Solucan Gübresi'nin Agrega Stabilitesi, Yığın Yoğunluğu ve Bazı Kimyasallar Üzerindeki Etkileri Farklı Dokulara Sahip Zeminlerin Özellikleri

Bu çalışmada, organik bir gübre olan vermikompostun farklı tekstüre sahip iki toprağın bazı fiziksel ve kimyasalözellikleri üzerine etkisi araştırılmıştır. Deneme, 2 toprak tipi, 5 vermikompost dozu (0, 20, 40, 80, 160 t ha-1 ) ve3 tekerrür olmak üzere toplam 30 saksıdan oluşmaktadır. Kuru ağırlık üzerinden hesaplanan vermikompost dozları5 kg’lık saksılara uygulanmış toprak-vermikompost karışımları laboratuvar koşullarında yaklaşık 90 güninkübasyona bırakılmışlardır. Analiz sonuçlarına göre vermikompost uygulaması her iki toprak tipinde de organikmadde miktarını, pH, EC, katyon değişim kapasitesi (CEC) değerlerini önemli düzeyde arttırmıştır. Topraklarafarklı dozlarda ilave edilen vermikompost her iki toprak çeşidinde de organik madde miktarını ve tuz içeriklerinidozlara paralel olarak arttırmıştır. Toprakların tuzluluğu en yüksek doz olan 16 t da-1 kompost dozunda kontroldozuna göre oldukça yüksek artış göstermiştir. Toprakların pH değerleri asit karakterli olan tınlı topraklardayükselmiş, nispeten yüksek pH ya sahip killi topraklarda düşmüştür. Yüksek organik madde içeriğine sahip olmasınedeni ile vermikompost toprakların CEC içeriklerini önemli düzeyde arttırmıştır. Toprakların organik maddemiktarları ile CEC değerleri arasında pozitif ve önemli korelasyon bulunmuştur. Vermikompost topraklarınfiziksel özelliklerini de olumlu etkilemiş ve agregat stabilitesini arttırırken hacim ağırlığını düşürmüştür.

Effects of Vermicompost on Aggregate Stability, Bulk Density and Some ChemicalCharacteristics of Soils with Different Textures

This study was conducted to investigate the effects of vermicompost treatments on some physical and chemical characteristics of two soils with different textures. Experiment was conducted in 30 pots with 2 soil types, 5 vermicompost doses (0, 20, 40, 80, 160 t ha-1) and 3 replications. Vermicompost doses calculated over dry weights were applied to 5 kg pots and soil-vermicompost mixtures were incubated under laboratory conditions for about 90 days. According to analysis results, vermicompost treatments significantly increased organic matter content, pH, EC and cation exchange capacity (CEC) values of both soil types. Vermicompost applied at different doses increased organic matter and salt contents of both soil types parallel to increasing doses. As compared to the control dose, soil salinity greatly increased with the greatest vermicompost dose (16 t da-1). Soil pH values increased in acidic loamy soils and decreased in clay soils with relatively high pH values. Since vermicompost has high organic matter content, it increased soil CEC values significantly. It was found that there were significant positive correlations between organic matter content and CEC values of the soils. Vermicompost treatments had positive effects also on soil physical characteristics, increased aggregate stability and decreased bulk density of the soils. While vermicompost treatments increased aggregate stability of loamy soils remarkably, such effects were not remarkable in clay soils.

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