassicaceae) agroecosystems across six districts of the Eastern Fergana Valley, Uzbekistan. To investigate the nematode fauna associated with cabbage plants, field studies were conducted in six districts located in the southeastern part of the Fergana Valley. The research was carried out during the spring and autumn seasons of 2024-2025. A total of 38 nematode species belonging to five orders were identified, reflecting considerable variation in faunal structure among sampling sites. Ecological indices, including the Maturity Index (MI), Enrichment Index (EI), Structure Index (SI), Plant-Parasitic Index (PPI), and Channel Index (CI), were used to assess soil food web status and ecosystem stability. Enrichment-dominated systems, particularly in Marhamat, were characterized by high EI values and the dominance of bacterivorous nematodes, whereas more mature and structured food webs were evident in districts such as Khojaobod and Buloqboshi, where higher MI and SI values were recorded. These findings highlight the diagnostic value of nematode-based indicators for evaluating soil health and emphasize the need for district-specific management strategies to support sustainable agricultural productivity in the region.

Özet

Bu çalışma, Özbekistan'ın Doğu Fergana Vadisi'ndeki altı bölgede bulunan lahana, Brassica oleracea L. (Brassicales: Brassicaceae) tarım ekosistemlerinin rizosferindeki toprak nematod topluluklarının tür bileşimini, trofik yapısını ve ekolojik işlevini incelemektedir. Lahana bitkileriyle ilişkili nematod faunasını araştırmak amacıyla, Fergana Vadisi'nin güneydoğu kesiminde yer alan altı bölgede saha çalışmaları yürütülmüştür. Araştırma, 2024-2025 ilkbahar ve sonbahar mevsimlerinde gerçekleştirilmiştir. Bu çalışmada, toplamda beş takıma ait 38 nematod türü tanımlanmış olup, örnekleme alanları arasında fauna yapısında önemli bir varyasyon gözlemlenmiştir. Toprak besin ağı durumunu ve ekosistem istikrarını değerlendirmek için Olgunluk İndeksi (MI), Zenginleşme İndeksi (EI), Yapı İndeksi (SI), Bitki-Parazit İndeksi (PPI) ve Kanal İndeksi (CI) gibi ekolojik indeksler kullanılmıştır. Özellikle Marhamat'ta zenginleşmenin baskın olduğu sistemler, yüksek EI değerleri ve bakteri ile beslenen nematodların baskınlığı ile karakterize edilirken, Khojaobod ve Buloqboshi gibi bölgelerde daha olgun yapılaşmış besin ağları gözlemlenmiştir. Bu bulgular, toprak sağlığını değerlendirmek için nematod bazlı toprak sağlığının değerlendirilmesindeki önemini ve bölgede sürdürülebilir tarımsal verimliliği desteklemek için bölgeye özgü yönetim stratejilerine duyulan ihtiyacı vurgulamaktadır.

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Cite This Article

Kambarov, S., Çakmak, T., Gözel, U., Narzullayev, S., Sayyora, A., Yunusov, M. M. (2026). Nematode community composition and ecological indicators in cabbage, Brassica oleracea L. rhizosphere soils of Eastern Fergana Valley, Uzbekistan. Türkiye Entomoloji Dergisi, Cilt: 50 Sayı: 3, 311–326. https://doi.org/10.16970/entoted.1926158

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