Effects of polymer coated urea and sulfur fertilization on yield, nitrogen use efficiency and leaf senescence of cotton

2016 ◽  
Vol 187 ◽  
pp. 87-95 ◽  
Author(s):  
Jibiao Geng ◽  
Qiang Ma ◽  
Jianqiu Chen ◽  
Min Zhang ◽  
Chengliang Li ◽  
...  
Keyword(s):  
Leaf Senescence ◽  
Nitrogen Use Efficiency ◽  
Nitrogen Use ◽  
Coated Urea ◽  
Use Efficiency ◽  
Polymer Coated Urea ◽  
Sulfur Fertilization

scholarly journals Influence of Biodegradable Polymer Coated Urea on Nitrogen Uptake and Utilization of Maize (Zea mays L)

2021 ◽  
pp. 297-306
Author(s):  
B. Balaganesh ◽  
P. Malarvizhi ◽  
N. Chandra Sekaran ◽  
P. Jeyakumar ◽  
K. R. Latha ◽  
...  
Keyword(s):  
Grain Yield ◽  
Nitrogen Uptake ◽  
Nitrogen Use Efficiency ◽  
Biodegradable Polymer ◽  
Dry Matter ◽  
Nitrogen Use ◽  
Urea Fertilizer ◽  
Coated Urea ◽  
Use Efficiency ◽  
Polymer Coated Urea

Controlled release nitrogen fertilizers could be an excellent management approach for improving nitrogen fertilizer efficiency. The present study aimed to investigate the effect of coated urea fertilizers to increase nitrogen uptake and utilization of maize. The nitrogen use efficiency of maize from various biodegradable polymer-coated urea fertilizers, such as palm stearin coated urea (PSCU), pine oleoresin coated urea (POCU), and humic acid coated urea (HACU), was determined in a pot culture experiment conducted at the Department of Soil Science and Agricultural Chemistry, Tamil Nadu Agricultural University, Coimbatore, during 2021. The coating materials have been coated on urea with different coating thicknesses, viz., PSCU - 5, 10, 15%, POCU – 2, 4, 6%, and HACU - 5, 10, 15%. Among all the treatments, T11: HACU 15% produced highest grain yield (72.0g plant-1) followed by T7: POCU 4% (69.7 g plant-1) and T4: PSCU 10% (69.0g plant-1). In terms of dry matter production, T10: PSCU 10% produced maximum dry matter (186.5g plant-1), followed by T11: HACU 15% (186.2 g plant-1), and T7: POCU 4% (185.3g plant-1). The nitrogen uptake by the maize plant was higher in T7: POCU 4 % (1.62g plant-1), followed by T11: HACU 15% (1.59 g plant-1) and T4: PSCU 10% (1.59g plant-1). Irrespective of treatments, the highest nitrogen utilization by the maize crop was found in T7: POCU 4% (73.9%) followed by T4: PSCU 10% (71.1%) and T11: HACU 15% (70.9%) treatments. When compared to uncoated urea fertilizer, all coated urea fertilizers outperformed uncoated urea fertilizer in terms of grain yield, dry matter accumulation, and nitrogen uptake. To improve the nitrogen use efficiency, coated urea fertilizers prove to be a promising alternative to uncoated urea fertilizers.

Performance of polymer-coated urea in transplanted rice: effect of mixing ratio and water input on nitrogen use efficiency

2010 ◽  
Vol 8 (2) ◽  
pp. 189-198 ◽  
Author(s):  
Mukund D. Patil ◽  
Bhabani S. Das ◽  
Eran Barak ◽  
Pratap B. S. Bhadoria ◽  
Amir Polak
Keyword(s):  
Nitrogen Use Efficiency ◽  
Mixing Ratio ◽  
Nitrogen Use ◽  
Transplanted Rice ◽  
Coated Urea ◽  
Use Efficiency ◽  
Polymer Coated Urea

scholarly journals Response of bermudagrass to enhanced-efficiency fertilizers, application strategies and release under tropical conditions

