Ammonia Volatilization from Urea‐Based Fertilizers Applied to Tall Fescue Pastures in Georgia, USA

Vaio, N.; Cabrera, M. L.; Kissel, D. E.; Rema, J.; Newsome, James F.; Calvert, V. H.

doi:10.2136/sssaj2007.0300

Cited by 52 publications

(31 citation statements)

References 23 publications

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“…Torello et al (1983) reported NH 3 volatilization of 0.2-10.3 % of applied urea-N in various forms (prilled urea, coated urea, or dissolved urea, at 49-293 kg N ha -1 ) to Kentucky bluegrass. Vaio et al (2007) reported 12-46 % volatilization of urea-N (urea polymer, urea-NH 4 NO 3 , or granular urea, at 50 kg N ha -1 ) applied to tall fescue plots. Huckaby Knight et al (2012) reported significantly lower volatilization of coated urea-N than uncoated urea from warm-season turfgrass (e.g., 3.6-4.4 vs. 11.7-17.9 %) fertilized at 146 kg N ha -1 .…”

Section: N Losses Through Gaseous and Aqueous Formsmentioning

confidence: 99%

Nitrogen budgets of urban lawns under three different management regimes in southern California

Wang

Haver²,

Pataki

2013

Biogeochemistry

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We constructed nitrogen (N) budgets for the lawns of three simulated residences built to test the environmental impacts of three different residential landscape designs in southern California. The three designs included: a ''Typical'' lawn planted with cool season tall fescue (Schedonorus phoenix), fertilized at the recommended rate for this species (192 kg -1 ha -1 year -1 ) and irrigated with an automatic timer; a design intended to lower N and water requirements (''Low Input'') with the warm season seashore paspalum (Paspalum vaginatum) fertilized at 123 kg -1 ha -1 year -1 and irrigated with a soil moisture-based system; and a design incorporating local best practices (''Low Impact'' lawn) that included the native sedge species Carex, fertilized at 48 kg -1 ha -1 year -1 and irrigated by a weather station-based system. Plant N uptake accounted for 33.2 ± 0.5 (tall fescue), 53.7 ± 0.7 (seashore paspalum), and 12.2 ± 1.3 % (Carex) of annual N inputs, while estimated N retention in soil was relatively large and similar in the three lawns (41-46 %). At lower N and water inputs than Typical, Low Input showed the highest annual clipping yield and N uptake, although it also had higher denitrification rates. Leaching inorganic N losses remained low even from the Typical lawn (2 %), while gaseous N losses were highly variable. The Low Input lawn was most efficient in retaining N with relatively low water and N costs, although its fertilization rates could be further reduced to lower gaseous N losses. Our results suggest that the choice of a warm-season, C 4 turf species with reduced rates of irrigation and fertilization is effective in this semi-arid region to maintain high productivity and N retention in plants and soils at low N and water inputs.

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Section: N Losses Through Gaseous and Aqueous Formsmentioning

confidence: 99%

Nitrogen budgets of urban lawns under three different management regimes in southern California

Wang

Haver²,

Pataki

2013

Biogeochemistry

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“…However, the low economic return and environmental impacts caused by fertilizer use have raised the need to recover the pastures by sustainable means (Vaio et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Nutritional characteristics of marandu grass (Brachiaria brizantha cv. marandu) subjected to inoculation with associative diazotrophic bacteria

Guimarães¹,

Santos²,

Bonfim-Silva³

et al. 2016

Afr. J. Microbiol. Res.

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Due to the search for viable and cost-effective ways to provide nitrogen for forage grasses, inoculation with diazotrophs presents high potential as an alternative to plant nutrition by reducing the use of nitrogen fertilizers. The objective of this work was to evaluate the nutrition of marandu grass (Brachiaria brizantha cv. marandu) subjected to inoculation with associative diazotrophic bacteria grown in Cerrado soil (Brazilian Savanna). The experiment was conducted in a greenhouse with a completely randomized design using five treatments (three strains of associative nitrogen fixing bacteria [MTH2, MTB1 and Y2], an inoculant formed by combination of strains AbV5 and AbV6 (Azospirillum brasilense) and a control (100 mg dm -3 of N-urea]) and five replications, totaling 25 experimental units. The inoculation was performed by inserting a 5 mL aliquot of bacterial broth containing 10 9 cells mL -1 in the soil near the root system of each plant. Three cuts were made at 30, 60 and 90 days after sowing. The variables: Falker chlorophyll index, nitrogen concentration in shoots and roots and crude protein in shoots of marandu grass were evaluated. The highest values for Falker chlorophyll index, nitrogen concentration, and crude protein were observed in the three cuts in plants that received N fertilization. The MTH2 strain positively influenced the nitrogen concentration in shoots and roots, and crude protein in shoots in the first and second cuts of marandu grass, whereas in the third cut, these parameters were influenced by nitrogen fertilization. In conclusion, the inoculation with associative diazotrophic bacteria may contribute positively to the nitrogen nutrition of marandu grass.

