Depth-Based Alteration of Cmic and Nmic in Topsoils under the Spruce Stands

Year 2022, Volume: 24 Issue: 3, 637 - 650, 15.12.2022

Kamil Çakıroğlu , Ömer Kara , İlyas Bolat

https://doi.org/10.24011/barofd.1202314

Abstract

In this study, the variation of characteristics such as organic C, total N, decomposition rate (Corg/Ntotal), microbial biomass C (Cmic) and N (Nmic) of soils under pure oriental spruce (Picea orientalis L.) forest with soil depth were investigated. The research area is located in the Fol Stream Micro Basin within the borders of Vakfikebir and Tonya Districts of Trabzon province. In the study area, randomly 10 sample points were determined to represent the area, and soil sampling was conducted from two different depth levels (0–15 cm and 15–30 cm depth) from these points. For some physical, chemical an microbial analyzes of the soils from the area, a total of 20 soil samples were taken, being 10 from each depth level. As a result of the study, according to the soil depth, % sand, and % silt contents showed statistical differences from each other (P < 0.05). Similarly, organic C, total N, and (Corg/Ntotal) values were found to be statistically different from each other (P < 0.05) according to both depth levels. It was determined that the Cmic contents of the soils varied between 437.40–1315.20 μg g-1 at the 0–15 cm depth level and 194.20–578.20 μg g-1 at the 15-30 cm depth level. The Nmic contents of the soils are on average 88.08 ± 8.08 μg g-1 at the 0–15 cm depth level and 41.17 ± 4.32 μg g-1 at the 15–30 cm depth level. It was revealed that the soils’ Cmic and Nmic contents showed statistical differences (P < 0.05) according to the soil depth. In addition, it was determined that there was a positive and significant correlation between organic C and total N content of soils and Cmic and Nmic. The results obtained in the study show that soil properties that change with soil depth affect Cmic ve Nmic contents.

Keywords

Picea orientalis L., terrestrial ecosystem, microbial indicator, soil organic carbon, soil characteristic

Thanks

Bu makale 23-25 Kasım 2022 tarihleri arasında Ankara'da düzenlenen "5th International Eurasian Conference on Biological and Chemical Sciences"ta sözlü olarak sunulmuştur.

Ladin Meşcereleri Üst Topraklarında Derinliğe Göre Cmic ve Nmic 'in Değişimi

Abstract

Bu çalışmada saf doğu ladini (Picea orientalis L.) ormanı altındaki toprakların özellikle organik C, toplam N, ayrışma oranı (C_org/N_toplam), mikrobiyal biyokütle C (C_mic) ve N (N_mic) gibi karakteristiklerinin toprak derinliği ile değişimi araştırılmıştır. Araştırma sahası Trabzon ili Vakfıkebir ve Tonya İlçeleri sınırlarında bulunan Fol Deresi Mikro Havzası’nda yer almaktadır. Çalışma alanında alanı temsilen, rastgele 10 adet örnek nokta belirlenmiş ve bu noktalardan farklı iki derinlik kademesinden (0–15 cm ve 15–30 cm derinlik) toprak örneklemesi yapılmıştır. Alandan toprakların bazı fiziksel, kimyasal ve mikrobiyal analizleri için her derinlik kademesinden 10’ar örnek olacak şekilde toplamda 20 adet toprak örneği alınmıştır. Çalışma sonunda toprak derinliğine göre, % kum ve % toz içerikleri istatistiki olarak birbirinden farklılık (P<0,05) göstermiştir. Benzer olarak organik C, toplam N ve (C_org/N_toplam) değerlerinin her iki derinlik kademesine göre istatistiksel olarak birbirinden farklı (P < 0,05) olduğu ortaya çıkmıştır. Toprakların Cmic içerikleri, 0-15 cm derinlik kademesinde 437,40–1315,20 μg g^-1 ve 15-30 cm derinlik kademesinde 194,20–578,20 μg g^-1 arasında değişim gösterdiği tespit edilmiştir. Toprakların Nmic içerikleri, 0–15 cm derinlik kademesinde ortalama 88,08  8,08 μg g^-1 ve 15–30 cm derinlik kademesinde ortalama 41,17  4,32 μg g^-1’dır. Toprakların hem C_mic hem de N_mic içeriklerinin toprak derinliğine göre istatistiksel farklılık (P<0,05) gösterdiği ortaya çıkmıştır. Ayrıca toprakların organik C ve toplam N içeriği ile Cmic ve Nmic arasında pozitif ve anlamlı bir korelasyonun olduğu belirlenmiştir. Çalışmada elde edilen sonuçlar, toprak derinliğine göre değişen toprak özelliklerinin C_mic ve N_mic içerikleri üzerinde etkili olduğunu göstermektedir.

Keywords

Doğu ladini, karasal ekosistem, mikrobiyal gösterge, toprak organik karbonu, toprak özelliği

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