Vermikompostun Farklı Tekstürlü Toprakların Agregat Stabilitesi, Hacim Ağırlığı ve Bazı Kimyasal Özelliklerine Etkisi

Abstract

Bu çalışmada, organik bir gübre olan vermikompostun farklı tekstüre sahip iki toprağın bazı fiziksel ve kimyasal özellikleri üzerine etkisi araştırılmıştır. Deneme, 2 toprak tipi, 5 vermikompost dozu ve 3 tekerrür olmak üzere toplam 30 saksıdan oluşmaktadır. Kuru ağırlık üzerinden hesaplanan vermikompost dozları 5 kg’lık saksılara uygulanmış toprak-vermikompost karışımları laboratuvar koşullarında yaklaşık 90 gün inkübasyona bırakılmışlardır. Analiz sonuçlarına göre vermikompost uygulaması her iki toprak tipinde de organik madde miktarını, pH, elektriksel iletkenlik (EC) ve katyon değişim kapasitesi (KDK) değerlerini önemli düzeyde arttırmıştır. Toprakların pH değerleri asit karakterli olan tınlı topraklarda yükselmiş, nispeten yüksek pH ya sahip killi topraklarda düşmüştür. Yüksek organik madde içeriğine sahip olması nedeni ile vermikompost toprakların KDK içeriklerini önemli düzeyde arttırmıştır. Toprakların organik madde miktarları ile CEC değerleri arasında pozitif ve önemli korelasyon bulunmuştur. Vermikompost toprakların fiziksel özelliklerini de olumlu etkilemiş ve agregat stabilitesini arttırırken hacim ağırlığını düşürmüştür. Vermikompost agregat stabilitesini tınlı toprak tipinde önemli düzeyde arttırırken, killi toprak tipinde etkisi belirgin bulunmamıştır. 

Keywords

• Vermikompost,toprak tekstürü,killi toprak,aggregat stabilitesi,hacim ağırlığı

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

Abstract

This study was conducted to investigate the effects of vermicompost treatments on physical and chemical characteristics of two soils with different textures. Experiment was conducted in 30 pots with two different soil types, 5 vermicompost doses and 3 replications. Vermicompost doses were placed into 5 kg pots in dry bases and soil-vermicompost mixtures were incubated under laboratory conditions for about 90 days. Vermicompost treatments had significant effects on organic matter content, pH, electrical conductivity (EC) and cation exchange capacity (CEC) of both soils. Increasing organic matter contents and salinity values were observed with increasing vermicompost doses. As compared to the control treatment, soil salinity greatly increased with the greatest vermicompost dose (16 t da^-1). With vermicompost treatments, pH of acidic loamy soils increased and pH of clay soils with relatively high pH levels decreased. Since vermicompost has high organic matter content, it increased soil CEC values significantly. 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 (AS) and decreased bulk density (BD) of the soils. While vermicompost treatments increased aggregate stability of loamy soils remarkably, such effects were not remarkable in clay soils. 

Keywords

• Vermicompost,soil texture,clay soil,aggregate stability,bulk density

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