Üre uygulamasının topraklarda amonyum ve nitrat oluşumuna etkisi
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Dosyalar
Tarih
2007
Dergi Başlığı
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Cilt Başlığı
Yayıncı
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Bu araştırma, Tekirdağ İlinden alınan farklı fiziksel ve kimyasal özelliklere sahip 20 adet toprağa uygulanan ürenin topraklardaki nitrat-N'u ve amonyum-N'u oluşumuna etkisini belirlemek amacıyla laboratuarda yürütülmüştür. İnkübasyon denemesinde toprağa 500 mg kg"1 N üre formunda çözelti şeklinde uygulanmış ve 28 gün inkübasyona bırakılmıştır. İnkübasyonun Î.(G1), 7.(G2), Î4.(G3) ve 28.(G4) günlerinde alınan toprak örneklerindeki amonyum-N ve nitrat-N belirlenmiştir. İnkübasyon denemesi sonunda, topraklardaki toplam mineral azot miktarı saptanmış ve daha sonra toprağa uygulanan üre azotunun dönüşümleri oransal olarak hesaplanmıştır. Toprakların amonyum azotu miktarları inkübasyon süresine bağlı olarak 7. güne kadar artmış, 14. ve 28. günlerde ise azalmıştır. Toprakların nitrat azotu miktarları da 7. güne kadar artmış, daha sonraki günlerde çok fazla değişmemiştir. Denemenin 1. gününde oluşan üre dönüşüm oranı (UTR) ile toprakların pH, Ca++, K+ ve kil kapsamları arasında negatif yönde önemli ilişkiler (sırasıyla r=M).359*, r=M),360*, r=~0.361* ve r= -0.513**) saptanmıştır. Denemenin 7. gününde oluşan üre dönüşüm oranı (UTR) ile toprakların pH ve kil kapsamları arasında negatif yönde önemli ilişkiler (sırasıyla r=M).346* ve r=M).350*) saptanırken, kum miktarları ile r=0.428** düzeyinde pozitif bir ilişki belirlenmiştir. Denemenin 14. gününde ise önemli ilişkiler bulunamamıştır. Denemenin 28. gününde oluşan üre dönüşüm oranı (UTR) ile toprakların K+ kapsamları arasında r=-0.419** düzeyinde negatif bir ilişki belirlenmiştir.
This study had been made in the laboratuary with the aim to determine the effect of the urea treated to 20 physical and chemically different soils taken from the Tekirdağ province for the nitrate-N and amonium-N formation. In the incubation test 500 mg kg"1 N urea solution has been treated to the soil ve left to incubation for 28 days. The amounts of nitrate-N andy<amonium--N in the soil samples taken on the l.(Gl), 7.(G2), 14.(G3) and 28.(G4) days o fthe incubation has been determined. At the end of the incubation, total mineral nitrogen amount in the soil has been determined and then .transformation rates of the urea to the nitrogen calculated proportionally. The amount of nitrogen in the soils increased until J$e 7th day of the incubation, and decreased on the 14th and 28th days. The amount of nitrate nitrogen in the soils increased #ntil the 7th day of the incubation, and later did not changed so much. It was determined that there were significant relationships among the urea transformation rate (UTR) emerged on the first day of the test and pH, Ca*"1", K+ and clay contents of the soils (r=-0.359*, r=-O.36O*, r=~0.361* ve r= -0.513** respectively). It was determined that while there were negative relationships between the urea transformation rate (UTR) emerged on the 7th day of the test and pH, and clay contents of the soils (r=-0.346* ve r=-0.350* respectively), a positive relationship with the sand r=0.428** levels has been observed. No any significant relationship could be detected in the 14th day of the test. A negative relationships between the urea transformation rate (UTR) which emerged on the 28th day of the test and K+ content on the r =-0.419** level has been determined.
This study had been made in the laboratuary with the aim to determine the effect of the urea treated to 20 physical and chemically different soils taken from the Tekirdağ province for the nitrate-N and amonium-N formation. In the incubation test 500 mg kg"1 N urea solution has been treated to the soil ve left to incubation for 28 days. The amounts of nitrate-N andy<amonium--N in the soil samples taken on the l.(Gl), 7.(G2), 14.(G3) and 28.(G4) days o fthe incubation has been determined. At the end of the incubation, total mineral nitrogen amount in the soil has been determined and then .transformation rates of the urea to the nitrogen calculated proportionally. The amount of nitrogen in the soils increased until J$e 7th day of the incubation, and decreased on the 14th and 28th days. The amount of nitrate nitrogen in the soils increased #ntil the 7th day of the incubation, and later did not changed so much. It was determined that there were significant relationships among the urea transformation rate (UTR) emerged on the first day of the test and pH, Ca*"1", K+ and clay contents of the soils (r=-0.359*, r=-O.36O*, r=~0.361* ve r= -0.513** respectively). It was determined that while there were negative relationships between the urea transformation rate (UTR) emerged on the 7th day of the test and pH, and clay contents of the soils (r=-0.346* ve r=-0.350* respectively), a positive relationship with the sand r=0.428** levels has been observed. No any significant relationship could be detected in the 14th day of the test. A negative relationships between the urea transformation rate (UTR) which emerged on the 28th day of the test and K+ content on the r =-0.419** level has been determined.
Açıklama
Anahtar Kelimeler
Ziraat Mühendisliği, Ziraat, Toprak Bilimi, Biyoloji
Kaynak
Ondokuz Mayıs Üniversitesi Ziraat Fakültesi Dergisi (. Anadolu Tarım Bilimleri Dergisi)
WoS Q Değeri
Scopus Q Değeri
Cilt
22
Sayı
1
