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 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.

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

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 Assessing the Potential of Polymer Coated Urea and Sulphur Fertilization on Growth, Physiology, Yield, Oil Contents and Nitrogen Use Efficiency of Sunflower Crop under Arid Environment

Agronomy ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 269
Author(s):  
Sonia Perveen ◽  
Saeed Ahmad ◽  
Milan Skalicky ◽  
Ijaz Hussain ◽  
Muhammad Habibur-Rahman ◽  
...  
Keyword(s):  
Arid Environment ◽  
Nitrogen Fertilizers ◽  
Nitrogen Use ◽  
Growth Physiology ◽  
Sulphur Fertilizer ◽  
Coated Urea ◽  
Sunflower Crop ◽  
Use Efficiency ◽  
Polymer Coated Urea ◽  
Fertilizer Rates

Nitrogen and sulphur are fundamental macronutrients for the production of sunflower crop. Nitrogen is required consistently in larger amounts for sunflower production while common urea has more losses due to high solubility. On the other hand, sulphur application increases oil contents and availability of other essential nutrients (N, P, and K). Therefore, combined application of polymer coated urea with sulphur fertilization might be a promising option which can increase achene yield, oil contents, and nitrogen use efficiency (NUE). However, no particular studies have been conducted to explore the main and interactive effects of polymer coated urea and sulphur fertilization on growth, physiology, yield, oil contents, and NUE under arid field conditions. Hence, the current field experiment consisted of two nitrogen fertilizers [polymer coated urea (PCU) and common urea (CU)] and three sulphur fertilizer rates [S0 (0), S1 (30) and S2 (60) kg ha−1)] in a split-plot arrangement under randomized complete block design (RCBD) during spring season of 2019 and 2020. Experimental results revealed that growth, physiology, yield, oil contents, and NUE of sunflower crop were significantly improved with the application of nitrogen fertilizers, sulphur fertilizer rates, and their interaction. Meanwhile, NUE, achene yield and oil contents were increased by 16.0–17.2%, 16.5–17.0%, and 2.96–3.19% respectively with the application of PCU compared with CU. Furthermore, NUE, achene yield and oil contents were also increased by 12.8–13.3%, 13.1–13.7%, and 10.7–10.9%, respectively, due to sulphur fertilization of 60 kg ha−1compared with no sulphur application. Similarly, NUE, achene yield, and oil contents were increased by 32.9–39.5%, 31.7–32.6%, and 13.1–13.2% respectively with the application of PCU in combination with sulphur fertilization of 60 kg ha−1compared with CU × S0, which also evidenced a clear and positive interaction between nitrogen and sulphur. Conclusively, PCU (130 kg ha−1) in combination with sulphur fertilization of 60 kg ha−1 is promising option for obtaining higher achene yield, oil contents, and NUE for sunflower crop under arid environment, and hence, it might be a good agronomic adaptation strategy for sustainable production of sunflower.

scholarly journals Soil solution and plant nitrogen on irrigated rice under controlled release nitrogen fertilizers

2017 ◽  
Vol 48 (1) ◽  
Author(s):  
Thais Antolini Veçozzi ◽  
Rogério Oliveira de Sousa ◽  
Walkyria Bueno Scivittaro ◽  
Cristiano Weinert ◽  
Victor Raul Cieza Tarrillo
Keyword(s):  
Controlled Release ◽  
Rice Field ◽  
Nutrient Release ◽  
Nitrogen Fertilizers ◽  
Irrigated Rice ◽  
Plant Nitrogen ◽  
Coated Urea ◽  
Use Efficiency ◽  
Polymer Coated Urea ◽  
N Use

ABSTRACT: A study was conducted to evaluate the solubilization and nitrogen (N) use efficiency (NUE) of controlled release nitrogen fertilizers in irrigated rice, compared to urea. It was developed under semi-controlled conditions, including five treatments: Control, Splitted Urea (pre-sowing and topdressing), Pre-sowing urea, and Polymer Coated Urea (PCU) with 60-day and 90-day release. PCUs did not maintain high NH4 + and NO3 - levels in solution over a longer period than urea. NUE of PCUs was similar to uncoated urea, not increasing nutrient release in irrigated rice field.

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