CONSEQUENCES OF Cu and Zn COATED UREA TO MINIMIZE AMMONIA VOLATILIZATION

Babar, Saima Kalsoom; Yusop, Mohd Khanif; Babar, Shakeel Ahmed; Khooharo, Aijaz Ali

doi:10.11113/jt.v78.9209

Cited by 7 publications

(9 citation statements)

References 19 publications

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“…The lower NH 3 loss through volatilization from soil with RSS-coated urea than in soil with uncoated urea was consistent with the findings of other researchers [19,[46][47][48][49][50]. The higher NH 3 loss in U (uncoated urea) than those of CU1, CU2, CU3, CU4, and CU5 (RSS-coated urea) (Figures 7 and 8) was due to the hydrolysis and ammonification of urea, which consumes hydrogen ions to produce NH 4 + ions and results in an increase in soil pH, as shown in Figure 9.…”

Section: Comparison Of Ammonia Loss From Uncoated Urea and Rejected S...supporting

confidence: 91%

Rejected Sago Starch as a Coating Material to Mitigate Urea-Nitrogen Emission

et al. 2022

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Urea–nitrogen is commonly lost through ammonia (NH3) volatilization, denitrification, and nitrate (NO3−) leaching. Rejected sago starch (RSS), which is a by-product of sago flour extraction, could be used to minimize NH3 volatilization from urea. Urea granules were coated with different concentrations of RSS (2%, 3%, 4%, 5%, and 6%), and their effects on NH3 emission, soil pH, exchangeable ammonium (NH4+), and available NO3− were determined. The urea was coated with RSS and homogenized using a mini rotary machine. The RSS-coated urea granules were dyed to differentiate their concentrations. The effectiveness of the RSS as a coating material was determined using a closed-dynamic air flow system. The soil used in the NH3 volatilization was the Bekenu series (Sandy loam, Typic Paleudults). This study compared seven different mixture treatments: soil alone (S), 5 g of uncoated urea (U), 5 g of 2% RSS-coated urea (CU1), 5 g of 3% RSS-coated urea (CU2), 5 g of 4% RSS-coated urea (CU3), 5 g of 5% RSS-coated urea (CU4), and 5 g of 6% RSS-coated urea (CU5). Urea coated with RSS, particularly CU1, effectively minimized NH3 loss and improved the retention of soil exchangeable NH4+ and available NO3− compared with uncoated urea because the RSS serves as a barrier to minimizing the concentration of NH3 from urea hydrolysis. Urea could be coated with RSS at the 2% concentration to enhance urea–N efficiency through a reduction in NH3 emission from urea. RSS-coated urea could be an alternative for farmers because of its controlled release of N and economical benefits. Field planting using rice as a test crop to solidify the effectiveness of RSS-coated urea in improving N retention from urea is still ongoing.

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Section: Comparison Of Ammonia Loss From Uncoated Urea and Rejected S...supporting

confidence: 91%

Rejected Sago Starch as a Coating Material to Mitigate Urea-Nitrogen Emission

et al. 2022

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“…The increased NUE may have reduced N losses through denitrification, volatilization, leaching and surface runoff [58,65]. The increased NUE has resultantly increased yield and reduced the cost of production incurred on fertilizer inputs [66,67]. A reduction in NH 3 volatilization caused optimum N uptake owing to application of Zn coated urea [50].…”

Section: Discussionmentioning

confidence: 99%

Bioactive Zincated Urea Effectively Enhanced Crop Yield, Nitrogen Use Efficiency, and Grain Quality in Maize and Rice

Akhtar,

Shah,

Sarwar

et al. 2023

Pol. J. Environ. Stud.

