anajas

Anadolu Tarım Bilimleri Dergisi

1308-8750 1308-8769

Ondokuz Mayıs Üniversitesi

10.7161/omuanajas.289801

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

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

Celik

İsmail

CUKUROVA UNIV Acar

Mert

Çukurova Üniversitesi, Ziraat Fakültesi, Toprak Bilimi ve Bitki Besleme Bölümü, Adana, Türkiye

10 15 2017

32 3 383 390 02 04 2017 03 23 2017

1986

Anadolu Tarım Bilimleri Dergisi

The effect of six different tillage methods underlong-term (2006-2014) wheat-maize and wheat-soy rotations onaggregate-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 tillagewith stubble (CT-1), conventional tillage with stubbles burned (CT-2), heavydisc harrow reduced tillage (RT-1), rototiller reduced tillage (RT-2), reducedtillage with heavy tandem disc harrow fallowed by no-tillage (RNT), and no-till(NT). Each tillage method applied at 480 m2 plot and replicatedthree times in randomly distributed plots. Aggregate-associatedtotal C contents in 0-15 cm depth were obtained higher inconservation tillage treatments compared to traditional tillage techniques atall aggregate sizes (>4.0 mm, 4.0-2.0 mm, 2.0-1.0 mm and 1.0-0.5 mm). Aggregate-associatedtotal C values under conservation tillage methods decreased with increasingsoil depth. In both depths (0-15, 15-30 cm) and at allaggregate sizes the highest total nitrogen concentration values were determinedin RT-1 tillage treatment. Significant enhancements of total carbon bounding inaggregates were observed in conservation tillage methods compared totraditional tillage methods. Except for RT-1 in other conservation tillagemethods (NT, RNT and RT-2) total nitrogen values were lower compared toconventional tillage methods.

Çukurova koşullarında yaklaşık % 50oranında kil içeren bir toprakta uzun süreli (2006-2014) buğday-mısır vebuğday-soya rotasyonu altında altı farklı toprak işleme yönteminin iki farklıderinlikte (0-15 ve 15-30 cm) agregatlara bağlı toplam karbon ve azot içeriğineetkileri araştırılmıştır. Toprak işleme uygulamaları olarak; Anızlı gelenekseltoprak işleme (Gİ–1), Anızları yakılmış geleneksel toprak işleme (Gİ–2), Ağırdiskli tırmıklı azaltılmış toprak işleme (ATİ–1), Rototillerli azaltılmıştoprak 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 tekerrürlütesadüf 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 değerlerigeleneksel işleme yöntemlerine kıyasla korumalı işleme uygulamaları altındadaha yüksek değerler elde edilmiştir. Derinlikteki artışla birlikte korumalıişleme yöntemleri altındaki agregatlarda bulunan toplam karbon değerleri azalmıştır.Her iki derinlikte (0-15 cm ve 15-30 cm) ve bütün agregat boyutlarında (>4.0mm, 4.0-2.0 mm, 2.0-1.0 mm ve 1.0-0.5 mm) en yüksek toplam azot değerleri ATİ-1işleme yöntemi altında belirlenmiştir. Korumalı işleme yöntemleri, gelenekselişleme yöntemlerine kıyasla agregatlar içerisinde toplam karbonun bağlanmasındaönemli iyileşmeler sağladığı belirlenmiştir. ATİ-1 hariç diğer korumalı işlemeyöntemlerinde (STİ, ASTİ ve ATİ-2) geleneksel işlemelere göre daha düşük toplamazot değerleri belirlenmiştir.

Agregat Korumalı işleme Sıfır işleme Toplam azot Toplam karbon

Aggregate Conservation tillage No-till Total nitrogen Total carbon

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