Remzi İLAY, Meltem AKTAŞ, Nuri Burak ASLANTEKİN, Hasan ÖZCAN

Farklı kaynaklardan elde edilen organik materyalin kumlu tın bünyeli toprağın bazı özellikleri üzerine etkileri

Organik materyaller toprakların sürdürülebilir olmasında önemli yer tutmaktadır. Toprağa organik madde kaynağı olarak ilaveedilen birçok materyal, karbonun toprakta tutulması ve depolanması gibi doğrudan olumlu etkisinin yanında toprağın fiziksel,kimyasal ve biyolojik özelliklerini iyileştirici etkiye sahiptir. Organik toprak düzenleyici olarak en çok tercih edilen materyallerdenbiri olan leonardit; organik maddelerin kömürleşme süreçlerinden etkilenmeyerek oksitlenmesiyle oluşan ve humik asitçe zengindoğal bir materyaldir. Humik asitçe zengin olması ve yüksek karbon içeriği, toprak ıslahı ve bitkisel üretim açısından önemli bir yertutmaktadır. Bu çalışma, Kayseri-Develi (DL) ve Çanakkale-Yenice (YL) olmak üzere iki farklı bölgeden temin edilen leonarditinkumlu tın (SL) bünyeye sahip toprağın bazı özeliklerine kısa süreli etkilerini tespit etmek amacıyla yapılmıştır. Bu amaçla leonarditçeşitleri beş farklı dozda (%4, %8, %12, %16, %20) kumlu tın (SL) bünyeye sahip toprak ile karıştırılarak üç ay inkübe edilmiştir.İnkübasyon süresi sonunda tüm uygulamalar için toprağın organik maddesi (OM), toprak reaksiyonu (pH), elektriksel iletkenliği(EC), kireç içeriği (CaCO3), kuru hacim ağırlığı (dB), hidrolik iletkenliği (Ks), agregat stabilitesi (AS) ve boşluk hacmi (P) gibiözellikleri belirlenerek leonarditlerin etkisi araştırılmıştır. Uygulanan dozlara bakılmaksızın her iki leonardit uygulamasıylakontrole göre EC (%236), OM (%213), AS (%50), P (%11) artarken, dB (%10) azalmıştır (p≤0.05). Buna rağmen diğerparametrelerdeki değişimler (pH, CaCO3, Ks) istatistiksel olarak önemsiz bulunmuştur (p≥0.05). Genel olarak leonardit çeşidininincelenen parametreler üzerine etkisinin önemsiz (p≥0.05) olduğu tespit edilmiştir.

Anahtar Kelimeler:

Leonardit, Toprak, Agregat Stabilitesi, Organik Madde, Porozite

The effects of organic materials obtained from different sources on some properties of sandy loam soil

The addition of organic materials to the soil is important due to the sustainability of soil resources and their positive contribution tosoil properties. Many materials that are added to the soil as a source of organic matter have direct positive effects, such as storingand storing carbon in the soil, as well as improving the physical, chemical and biological properties of the soil. Leonardite is one ofthe most preferred organic soil conditioner, which is rich in humic acid and formed by oxidizing organic materials without beingaffected by carbonization processes. Due to having high humic acid and carbon content, it has an important place in terms of soilimprovement and vegetative production. This study was carried out to determine the short-term effects of leonardite obtained fromtwo different sources ((Kayseri-Develi (DL) and Çanakkale-Yenice (YL)) on some properties of the soil with sandy loam (SL). Forthis purpose, each leonardite type was mixed with sandy loam (SL) soil at the rate of five different doses (4%, 8%, 12%, 16%, 20%)and they were incubated for three months. Soil organic matter (OM), soil reaction (pH), electrical conductivity (EC), lime content(CaCO3), bulk density (dB), saturated hydraulic conductivity (Ks), aggregate stability (AS) and total porosity (P) of mixtures weredetermined at the end of the incubation period to investigate the effects of leonardite. Leonardite applications increased EC (236%),OM (213%), AS (50%) and P (11%) while decreased dB (10%) compared to control (p≤0.05). However, changes in otherparameters (pH, CaCO3, Ks) were not found significant statistically (p≥ 0.05). In general, it was determined that the effect of theleonardite type on the parameters investigated was not significant (p≥ 0.05).

Keywords:

Leonardite, soil, aggregate stability, organic matter, porosity,

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