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Coating materials generally a provide physical barrier to control instant dissolution of the urea fertilizer thereby delaying its consequent reactions in soil. The use of zinc salt as coating material causes slow dissolution of urea due to physical impact and hence minimizes immediate urea hydrolysis, ammonia (NH 3 ) volatilization and enhances N utilization in crop production. The current investigation studied the impact of Bioactive Zincated urea on NH 3 losses, yield parameters and quality traits of maize and rice crops grown under field conditions. Treatments included Bioactive zincated urea (ZU) was applied at 100%, 90% and 80% of recommended N rates (RNR) (125 and 160 kg N ha -1 for rice and maize, respectively) having a control (zero N application), conventional urea at RNR (CU 100 ) without Zn and along with Zn (CU+Zn) treatments. The NH 3 losses were recorded at 2, 4, 7 and 14 days after application of each split application of N treatments. The results indicated 117 and 6% increase in maize grain and 167 and 2.7% in total paddy yield as compared to control (no Zn) and CU+Zn, respectively while the corresponding increase in grain Zn concentration was 37 and 15% in maize and 25 and 14% in rice, respectively. Similarly, the corresponding grain N increases were 16 and 22%. Furthermore, ZU 100 application markedly decreased NH 3 volatilization (5 to 14% in maize and 2 to 24% in rice field) as compared to CU 100 . The studies clearly elucidates the effectiveness of Bioactive zincated urea in increasing yield and quality of crops (rice and maize); the lower N application

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“…Nitrogen is one of the most crucial plant nutrients that affects the growth and development of wheat 29 . However, the application of conventional urea (46% N) on the soil surface leads to significant losses ranging from 1 to 60% in the form of ammonia, volatilization, and nitrous oxide emissions 30 – 32 . The increase in growth parameters of wheat is linked to a sufficient supply of nitrogen that contributes to increased enzymatic activity 30 .…”

Section: Discussionmentioning

confidence: 99%

“…However, the application of conventional urea (46% N) on the soil surface leads to significant losses ranging from 1 to 60% in the form of ammonia, volatilization, and nitrous oxide emissions 30 – 32 . The increase in growth parameters of wheat is linked to a sufficient supply of nitrogen that contributes to increased enzymatic activity 30 . The sandy loam texture and poor fertility condition of soils can lead to improved wheat growth characteristics and yield with nitrogen fertilization 33 .…”

Section: Discussionmentioning

confidence: 99%

Boosting wheat yield, profitability and NUE with prilled and nano urea in conservation tillage

Kumar,

Tripathi,

Yadav

et al. 2023

Sci Rep

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Rice–wheat production in the Indo-gangetic plains (IGPs) of India faces major concerns such as depleting resources, rice residue burning, excessive fertilizer use, and decreasing nitrogen use efficiency. These issues threaten sustainable crop production in the future. Therefore, a field study was conducted during the winter seasons of 2020–21 and 2021–22 to evaluate the effect of combined conventional and nano fertilizers on nitrogen application just before or after irrigation to improve wheat productivity, profitability and NUE under conservation tillage. The study evaluated eight treatment combinations of nitrogen application through conventionally applied urea (46% N) and foliar applied nano urea (4% N) under zero tillage with rice residue retention. Results revealed that growth, physiological indices, yield, and quality parameters were enhanced with the application of 150 kg N/ha in three equal splits as basal and just before 1st and 2nd irrigation alone (T2) or along with a spray of nano urea (T5) compared to other treatments. T5 recorded 7.2%, 8.5%, and 7.8% more plant dry matter, number of tillers, and grain yield, respectively, over the conventional practice of applying 150 kg N/ha in three equal splits as basal and 7–10 days after 1st and 2nd irrigation (T3, farmers practice). Although, T2 showed similar results to T5, T5 recorded significantly higher gross ($2542/ha) and net returns ($1279/ha) than the other treatments. However, the benefit–cost ratio of T2 and T5 was same (2.01). A significant and positive correlation coefficient between grain yield and physiological parameters such as CCI and NDVI confirmed that increasing the nitrogen dose enhanced the chlorophyll content, greenness, and plant vigor. Based on the results, it can be concluded that applying 150 kg N/ha in three equal splits as basal and just before 1st and 2nd irrigation under conservation agriculture, along with a single spray of nano urea (4% N) at 60–65 days after sowing, can improve growth, yield attributes, wheat yield, and NUE compared to farmers practice (T3) in India.

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CONSEQUENCES OF Cu and Zn COATED UREA TO MINIMIZE AMMONIA VOLATILIZATION

Cited by 7 publications

References 19 publications

Rejected Sago Starch as a Coating Material to Mitigate Urea-Nitrogen Emission

Rejected Sago Starch as a Coating Material to Mitigate Urea-Nitrogen Emission

Bioactive Zincated Urea Effectively Enhanced Crop Yield, Nitrogen Use Efficiency, and Grain Quality in Maize and Rice

Boosting wheat yield, profitability and NUE with prilled and nano urea in conservation tillage

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