Farklı Arazi Kullanımının Toprağın Bazı Mikrobiyal Oranları Üzerine Etkisi

Mikrobiyal biyokütle toprak oluşumunun canlı bileşeni olduğu için toprağın biyolojik durumu hakkında iyi bir gösterge olarak hizmet etmektedir. Bartın İli Ağdacı Köyü mevkiinde bulunan araştırma alanı; orman, mera ve tarım alanlarını içermektedir. Bu çalışmanın amacı; farklı arazi kullanım biçimi altındaki (orman, mera ve tarım) üst toprakların (0–5 cm) bazı mikrobiyal oranlarını (Cmic/Corg, Cmic/Nmic ve Nmic/Ntotal) belirlemektir. Çalışmanın materyal kısmını üst topraktan alınan toprak örnekleri oluşturmaktadır. Toprakların organik karbon (Corg), toplam azot (Ntotal), mikrobiyal biyokütle C (Cmic) ve mikrobiyal biyokütle N (Nmic) sonuçları elde edildikten sonra bu değerler birbirlerine oranlanarak toprakların mikrobiyal oranları (Cmic/Corg, Cmic/Nmic ve Nmic/Ntotal) elde edilmiştir. Çalışma sonucunda mikrobiyal oranlar (Cmic/Corg, Cmic/Nmic ve Nmic/Ntotal) bakımından orman, mera ve tarım alanları arasında farklılıkların olduğunu ortaya çıkarmıştır. Bu oranlar topraktaki organik maddenin ayrışma durumunu ve hakim mikroorganizma gruplarını (bakteri ve mantar) göstermesi bakımından önemlidir.

The Effect of Different Land Use on Some Microbial Ratios of Soil

Microbial biomass serves as a good indicator of the biological condition of the soil, because it is a living component of soil formation. The research area located in the Ağdacı Village of Bartın Province includes forest, pasture and agricultural areas. The aim of this study is to determine some microbial ratios (Cmic/Corg, Cmic/Nmic and Nmic/Ntotal) of the topsoil (0–5 cm) under different land use (forest, pasture and agriculture). The material part of the study comprises soil samples taken from the topsoil. After the organic carbon (Corg), total nitrogen (Ntotal), microbial biomass C (Cmic) and microbial biomass N (Nmic) results of the soils were obtained, these values were proportioned to each other, and then microbial ratios (Cmic/Corg, Cmic/Nmic and Nmic/Ntotal) were obtained. As a result of the study, it has been revealed that there are differences between forest, pasture and agricultural areas regarding microbial ratios (Cmic/Corg, Cmic/Nmic and Nmic/Ntotal). These ratios are of great importance in terms of demonstrating the decomposition status of organic matter in the soil, and the dominant microorganism groups (bacteria and fungi).

Keywords:

Forest, Cmic/Corg (%), Pasture Cmic/Nmic ratio, Bartın,

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