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Improving ammonium and nitrate release from urea using clinoptilolite zeolite and compost produced from agricultural wastes.

Omar L, Ahmed OH, Ab Majid NM - ScientificWorldJournal (2015)

Bottom Line: Ammonium and NO3 (-) leaching losses during the 30 days of the leaching experiment were highest in urea alone compared with urea with clinoptilolite zeolite and compost treatments.At 30 days of the leaching experiment, NH4 (+) retention in soil with urea amended with clinoptilolite zeolite and compost was better than that with urea alone.Urea can be amended with clinoptilolite zeolite and compost to improve NH4 (+) and NO3 (-) release from urea.

View Article: PubMed Central - PubMed

Affiliation: Department of Crop Science, Faculty of Agriculture and Food Sciences, Universiti Putra Malaysia, Bintulu Sarawak Campus, 97008 Bintulu, Sarawak, Malaysia.

ABSTRACT
Improper use of urea may cause environmental pollution through NH3 volatilization and NO3 (-) leaching from urea. Clinoptilolite zeolite and compost could be used to control N loss from urea by controlling NH4 (+) and NO3 (-) release from urea. Soil incubation and leaching experiments were conducted to determine the effects of clinoptilolite zeolite and compost on controlling NH4 (+) and NO3 (-) losses from urea. Bekenu Series soil (Typic Paleudults) was incubated for 30, 60, and 90 days. A soil leaching experiment was conducted for 30 days. Urea amended with clinoptilolite zeolite and compost significantly reduced NH4 (+) and NO3 (-) release from urea (soil incubation study) compared with urea alone, thus reducing leaching of these ions. Ammonium and NO3 (-) leaching losses during the 30 days of the leaching experiment were highest in urea alone compared with urea with clinoptilolite zeolite and compost treatments. At 30 days of the leaching experiment, NH4 (+) retention in soil with urea amended with clinoptilolite zeolite and compost was better than that with urea alone. These observations were because of the high pH, CEC, and other chemical properties of clinoptilolite zeolite and compost. Urea can be amended with clinoptilolite zeolite and compost to improve NH4 (+) and NO3 (-) release from urea.

No MeSH data available.


Ammonium and nitrate leached at three-day interval over 30 days of leaching for T1, T2, T3, and T4 effects only. Note. T1: 64 g soil + 7.40 g urea (no additives); T2: 64 g soil + 7.40 g urea + 6 g clinoptilolite zeolite; T3: 64 g soil + 7.40 g urea + 1.54 g compost; T4: 64 g soil + 7.40 g urea + 1.54 g compost + 6 g clinoptilolite zeolite. Note. Bar represents standard error of the mean.
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fig6: Ammonium and nitrate leached at three-day interval over 30 days of leaching for T1, T2, T3, and T4 effects only. Note. T1: 64 g soil + 7.40 g urea (no additives); T2: 64 g soil + 7.40 g urea + 6 g clinoptilolite zeolite; T3: 64 g soil + 7.40 g urea + 1.54 g compost; T4: 64 g soil + 7.40 g urea + 1.54 g compost + 6 g clinoptilolite zeolite. Note. Bar represents standard error of the mean.

Mentions: For T3 and T4, leaching of NH4+ and NO3− was reduced (Figures 5(a) and 5(b)) because of the affinity of the functional groups such as carboxyl and phenolic in the compost for NH4+ and NO3−. An evidence of this is the high contents of these functional groups of the humic acid (Table 4). The striking effects of urea amended with clinoptilolite zeolite and compost (T2, T3, and T4) on leaching of NH4+ and NO3− compared with urea alone (T1) are clearly demonstrated in Figures 6(a) and 6(b) whereby the contribution of T0 (soil alone) was deducted from those of T1, T2, T3, and T4 over the 30 days of leaching experiment (i.e., leaching losses of NH4+ and NO3− from T1, T2, T3, and T4 only).


