Kumlu Tın Bünyeli Bir Toprağın C ve N-Dinamiği Üzerine Ham ve Arıtılmış Zeytin Karasuyunun Etkileri

Yıl 2018, , 25 - 32, 30.06.2018

Onur Bayız Nur Okur

https://doi.org/10.25308/aduziraat.336073

Öz

Zeytin karasuyu,
yüksek kirlilik yükü ve içerdiği polifenollerden
dolayı fitotoksik etkilere sahip fakat bununla beraber
organik bileşikler ve bitki besin
elementleri yönünden de zengin bir atık su özelliğindedir. Bu nedenle belli düzeyde bir arıtımdan geçtikten
sonra toprak ıslah maddesi olarak
kullanılabilme potansiyeli bulunmaktadır. Bu çalışmada; zeytinyağı üretimi sırasında ortaya çıkan
ham karasu ve iki farklı yöntem (ekonomik ön arıtma ve ileri arıtma tekniği) ile arıtılmış karasu kumlu tın bünyeli bir toprağa 50, 100 ve 150 m³ ha^-1
dozlarında uygulanmış
ve toprağın C ve N-dinamiği ile bazı kimyasal özelliklerinde
meydana getirdiği değişimler incelenmiştir.  Deneme laboratuvar koşullarında 90 günlük bir
inkübasyon denemesi olarak yürütülmüştür. Gerek arıtılmış ve gerekse
arıtılmamış zeytin karasu uygulamaları toprağın toplam organik-C
(TOC), toplam N (TON), çözünebilir-C (ÇÖZ-C),
mikrobiyal biyokütle-C ve-N (MB-C ve MB-N),
alınabilir P ve K miktarlarını artırmış fakat N-immobilizasyonundan dolayı
inorganik-N (İNOR-N) havuzunu küçültmüştür. En yüksek MB-C/TOC, ÇÖZ-C/TOC
ve MB-N/TON oranları karasu uygulamalarının ilk dozlarında, en yüksek
İNOR-N/TON oranları
ise, kontrol ve en yüksek ham karasu uygulamalarında saptanmıştır. Bu sonuçlar
karasuyun 50 ve 100 m³ ha^-1 uygulamalarında topraktaki
mikrobiyal biyokütlenin arttığını fakat 150 m³ ha^-1 karasu
uygulamasında topraktaki C ve
N-dinamiğinin olumsuz etkilendiğini ortaya çıkarmıştır.
Fenol ve organik C yükünün azaltıldığı arıtılmış karasuların100
m³ ha^-1’ı geçmeyecek dozlardaki uygulamalarının bu atığın değerlendirilmesinde
iyi bir geri dönüşüm stratejisi olabileceği düşünülmektedir.

Anahtar Kelimeler

mikrobiyal biyokütle, toprağın C ve N-dinamiği, zeytin karasuyu

The Effects of Treated and Untreated Oil Mill Wastewater on C and N-Dynamics of a Sandy Loam Soil

Öz

Olive
mill wastewater (OMW) is characterized by high pollutant load and phytotoxic
levels of polyphenols, but also a high amount of organic compounds and plant
mineral nutrients. For this reason, there is a potential to be used as a
material improving soil after treated. 
In this study, OMW treated with two different treatment processes
(economic pre-treatment and advanced treatment process) and untreated OMW were
applied to a sandy loam texture soil at the rates of 0, 50, 100, 150 m³
ha^-1 and the changes in C-and N-dynamics of soil and some chemical
properties were determined.  The
experiment was carried out in total period of 90 days of incubation under
laboratory conditions. Amendment with untreated and treated wastewaters
increased the contents of total organic C (TOC), total N (TON),  soluble- C (SOL-C), microbial biomass-C and N
(MB-C and MB-N)  and available P and K,
but inorganic-N (INOR-N) pool decreased due to N-immobilization. The highest
the ratios of MB-C/TOC, SOL-C/TOC and MB-N/TON were determined at the low OMW
rates and the highest INOR-N/TON at the control and highest untreated OMW rate.  These results showed that microbial biomass
increased at 50 and 100 m³ ha^-1 OMW rates but C-and
N-dynamics of soil negatively were affected by 150 m³ ha^-1
OMW applications. The fact that OMW that are minimized phenol and organic C
load are applied to soils at not exceeding 100 m³ ha^-1
rate may be considered to be a good strategy for recycling this waste. 

Anahtar Kelimeler

microbial biomass, C- and N dynamics of soil, olive mill wastewater

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