- Atatürk Üniversitesi Ziraat Fakültesi Dergisi
- Vol: 4 Issue: 2
- ALKALİN VE ASİT TOPRAKLARDAN ALINAN NaHCO3 VE BRAY-2 EKSTRAKTLARINDA İKİ AYRI KOLOİMETRİK METODLA TA...
ALKALİN VE ASİT TOPRAKLARDAN ALINAN NaHCO3 VE BRAY-2 EKSTRAKTLARINDA İKİ AYRI KOLOİMETRİK METODLA TAYİN EDİLEN FOSFOR Mİ.I{TARLARININ MUKAYESESİ ÜZERİNE BİR ARAŞTIRMA
Authors : Fethi Bayrakli
Pages : 0-0
View : 8 | Download : 3
Publication Date : 2010-12-12
Article Type : Research
Abstract :ÖZET Bu çalışmada; reaksiyonlarz farklı (Alka/in-Asiı) topraklardan NaHC0 3 (0.5 M, pH=8.5) ve Bray-2 (0.1 N HCl +0.03 N NH4F) çözeltileriyle ekstrakte edilmiş olan fosforun; molibdo-fosforik mavi renk esasına göre iki ayıfosfor tayin metodu (HCl-Sn ve HıS04 - As korbik asit) ile bulunan miktarlarz birbirıeri ile mukayese edilmiş, aralarandaki ilgi derecesi hesaplanmış ve uygulaması daha basit ve seri olan Sülfirik asit-Askorbik asit metodunun HCl-Sn metodu yerine ikame edilme imkanı araştırılmıştır. Netice olarak; adı geçen iki metod arasında NaHC0 3 ve Bray-2 ekstrakılarında % 1 seviyesinde önemli (r=0.976 ve r=0.998) müsbet ilgi tesbit edilmiş ve Sülfirik asit-Askorbik asit metodunun kolorimetrik fosfor tayininde HCl-Sn metodu yerine kullanılabileceği neticesine varılmıştır. An lnvestigation On The Applications Of Two Different Colorimetric Methods For Phosphorus Determination Using NaHCO3 And Bray-2 Extracts From Alkaline And Acid Soil. Using acid and alkali soils, we have tasted two different colonmetric methods for determining inorganic' phosphorus in NaHCO 3 and Bray- 2 extracts. The soils Wihch were used in this experiment were coIlected from Erzincan and Bayburt valiey alsa Rize Region. Rize soils were acid, Erzincan and Bayburt soils were alkaline in reaction. The Olsen's 0.5 M NaHCO3 at pH 8.5 eqtraction meth~ct'were applied to six Rize and six Bayburt soils while ten surface soils each regions were extracted according to the Bray- 2 (O. IN HCl + 0.03N NH4F) Molybdophosphoric blue method in hydrochloric acid system Jackson (1958) and H ıS0 4- Ascorbic acid method John (1970) have been used ın all soil extracts. it has been found that the both colonmetric methods gave positif correlation with the extractants at the level of 1 %' However there was no differences between the values obtained by these colorimetric methods but the H ıSO 4Ascorbic acid procedure was simple to operate and more reproducible.Keywords :