Improving ammonium and nitrate release from urea using clinoptilolite zeolite and compost produced from agricultural wastes.

Omar L, Ahmed OH, Ab Majid NM - ScientificWorldJournal (2015)

Ammonium and nitrate leached at three-day interval over 30 days of leaching for T1, T2, T3, and T4 effects only. Note. T1: 64 g soil + 7.40 g urea (no additives); T2: 64 g soil + 7.40 g urea + 6 g clinoptilolite zeolite; T3: 64 g soil + 7.40 g urea + 1.54 g compost; T4: 64 g soil + 7.40 g urea + 1.54 g compost + 6 g clinoptilolite zeolite. Note. Bar represents standard error of the mean.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4352482&req=5

fig6: Ammonium and nitrate leached at three-day interval over 30 days of leaching for T1, T2, T3, and T4 effects only. Note. T1: 64 g soil + 7.40 g urea (no additives); T2: 64 g soil + 7.40 g urea + 6 g clinoptilolite zeolite; T3: 64 g soil + 7.40 g urea + 1.54 g compost; T4: 64 g soil + 7.40 g urea + 1.54 g compost + 6 g clinoptilolite zeolite. Note. Bar represents standard error of the mean.
Mentions: For T3 and T4, leaching of NH4+ and NO3− was reduced (Figures 5(a) and 5(b)) because of the affinity of the functional groups such as carboxyl and phenolic in the compost for NH4+ and NO3−. An evidence of this is the high contents of these functional groups of the humic acid (Table 4). The striking effects of urea amended with clinoptilolite zeolite and compost (T2, T3, and T4) on leaching of NH4+ and NO3− compared with urea alone (T1) are clearly demonstrated in Figures 6(a) and 6(b) whereby the contribution of T0 (soil alone) was deducted from those of T1, T2, T3, and T4 over the 30 days of leaching experiment (i.e., leaching losses of NH4+ and NO3− from T1, T2, T3, and T4 only).

Bottom Line: Ammonium and NO3 (-) leaching losses during the 30 days of the leaching experiment were highest in urea alone compared with urea with clinoptilolite zeolite and compost treatments.At 30 days of the leaching experiment, NH4 (+) retention in soil with urea amended with clinoptilolite zeolite and compost was better than that with urea alone.Urea can be amended with clinoptilolite zeolite and compost to improve NH4 (+) and NO3 (-) release from urea.

View Article: PubMed Central - PubMed

Affiliation: Department of Crop Science, Faculty of Agriculture and Food Sciences, Universiti Putra Malaysia, Bintulu Sarawak Campus, 97008 Bintulu, Sarawak, Malaysia.

ABSTRACT
Improper use of urea may cause environmental pollution through NH3 volatilization and NO3 (-) leaching from urea. Clinoptilolite zeolite and compost could be used to control N loss from urea by controlling NH4 (+) and NO3 (-) release from urea. Soil incubation and leaching experiments were conducted to determine the effects of clinoptilolite zeolite and compost on controlling NH4 (+) and NO3 (-) losses from urea. Bekenu Series soil (Typic Paleudults) was incubated for 30, 60, and 90 days. A soil leaching experiment was conducted for 30 days. Urea amended with clinoptilolite zeolite and compost significantly reduced NH4 (+) and NO3 (-) release from urea (soil incubation study) compared with urea alone, thus reducing leaching of these ions. Ammonium and NO3 (-) leaching losses during the 30 days of the leaching experiment were highest in urea alone compared with urea with clinoptilolite zeolite and compost treatments. At 30 days of the leaching experiment, NH4 (+) retention in soil with urea amended with clinoptilolite zeolite and compost was better than that with urea alone. These observations were because of the high pH, CEC, and other chemical properties of clinoptilolite zeolite and compost. Urea can be amended with clinoptilolite zeolite and compost to improve NH4 (+) and NO3 (-) release from urea.

No MeSH data available.