Farklı Arazi Kullanımlarının Toprakların Bazı Özellikleri ve Azot Mineralizasyonu Üzerindeki Etkisi (Rize, Kalkandere Örneği)

Öz

Bu çalışmada arazi kullanım farklılığının toprakların bazı özellikleri ile azot mineralizasyonu üzerindeki etkilerinin belirlenmesi amaçlanmıştır. Bu çalışma kapsamında Rize, Kalkandere’de orman, çay, fındık ve kivi alanlarının her birinden 5 farklı noktada örnekleme yapılmıştır. Her örnekleme alanından birer toprak çukuru açılarak 0-15 cm ve 15-30 cm derinlik kademelerinden 40’ar adet bozulmuş ve bozulmamış toprak örneği alınmıştır. Toprak örneklerinde tekstür, toprak reaksiyonu (pH), organik karbon, toplam azot, karbon/azot oranı, elektriksel iletkenlik (EC), kireç (CaCO₃), hacim ağırlığı ve azot mineralizasyonu gibi özellikler belirlenmiştir. Arazi kullanım durumuna göre toprak özelliklerindeki farklılığı belirlemek için nanparametrik Kruskal Wallis testi uygulanmıştır. Arazi kullanım durumuna ilişkin ikili karşılaştırmalarda ise Dunn’s Bonferroni test uygulanmıştır. Analiz sonuçlarına göre 0-15 cm derinlik kademesinde kil, pH, organik karbon, elektriksel iletkenlik, hacim ağırlığı, T₀NO₃, T0NH₄+NO₃, T₆₃NH₄ ve T₆₃NH₄+NO₃ gibi toprak özellikleri anlamlı şekilde farklılık gösterirken, 15-30 cm derinlik kademesinde bu özellikler kum, kil, pH, elektriksel iletkenlik, hacim ağırlığı, T₆₃NH₄ ve T₆₃NH₄+NO₃ şeklinde ortaya çıkmıştır. Bu çalışmaya göre doğal orman alanları topraklarının diğer arazi kullanım durumu topraklarına göre anlamlı bir şekilde daha az kil (p=0,008), EC (p=0,003), hacim ağırlığı (p=0,003), T₀NO₃ (p=0,006) ve T₀NH₄+NO₃ (p=0,005); daha fazla kum (p=0,006) ve T₆₃NH₄+NO₃ (p=0,007) içerdiği belirlenmiştir.

Anahtar Kelimeler

• Dunn’s Bonferroni,Kruskal Wallis,çay bahçesi,orman

Effect of Different Land Uses on Some Properties and N-Mineralization of The Soils (A case study from Rize, Kalkandere)

Abstract

The aim of the present study was to investigate the effect of of land use change on some properties and N-mineralization of the soils. For this purpose, 5-different point was sampled in each land use including natural forest, tea plantation, hazelnut and kiwi fields. Total 40 disturbed and undisturbed soil samples were taken from 0-15 cm and 15-30 soil depth in each sample plot. The texture, pH, electrical conductivity, CaCO₃ content, bulk density, total nitrogen, C/N ratio and N-mineralization were determined on each soil sample. Non-parametric Kruskal Wallis test was carried out to determine differences in given soil properties according to land uses. Then Dunn’s Bonferroni test was carried out for pairwise comparisons of the land-cover groups. As a result, while the clay content, pH, organic carbon, EC, bulk density, T₀NO₃, T₀NH₄+NO₃, T₆₃NH₄ and T₆₃NH₄+NO₃ in 0-15 cm soil depth were significantly (p<0,05) affected by land use change; in 15-30 soil depth, sand and clay content, pH, EC, bulk density, T₆₃NH₄ and T₆₃NH₄+NO₃ were affected. It was concluded that natural forests’ soils have had significantly less clay content (p=0,008), EC (p=0,003), bulk density (p=0,003), T₀NO₃ (p=0,006) and T₀NH₄+NO₃ (p=0,005); more sand content (p=0,006) and T₆₃NH₄+NO₃ (p=0,007) compared to the other land uses.

Keywords

• Kruskal Wallis,Dunn’s Bonferroni,forest,tea plantation

Kaynakça

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