Dicyandiamide (DCD) as a nitrification inhibitor for rice culture in the United States

Wells, B. R.; Bollich, P. K.; Ebelhar, W.; Mikkelsen, D. S.; Norman, Richard; Brandon, D. M.; Helms, R. S.; Turner, Fred; Westcott, M. P.

doi:10.1080/00103628909368199

Cited by 19 publications

(3 citation statements)

References 3 publications

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“…This practice minimizes N loss mechanisms and enhances N uptake and grain yield potential of delayed‐flood rice (Griggs et al, 2007; Norman et al, 2009; Dillon et al, 2012). Our findings are similar to Wells et al (1989) in that DCD was effective at increasing grain yield when urea was applied and remained in aerobic conditions for an extended period of time; however, our grain yield response to DCD was much greater than the average of the clay soils they reported even though we allowed nitrification conditions to persist for approximately one‐half the amount of time.…”

Section: Resultssupporting

confidence: 84%

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Nitrification and Yield for Delayed‐Flood Rice as Affected by a Nitrification Inhibitor and Coated Urea

et al. 2014

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Laboratory experiments were conducted in 2010, 2011, and 2012 in Stoneville, MS, utilizing urea fertilizer to quantify the nitri cation potential of southern soils, and to evaluate a nitri cation inhibitor aimed to reduce nitri cation rates on clay soils. Field research was conducted from 2011 to 2013 evaluating the e ectiveness of dicyandiamide (DCD) and sulfur-polymer coated urea at reducing N loss compared to urea alone on clay soil. e number of days when half the total recovered inorganic N was in the NH 4 + -N form (half-life for ammonium) for each soil and stabilizer for the nitri cation potential and N stabilizer experiments was determined. Nitrogen was applied to the soil at 0.115 g kg -1 for both laboratory experiments while DCD was applied at three di erent rates for the N stabilizer experiment. ese studies con rmed that the Sharkey clay soil (very-ne, smectitic, thermic Chromic Epiaquerts) at Stoneville, MS, had signi cantly higher nitri cation potential compared to three other soil types studied and DCD increased half-life for ammonium by approximately threefold when compared to non-amended urea. Field experiment data indicated that increasing DCD rate to 17 kg ha -1 increased rice (Oryza sativa L.) grain yield response and resulted in yields comparable to the standard treatment, which was urea applied 1 day before ood establishment (dbf). e sulfur-polymer coated urea applied 12 dbf reduced nitri cation; however, it yielded less than the standard treatment. Products that limit nitri cation and subsequent denitri cation can optimize N e ciency, resulting in greater potential for increased yields and decreased production costs.

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Section: Resultssupporting

confidence: 84%

“…Over 9 site‐years of data were obtained and researchers concluded that rice grain yields were 8% greater with DCD compared to urea alone when applied pre‐plant. However, yields were 20% greater when urea was applied preflood compared to pre‐plant (Wells et al, 1989).…”

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Nitrification and Yield for Delayed‐Flood Rice as Affected by a Nitrification Inhibitor and Coated Urea

et al. 2014

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“…Nitrification inhibitors such as 3,4-dimethylpyrazole phosphate (DCD) are useful in not only delaying microbial nitrification and subsequently denitrification, but also in reducing N losses in the forms of nitrous oxide (N 2 O) emission and NO 3 − leaching 15 16 . The application of DCD blended N enhances the yields of corn 17 , wheat 18 , and rice 19 . However, Weiske et al .…”

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confidence: 99%

Responses of corn physiology and yield to six agricultural practices over three years in middle Tennessee

Hui

Deng

et al. 2016

Sci Rep

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Different agricultural practices may have substantial impacts on crop physiology and yield. However, it is still not entirely clear how multiple agricultural practices such as tillage, biochar and different nutrient applications could influence corn physiology and yield. We conducted a three-year field experiment to study the responses of corn physiology, yield, and soil respiration to six different agricultural practices. The six treatments included conventional tillage (CT) or no tillage (NT), in combination with nitrogen type (URAN or chicken litter) and application method, biochar, or denitrification inhibitor. A randomized complete block design was applied with six replications. Leaf photosynthetic rate, transpiration, plant height, leaf area index (LAI), biomass, and yield were measured. Results showed that different agricultural practices had significant effects on plant leaf photosynthesis, transpiration, soil respiration, height, and yield, but not on LAI and biomass. The average corn yield in the NT-URAN was 10.03 ton/ha, 28.9% more than in the CT-URAN. Compared to the NT-URAN, the NT-biochar had lower soil respiration and similar yield. All variables measured showed remarkable variations among the three years. Our results indicated that no tillage treatment substantially increased corn yield, probably due to the preservation of soil moisture during drought periods.

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Nitrogen fertilization timing and rate influence N recovery efficiency and rice yield

Kongchum,

Harrell,

Ahmed

et al. 2024

Agronomy Journal

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Nitrogen (N) fertilizer management in rice (Oryza sativa L.) varies with production practices. In drill‐seeded, delayed‐flood production systems, the most common production practice in Louisiana N fertilizer is applied at two application timings. The first application timing is just before the permanent flood is established. The second application is at midseason. Nitrogen fertilization before flooding is critical for maximum N uptake, nitrogen recovery efficiency (NRE), and yield. Field experiments were conducted from 2017 to 2020 to evaluate N timing effects on N uptake, NRE, and rice yield. The rice cultivar CL153 was drill‐seeded into a stale seedbed at a seed rate of 85 kg ha−1. Fertilizer‐N was applied utilizing multiple application timings and rates adding up to a seasonal rate of 155 kg ha−1 across treatments. A single N application 1‐day before flooding significantly increased grain yield in all trials, ranging from 8523 kg ha−1 in 2019 to 11,322 kg ha−1 in 2018. Compared to post‐flood applications, preflood N increased plant height, N uptake, and NRE. Split N application rates and timings after flooding did not impact rice yield or its agronomics, such as height, aboveground biomass, and time of heading. NRE and yield were significantly correlated (r = 0.805; p < 0.001). Our results indicated that a single N application before flooding has the potential to be an alternative option for N management in the drill‐seeded, delayed‐flood rice system.

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Dicyandiamide (DCD) as a nitrification inhibitor for rice culture in the United States

Cited by 19 publications

References 3 publications

Nitrification and Yield for Delayed‐Flood Rice as Affected by a Nitrification Inhibitor and Coated Urea

Nitrification and Yield for Delayed‐Flood Rice as Affected by a Nitrification Inhibitor and Coated Urea

Responses of corn physiology and yield to six agricultural practices over three years in middle Tennessee

Nitrogen fertilization timing and rate influence N recovery efficiency and rice yield

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