2020 ◽  
pp. 108-115
Author(s):  
Bernardo Melo Montes Nogueira Borges ◽  
Fernanda Ribeiro Peixoto ◽  
Marilena de Melo Braga ◽  
Barbara de Brito Brunozzi ◽  
Maria Lucia Silveira ◽  
...  
Keyword(s):  
Sampling Period ◽  
Nitrogen Use ◽  
N Fertilizers ◽  
Release Pattern ◽  
Tropical Conditions ◽  
Coated Urea ◽  
Important Input ◽  
Use Efficiency ◽  
Field Incubation ◽  
Polymer Coated Urea

Nitrogen fertilization is an important input for crop yield; however, it can result in detrimental environmental effects due to low use efficiency of regular N sources. This study evaluated the effects of N fertilizers and application strategies (single vs. split application) on bermudagrass (Cynodon spp.) responses and release pattern and rate in controlled and field incubations. The bermudagrass study was arranged in a two-way factorial scheme of 6 N fertilizers, urea, Polymer Coated Urea (PCU), PCU-6 (6 months), PCU-4 (4 months), PCU-2 (2 months) and urea + urease inhibitor (U-NBPT) applied as a single (400 kg N ha-1 yr-1) or two split applications of 200 kg N ha-1 (400 kg N ha-1 yr-1). The controlled experiment was a two-way factorial of PCU-6, PCU-4, PCU-2 and 15, 45 and 90% water hold capacity (WHC), sampling period of 170 days, the field incubation used the same sources sampled up to 220 days. Enhanced-efficiency fertilizers (EEF) increased herbage accumulation (HA) by 1.3 Mg ha-1 compared to untreated urea, on average. Nitrogen use efficiency (NUE) was greater for EEFs (44%) than urea (36%). Results showed that increased soil moisture inferred positive responses in release pattern and a minimum of 45% WHC was necessary for optimum release. Fertilizers at field conditions resulted in an earlier release than expected, ~20 days.

scholarly journals N-(n-Butyl) Thiophosphoric Triamide (NBPT)-Coated Urea (NCU) Improved Maize Growth and Nitrogen Use Efficiency (NUE) in Highly Weathered Tropical Soil

2020 ◽  
Vol 12 (21) ◽  
pp. 8780
Author(s):  
Muhammad Muhaymin Mohd Zuki ◽  
Noraini Md. Jaafar ◽  
Siti Zaharah Sakimin ◽  
Mohd Khanif Yusop
Keyword(s):  
Nitrogen Use Efficiency ◽  
Plant Uptake ◽  
N Uptake ◽  
Growth Yield ◽  
Dry Weight ◽  
Tropical Soil ◽  
Nitrogen Use ◽  
Weight Yield ◽  
Coated Urea ◽  
Use Efficiency

Nitrogen (N) fertilizer is commonly used to supply sufficient N for plant uptake, for which urea is one of the highly preferred synthetic N fertilizers due to its high N content. Unfortunately, N provided by urea is rapidly lost upon urea application to soils through ammonia volatilization, leaching, and denitrification. Thus, treatment of urea with urease inhibitor (N-(n-Butyl) Thiophosphoric Triamide (NBPT)) is among the solutions to slow down urea hydrolysis, therefore reducing loss of NH3 and saving N available for plant uptake and growth. A field study was carried out to evaluate the effects of NBPT-coated urea (NCU) at varying rates on growth, yield, and nitrogen use efficiency (NUE) of maize in tropical soil. The experiment was conducted at Field 15, Universiti Putra Malaysia, Serdang, Selangor, Malaysia, and maize (Zea mays var. Thai Super Sweet) was used as the test crop. The results showed that all maize grown in soils applied with urea coated with NBPT (NCU) (T2, T3, T4, and T5) had significantly (P ≤ 0.05) higher chlorophyll content compared to the control (T0 and T1). The surface leaf area of maize grown in NCU-treated soils at 120 kg N h−1 (T3) was recorded as the highest. NCU at and 96 kg N ha−1 (T3 and T4) were relatively effective in increasing maize plant dry weight, yield, and N uptake. Improvement of NUE by 45% over urea was recorded in the treatment of NCU at 96 kg N ha−1. NBPT-coated urea (NCU) at 96 kg N ha−1 had potential to increase the growth, yield, nitrogen uptake, and NUE of maize by increasing the availability of N for plant growth and development.

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