Limits...
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.


(a) Total nitrogen retained in soil at 30 days of leaching and (b) total nitrogen retained in soil after 30 days of leaching (after subtracting the contribution of T0). Note. T0: 64 g soil (no urea); 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. Means with different letters indicate significant difference between treatments by Tukey's test at P ≤ 0.05. Note. Bar represents standard error of the mean.
© Copyright Policy - open-access
Related In: Results  -  Collection


getmorefigures.php?uid=PMC4352482&req=5

fig9: (a) Total nitrogen retained in soil at 30 days of leaching and (b) total nitrogen retained in soil after 30 days of leaching (after subtracting the contribution of T0). Note. T0: 64 g soil (no urea); 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. Means with different letters indicate significant difference between treatments by Tukey's test at P ≤ 0.05. Note. Bar represents standard error of the mean.

Mentions: The soil total N after the leaching experiment without subtracting the contribution of T0 from T1, T2, T3, and T4 is shown in Figure 9(a) and after subtracting the contribution of T0 is presented in Figure 9(b). The higher concentrations of soil total N in T2, T3, and T4 (urea with clinoptilolite zeolite and compost) than in T1 suggest that both clinoptilolite zeolite and compost ensured slow release of urea-N. For T1 (urea alone), retention of total N was lower compared with urea with clinoptilolite zeolite and compost (T2, T3, and T4) because N was lost due to leaching of NH4+ and NO3− as discussed previously in Figures 5, 6, 7, and 8.


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)

(a) Total nitrogen retained in soil at 30 days of leaching and (b) total nitrogen retained in soil after 30 days of leaching (after subtracting the contribution of T0). Note. T0: 64 g soil (no urea); 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. Means with different letters indicate significant difference between treatments by Tukey's test at P ≤ 0.05. 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

fig9: (a) Total nitrogen retained in soil at 30 days of leaching and (b) total nitrogen retained in soil after 30 days of leaching (after subtracting the contribution of T0). Note. T0: 64 g soil (no urea); 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. Means with different letters indicate significant difference between treatments by Tukey's test at P ≤ 0.05. Note. Bar represents standard error of the mean.
Mentions: The soil total N after the leaching experiment without subtracting the contribution of T0 from T1, T2, T3, and T4 is shown in Figure 9(a) and after subtracting the contribution of T0 is presented in Figure 9(b). The higher concentrations of soil total N in T2, T3, and T4 (urea with clinoptilolite zeolite and compost) than in T1 suggest that both clinoptilolite zeolite and compost ensured slow release of urea-N. For T1 (urea alone), retention of total N was lower compared with urea with clinoptilolite zeolite and compost (T2, T3, and T4) because N was lost due to leaching of NH4+ and NO3− as discussed previously in Figures 5, 6, 7, and 8.

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.