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Title: | Perbandingan Nitrogen Tercuci dalam Empat Jenis Urea |
Other Titles: | Comparison of Leached Nitrogen in Four Types of Urea |
Authors: | Nugroho, Budi Sutandi, Atang Abdat, Rifat |
Issue Date: | 4-Jan-2022 |
Publisher: | IPB University |
Abstract: | Penggunaan pupuk urea yang tidak tepat menyebabkan rendahnya
efisiensi nitrogen oleh tanaman. Modifikasi kimia molekul urea dengan senyawa
formaldehid dapat dilakukan untuk mengontrol pelepasan NH4+ dan NO3− dari
urea. Uji inkubasi dan pencucian tanah dilakukan untuk mengetahui kelarutan N
urea termodifikasi formaldehid (urea granular dan prill), dan urea konvensional
(urea kujang dan urea pusri) sebagai perlakuan pembanding. Campuran Latosol
dan pasir kuarsa dengan perbandingan (1:1) diinkubasi, kemudian dicuci pada
hari ke 7, 14, 28, 45, 60 dan 90 dengan melewatkan air di kolom tanah. Hasil
pengujian menunjukkan bahwa transformasi urea dalam tanah dimulai dari
pelarutan menjadi NH4+, kemudian teroksidasi menjadi NO3-. Proses tersebut
berlaku sama untuk semua jenis urea yang diuji. Urea yang dimodifikasi
formaldehid melepaskan nitrogen dalam periode waktu yang lebih lama daripada
urea konvensional. Kadar formaldehid mempengaruhi laju pelepasan N. Urea
granular (0,5% formaldehid) menghasilkan N tercuci lebih rendah daripada urea
prill (0,1% formaldehid) tetapi tidak berbeda nyata. Kadar N-NO3- tecuci
kumulatif dari urea granular dan urea prill tidak berbeda dengan urea
konvensional. Urea granul memiliki kandungan N-NH4+ tercuci kumulatif yang
jauh lebih rendah daripada urea konvensional. Sedangkan kadar N-NH4+ tercuci
kumulatif pada perlakuan urea prill tidak berbeda nyata dengan perlakuan urea
konvensional (Kujang dan Pusri urea). Improper use of urea fertilizer causes low nitrogen efficiency by plants. Chemicalmodification of urea molecules with formaldehyde compounds can be carried out to control the release of NH4+ and NO − from urea. Incubation and soil washing tests were carried out to determine the solubility of formaldehydemodified N urea (granular and prill urea), and conventional urea (kujang urea and pusri urea) as comparison treatments.The mixture of latosol and quartz sand in the ratio (1:1) was incubated, then washed on days 7, 14, 28, 45, 60 and 90 by passing water in the soil column. The test results show that the transformation of urea in the soil starts from dissolving into NH4+, then oxidizes to NO3-. The process applies equally to all types of urea tested. Formaldehyde-modified urea releases nitrogen over a longer period of time than conventional urea. The level of formaldehyde affects the rate of N release. Granular urea (0.5% formaldehyde) produceslower leached N than prill urea (0.1% formaldehyde) but not significantly different. Thecumulative leached N-NO3- levels of granular urea and prill urea were not different fromthat of conventional urea. Granulated urea has a significantly lower cumulative leached N-NH4+ content than conventional urea. Meanwhile, the cumulative levels of N-NH4+ leachated in the prill urea treatment were not significantly different from the conventional urea treatment (Kujang and Pusri urea). |
URI: | http://repository.ipb.ac.id/handle/123456789/110481 |
Appears in Collections: | UT - Soil Science and Land Resources |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Cover.pdf Restricted Access | Cover | 426.5 kB | Adobe PDF | View/Open |
Watermark - SKRIPSI - (A14160070) RIFAT ABDAT.pdf Restricted Access | Fullteks | 646.21 kB | Adobe PDF | View/Open |
Lampiran.pdf Restricted Access | Lampiran | 486.07 kB | Adobe PDF | View/Open |
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