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

Year 2019, Volume: 21 Issue: 3, 899 - 910, 15.12.2019

Mehmet Küçük İsmet Yener

https://doi.org/10.24011/barofd.584921

Cited By: 3

Abstract

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.

Keywords

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

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