Yarı kurak koşullarda bitki grubu büyüklüğünün bazı toprak kimyası parametrelerine etkisi

Year 2019, Volume: 69 Issue: 2, 117 - 123, 01.07.2019

Mehmet Said Özçelik , Ferhat Gökbulak Kamil Şengönül

Abstract

DOI: 10.26650/forestist.2019.19001

Bu çalışma, farklı büyüklükteki bitki
örtüsü gruplarının toprak kimyası üzerindeki etkilerinin incelenmesi amacıyla
İç Anadolu’nun yarıkurak özelliklerini temsil eden Çankırı bölgesinde
gerçekleştirilmiştir. İncelenen toprak kimyası parametreleri, elektriksel
iletkenlik, pH, potasyum, kalsiyum, magnezyum, fosfor, toplam azot ve toplam
karbon’dur. Bitki örtüsü grupları, tepe tacı çapının büyüklüğüne göre 0-4 metre
(m) (küçük), 4-8 m (orta) ve > 8 m (büyük) olmak üzere üç gruba ayrılmıştır.
Toprak örnekleri tepe tacının hemen altından ve tepe tacının çapı kadar
uzağından olmak üzere 10 cm derinliğinde üst topraktan üçer örnek olarak
alınmış ve bu toprak örnekleri her bitki örtüsü büyüklüğünü temsil etmek üzere
karıştırılarak tek bir genel örnek haline getirilmiştir. Toplamda, küçük bitki
grupları için 20, orta ve büyük bitki grupları için 14’er adet genel toprak
örneği oluşturulmuştur. Sonuçlar, bitki gruplarının büyüklüğünün üst topraktaki
fosfor ve toplam azot üzerinde etkili olduğunu, diğer parametreler üzerinde ise
istatistiki anlamda herhangi bir etkisinin olmadığını göstermiştir. Büyük bitki
gruplarından alınan toprak örneklerindeki fosfor miktarı 0,03 gram/litre (g/L)
ile orta (0,01 g/L) ve küçük (0,01 g/L) bitki gruplarından alınan örneklerden
yüksek çıkmıştır. Toplam azot miktarı da büyük bitki gruplarından alınan
örneklerde (%0,70), orta (%0,60) ve küçük (%0,62) bitki gruplarından alınan
toprak örneklerindekinden önemli ölçüde yüksek çıkmıştır. Hem azot hem de fosfor
bitki gelişiminde ve yaşamında önemli besin elementleri olduğundan, sonuçlar
yarıkurak koşullarda yapılacak rehabilitasyon çalışmalarında büyük bitki
gruplarının toprakların azot ve fostor içeriğine yaptıkları pozitif etkiden
dolayı temizlenmeyerek sahada bırakılmalarının uygun olacağını
göstermektedir.  

Cite this paper as: Özçelik, M.S.,
Gökbulak, F., Şengönül, K., 2019. Effect of vegetation patch size on selected
chemical properties of soils under semiarid climate conditions. Forestist
69(2): 117-123.

Keywords

Besin zengini alanlar, bitki grubu büyüklüğü, İç Anadolu, toprak besin maddeleri, toprak kimyası

Effect of vegetation patch size on selected chemical properties of soils under semiarid climate conditions

Abstract

DOI: 10.26650/forestist.2019.19001

This study aimed to investigate effects of
vegetation patches of different sizes on selected chemical characteristics of
soil. The study was carried out in a semiarid region of Central Anatolia. Based
on average diameter of the canopy, vegetation patches in the site were divided
into three groups: 0–4 meters (m) (small), 4–8 m (medium), and >8 m (large).
Soil samples were collected from under the patch canopy and near the canopy at
the topsoil. The soil samples were mixed, and one subsample was taken as a
representative of each patch size. A total of 20 subsamples for the small, 14
for the medium-sized, and 14 for the large patches were collected. The soil
samples were analyzed for electrical conductivity, pH, potassium, calcium,
magnesium, phosphorus, total nitrogen, and total carbon. Results showed that
patch size had a significant effect on the phosphorus and total nitrogen
contents of the topsoil. Topsoil around the large patches had significantly
greater phosphorus content 0.03 grams/liter (g/L) than small (0.01 g/L) and
medium-sized (0.01 g/L) patches. Similar to phosphorus values, the topsoil around
the large patches had significantly greater total nitrogen content (0.70%) than
the topsoil around the small (0.62%) and medium-sized (0.60%) patches. Since
both nitrogen and phosphorus nutrients are important elements for early plant
growth and survival, large patches should not be cleared from the sites during
the land rehabilitation works due to their positive impacts on the topsoil
under fragile landscape conditions in the semiarid regions. 

Cite this paper as: Özçelik, M.S.,
Gökbulak, F., Şengönül, K., 2019. Effect of vegetation patch size on selected
chemical properties of soils under semiarid climate conditions. Forestist
69(2): 117-123.

Keywords

Central Anatolia, fertility island, patch size, soil chemistry, soil nutrients

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