Effects of soil tillage systems on aggregate-associated total carbon and nitrogen contents under Çukurova conditions

Yıl 2017, Cilt: 32 Sayı: 3, 383 - 390, 15.10.2017

İsmail Celik Mert Acar

https://doi.org/10.7161/omuanajas.289801

Cited By: 2

Öz

The effect of six different tillage methods under
long-term (2006-2014) wheat-maize and wheat-soy rotations on
aggregate-assosicated total carbon and nitrogen content in two different depths
(0-15, 15-30 cm) were studied under Çukurova conditions in approximately 50 %
clay containing soil. The tillage systems consisted of conventional tillage
with stubble (CT-1), conventional tillage with stubbles burned (CT-2), heavy
disc harrow reduced tillage (RT-1), rototiller reduced tillage (RT-2), reduced
tillage with heavy tandem disc harrow fallowed by no-tillage (RNT), and no-till
(NT). Each tillage method applied at 480 m² plot and replicated
three times in randomly distributed plots. Aggregate-associated
total C contents in 0-15 cm depth were obtained higher in
conservation tillage treatments compared to traditional tillage techniques at
all aggregate sizes (>4.0 mm, 4.0-2.0 mm, 2.0-1.0 mm and 1.0-0.5 mm). Aggregate-associated
total C values under conservation tillage methods decreased with increasing
soil depth. In both depths (0-15, 15-30 cm) and at all
aggregate sizes the highest total nitrogen concentration values were determined
in RT-1 tillage treatment. Significant enhancements of total carbon bounding in
aggregates were observed in conservation tillage methods compared to
traditional tillage methods. Except for RT-1 in other conservation tillage
methods (NT, RNT and RT-2) total nitrogen values were lower compared to
conventional tillage methods.

Anahtar Kelimeler

Aggregate, Conservation tillage, No-till, Total nitrogen, Total carbon

Çukurova koşullarında toprak işleme yöntemlerinin agregatlara bağlı toplam karbon ve azot içerikleri üzerine etkileri

Öz

Çukurova koşullarında yaklaşık % 50
oranında kil içeren bir toprakta uzun süreli (2006-2014) buğday-mısır ve
buğday-soya rotasyonu altında altı farklı toprak işleme yönteminin iki farklı
derinlikte (0-15 ve 15-30 cm) agregatlara bağlı toplam karbon ve azot içeriğine
etkileri araştırılmıştır. Toprak işleme uygulamaları olarak; Anızlı geleneksel
toprak işleme (Gİ–1), Anızları yakılmış geleneksel toprak işleme (Gİ–2), Ağır
diskli tırmıklı azaltılmış toprak işleme (ATİ–1), Rototillerli azaltılmış
toprak işleme (ATİ–2), Ağır diskli tırmıklı azaltılmış sıfır toprak işleme
(ASTİ) ve Doğrudan ekimli sıfır toprak işleme (STİ) yöntemleri kullanılmıştır.
Her bir işleme yöntemi 480 m²’lik alana uygulanmakta ve 3 tekerrürlü
tesadüf parselinden oluşmaktadır. 0-15 cm derinlikte bütün agregat boyutlarında
(>4.0 mm, 4.0-2.0 mm, 2.0-1.0 mm ve 1.0-0.5 mm) toplam karbon değerleri
geleneksel işleme yöntemlerine kıyasla korumalı işleme uygulamaları altında
daha yüksek değerler elde edilmiştir. Derinlikteki artışla birlikte korumalı
işleme yöntemleri altındaki agregatlarda bulunan toplam karbon değerleri azalmıştır.
Her iki derinlikte (0-15 cm ve 15-30 cm) ve bütün agregat boyutlarında (>4.0
mm, 4.0-2.0 mm, 2.0-1.0 mm ve 1.0-0.5 mm) en yüksek toplam azot değerleri ATİ-1
işleme yöntemi altında belirlenmiştir. Korumalı işleme yöntemleri, geleneksel
işleme yöntemlerine kıyasla agregatlar içerisinde toplam karbonun bağlanmasında
önemli iyileşmeler sağladığı belirlenmiştir. ATİ-1 hariç diğer korumalı işleme
yöntemlerinde (STİ, ASTİ ve ATİ-2) geleneksel işlemelere göre daha düşük toplam
azot değerleri belirlenmiştir. 

Anahtar Kelimeler

Agregat, Korumalı işleme, Sıfır işleme, Toplam azot, Toplam karbon

Kaynakça

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