A. YALÇIN TEPE

Sodyum nitrat uygulamasının toprak havuzlardaki taban sedimentlerine etkileri

Bu çalışma toprak havuzlarda azot gübrelerinin, havuz taban toprağına potansiyel etkileri belirlemek amacıyla yapılmış ve toprak solunum çemberlerinin kullanıldığı laboratuvar çalışmalarıyla değerlendirilmiştir. Çalışma için dört ayrı toprak havuzun üst 5 cm’lik toprak tabakasından örnekler toplanmıştır. Sodyum nitrat uygulanmış her toprak segmentindeki mikrobiyel ayrışma bir solunum çemberi içerisinde ölçülmüştür. Çemberler 25°C de, karanlıkta kuluçka edilmiş ve 1, 2, 4, 8, 12, 16, 20, 24, 28, 32, 36, 46. günlerdeki solunumu ölçülmüştür. Sodyum nitrat uygulanmış ve uygulanmamış topraklar arasında toprak solunumları açısından istatistiki bir fark bulunamamıştır (p

Anahtar Kelimeler:

gölet, azotlu gübreler, sodyum nitrat, balık havuzu toprağı, çökelti

Effects of sodium nitrate enrichment on bottom sediments in earthen ponds

The potential influence of nitrogen fertilization on respiration of pond bottom soil was evaluated in laboratory studies using soil respiration chambers. Sample from the upper 5 cm sediment layer of four freshwater ponds were collected. Microbial decomposition of each soil segment was measured inside a respiration chamber inoculated with Sodium Nitrate. Chambers were incubated in the dark at 25°C and respiration was measured after 1, 2, 4, 8, 12, 16, 20, 24, 28, 32, 36, 46 days. No significant differences (p<0.05) in soil respiration was found among sodium nitrate treated and untreated soil. Soil respiration ranged between 6.55 mg CO2/g in sandy soil to 11.14 mg CO2/g in black soil.

Keywords:

ponds, nitrogen fertilizers, sodium nitrate, fish pond soils, sediment,

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