TY  - GEN
CY  - UNIVERSITAS LAMPUNG
ID  - eprints75322
UR  - http://digilib.unila.ac.id/75322/
A1  - Dimas, Arianto Nugroho
Y1  - 2023/07/03/
N2  - Metode-metode penetapan fosfor (P) seperti P tersedia (Bray I) dan P Potensial
(HCl 25%) berlangsung satu kali pengekstrakan hal ini mengacu pada reaksi
kesetimbangan, sedangkan proses tanaman mengambil P di koloid dilakukan terusmenerus
tidak
hanya
satu
kali.
Selain
uji
kesetimbangan
terdapat
uji
kinetika
untuk

mengetahui
pelepasan
P
tersedia
dari
koloid
tanah
berdasarkan
waktu
yang
sesuai

tanaman

menyerap P. Contoh tanah diambi dari lapisan bawah tanah di kebun
percobaan FP Universitas Lampung di Kecamatan Natar, Lampung Selatan.
Penelitian menggunakan 5 perlakuan yaitu; T = Tanah, TF = Tanah+FeCl3, TK =
Tanah+Konkresi Besi, TFO = Tanah+FeCl3+Bahan Organik, dan TKO =
Tanah+Konkresi Besi+Bahan Organik. Analisis laboratorium yang digunakan
adalah analisis P tersedia (Bray I) dan P potensial (HCl 25%) pada saat
kesetimbangan dan kinetika. Hasil penelitian menunjukkan hasil kumulatif
ekstraksi P lebih banyak pada saat kinetika dibandingkan saat kesetimbangan.
Perlakuan TKO memiliki kumulatif P tersedia dan konstanta kecepatan P tersedia
yang terlepas dari koloid paling tinggi baik secara keseluruhan, laju cepat (k1), dan
laju lambat (k2).

Kata kunci : Kinetika, Konkesi besi, P tersedia, P terekstrak, Bahan organik, Ion Fe
Phosphorus (P) determination methods such as available P (Bray I) and P Potential
(HCl 25%) take place one time extraction, this refers to an equilibrium reaction 
whereas the process by which plants take up P in colloids is continuously carried
out, not just once. In addition to the equilibrium test, there is a kinetic test to
determine the rate of P release in soil colloids based on the appropriate time for
plants to absorb P. The soil sample was taken from the sub soil of Experimental
Garden of the FP University of Lampung in Natar District, South Lampung. The
study used 5 treatments, namely: T = Soil, TF = Soil+FeCl3, TK = Soil+Iron
Concretions, TFO = Soil+FeCl3+Organic Matter, and TKO = Soil+Iron
Concretions+Organic Matter, the laboratory analysis used was analysis Available
P (Bray I) and P potential (HCl 25%) at equilibrium and kinetics. The results
showed that the cumulative yield of P extraction was higher at kinetics than at
equilibrium. The TKO treatment had a cumulative available P and available P
velocity constant regardless of the highest overall colloid, fast rate (k1), and slow
rate (k2). 

Keywords : Kinetics, Iron concretion, available P, P extracted, Organic matter, 
                     Fe ion
PB  - FAKULTAS PERTANIAN
TI  - KINETIKA PELEPASAN FOSFOR PADA TANAH ULTISOL NATAR 
AKIBAT PERLAKUAN BESI KLORIDA (FeCl3), KONKRESI BESI, DAN
BAHAN ORGANIK

AV  - restricted
ER  -