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“…Hanritusei) yield and N recovery with resin-coated N fertilizer. In field and laboratory studies using conditions favorable to ammonium volatilization, Vaio et al (2008) measured NH 3 losses from urea formaldehyde polymer and found that less NH 3 was lost.…”

Section: Discussionmentioning

confidence: 99%

“…This is mostly due to availability, cost and ease of transportation. Half of the N in UAN is in the form of urea, which can be lost through volatilization when applied on the soil surface where the surface pH is above 6.5 (Vaio et al, 2008). The remaining N in UAN is in the form of ammonium nitrate.…”

Section: Introductionmentioning

confidence: 99%

The IMPACT OF THE POLYMER COATING NUTRISPHEREâ¢ IN INCREASING NITROGEN USE EFFICIENCY AND CORN YIELD

Heiniger

Smith

Wiatrak

2014

American Journal of Agricultural and Biological Sciences

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Currently, it is estimated that 50 to 60% of the N applied fertilizer is actually utilized by the crop with the remaining N lost through leaching or denitrification. A three year study was conducted at eight locations in North Carolina to examine the impact of Nutrisphere™ on corn yield, optimum N rate, maximum yield, tissue N concentration, plant biomass and N uptake. At six locations the study consisted of a split plot design where main plots were either 30% Urea Ammonium Nitrate (UAN) or 30% UAN plus Nutrisphere™ applied either at planting or layby with subplots consisting of five N rates that differed slightly across years. At two locations, two N solutions were applied at two rates to plots that received one of two starter fertilizer treatments. The overall trend indicated that Nutrisphere™ increased yield compared to the use of 30% UAN alone with a significant (p<0.10) yield increases of 0.74 Mg ha −1 from combined results at Bertie08 and Pamlico08, 0.93 Mg ha −1 from combined results at Guilford08 and Forsythe08 and 0.37 Mg ha −1 from the treatment with at planting application of N at Beaufort09 and Pamlico09. While Nutrisphere™ only reduced optimum N rate in two trials, there was a consistent increase in maximum potential yield across trials. Plant analysis found that Nutrisphere™ increased biomass at one location, although it did not affect tissue N concentration and did not result in consistent increases in plant N uptake. The significant impacts of Nutrisphere™ on plant biomass and corn yield indicate that it affects the N movement to the root surface over a short period of time after application. More research is needed to determine how Nutrisphere™ impacts N movement in the soil, N transformations and N uptake to improve recommendations regarding its use and potential for increasing yield.

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Ammonia Volatilization from Urea‐Based Fertilizers Applied to Tall Fescue Pastures in Georgia, USA

Cited by 52 publications

References 23 publications

Nitrogen budgets of urban lawns under three different management regimes in southern California

Nitrogen budgets of urban lawns under three different management regimes in southern California

Nutritional characteristics of marandu grass (Brachiaria brizantha cv. marandu) subjected to inoculation with associative diazotrophic bacteria

The IMPACT OF THE POLYMER COATING NUTRISPHEREâ¢ IN INCREASING NITROGEN USE EFFICIENCY AND CORN YIELD

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Ammonia Volatilization from Urea‐Based Fertilizers Applied to Tall Fescue Pastures in Georgia, USA

Cited by 52 publications

References 23 publications

Nitrogen budgets of urban lawns under three different management regimes in southern California

Nitrogen budgets of urban lawns under three different management regimes in southern California

Nutritional characteristics of marandu grass (Brachiaria brizantha cv. marandu) subjected to inoculation with associative diazotrophic bacteria

The IMPACT OF THE POLYMER COATING NUTRISPHEREâ¢ IN INCREASING NITROGEN USE EFFICIENCY AND CORN YIELD

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Resources

About

The IMPACT OF THE POLYMER COATING NUTRISPHEREâ¢ IN INCREASING NITROGEN USE EFFICIENCY AND CORN YIELD