Kil Bünyeli Bir Arazide Toprak Strüktürü ve Nem Sabitlerinin Tütün Atığı Uygulamasıyla Değişimi
Bu çalışmada, tütün atığı (TW) uygulamasının kil bünyeli bir arazide toprak strüktürü ve su tutma kapasitesine etkisi belirlenmiştir. Tütün atığı kil bünyeli toprak yüzeyine (0-15 cm) 4 farklı oranda (% 0, 2, 4 ve 6) ve tesadüf parselleri denme deseninde üç tekrarlamalı olarak uygulanmıştır. Sekiz ay sonra, toprak organik karbon içeriği, hacim ağırlığı (BD), toplam gözeneklilik (F), gravimetrik (W) ve hacimsel (θ) su içeriği, hava dolu gözeneklilik (Fa) ve nispi doygunluk (RS) değerlerindeki değişimler belirlenmiştir. Tütün atığı uygulama oranları, killi toprağın hacim ağırlığı değerlerini önemli ölçüde düşürürken, organik C içeriği ve F değerlerini önemli ölçüde artırmıştır. Gravimetrik nem değerleri kontrole göre önemli ölçüde artmasına rağmen, TW uygulaması ile F değerlerinin artması ile θ ve RS değerleri azalmıştır. TW'nin yüksek uygulama oranlarında (%4 ve %6), devamlı solma noktası (PWP)'daki nem içeriğini tarla kapasitesi (FC)'ne göre daha fazla arttırmıştır. Böylece daha yüksek TW oranlarındaki yarayışlı nem (AWC) değerleri, %2 TW dozu ve kontrol uygulamalarındaki AWC değerlerinden daha düşük olmuştur. Özellikle killi topraklarda Fa'nın artışı bitki kök solunumu ve mikrobiyal aktivite için önemlidir. Yüksek TW oranları, F değerlerini artırmış, ancak kontrol muamelesine göre killi toprağın AWC'sini azaltmıştır.
Anahtar Kelimeler:
Tütün atığı, kil bünyeli toprak, tarla kapasitesi, solma noktası, nispi doygunluk
Soil Structure and Moisture Constants Changed by Tobacco Waste Application in a Clay Textured Field
In this study, effect of tobacco waste (TW) application on soil structural parameters and water holding capacity were determined in a clay field. Tobacco waste was applied into a clay soil surface (0 - 15 cm) with 4 different rates (0, 2, 4 and 6%) and three replications in a randomized plot design. After eight months, changes in soil organic carbon content, bulk density (BD), total porosity (F), gravimetric (W) and volumetric (θ) water content, air filled porosity (Fa) and relative saturation (RS) values were determined in clay soil for each treatment. TW application rates significantly increased organic C contents and F values while they significantly decreased bulk density values of the clay soil. Although the W values significantly increased over the control, the θ and RS values decreased with increasing the F values by the application of TW. The high application rates of TW (4 and 6%) increased moisture content at permanent wilting point (PWP) more than at field capacity (FC). Thus, AWC values in higher rates of TW were lower than the AWC values in 2% rate of TW and control treatments. Increasing Fa is important for plant root respiration and microbial activity especially in the clay soils. The high rates of TW increased F values but decreased the AWC of clay soil over the control treatment.
Keywords:
Tobacco waste clay soil, structure, field capacity, wilting point, relative saturation,
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- ISSN: 2146-7072
- Yayın Aralığı: Yılda 2 Sayı
- Yayıncı: Toprak Gübre ve Su Kaynakları Merkez Araştırma Enstitüsü
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Kil Bünyeli Bir Arazide Toprak Strüktürü ve Nem Sabitlerinin Tütün Atığı Uygulamasıyla Değişimi