Nitrification Inhibitor with Fall‐applied vs. Split Nitrogen Applications for Winter Wheat 1

1976 ◽  
Vol 68 (5) ◽  
pp. 737-740 ◽  
Author(s):  
F. C. Boswell ◽  
L. R. Nelson ◽  
M. J. Bitzer
Keyword(s):  
Winter Wheat ◽  
Nitrification Inhibitor

Enhanced nitrogen management strategies for winter wheat production in the Canadian prairies

2018 ◽  
Vol 98 (3) ◽  
pp. 683-702 ◽  
Author(s):  
B.L. Beres ◽  
R.J. Graf ◽  
R.B. Irvine ◽  
J.T. O’Donovan ◽  
K.N. Harker ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Grain Yield ◽  
Nutrient Management ◽  
Management Strategies ◽  
Maximum Yield ◽  
Nitrification Inhibitor ◽  
Early Spring ◽  
Nitrification Inhibitors ◽  
Side Band ◽  
Application Method

To address knowledge gaps around enhanced efficiency urea fertilizer efficacy for nitrogen (N) management, a study was designed to improve integrated nutrient management systems for western Canadian winter wheat producers. Three factors were included in Experiment 1: (i) urea type [urea, urea + urease inhibitor—Agrotain®; urea + urease and nitrification inhibitor—SuperU®, polymer-coated urea—Environmentally Smart Nitrogen® (ESN®), and urea ammonium nitrate (UAN)], (ii) application method (side-band vs. spring-broadcast vs. 50% side-band: 50% spring-broadcast), and (iii) cultivar (AC Radiant hard red winter wheat vs. CDC Ptarmigan soft white winter wheat). The Agrotain® and CDC Ptarmigan treatments were removed in Experiment 2 to allow for additional application methods: (i) fall side-band, (ii) 50% side-band — 50% late fall broadcast, (iii) 50% side-band — 50% early spring broadcast, (iv) 50% side-band — 50% mid-spring broadcast, and (v) 50% side-band — 50% late spring broadcast. CDC Ptarmigan produced superior grain yield and N utilization over AC Radiant. Grain yield and protein content were influenced by N form and application method. Split applications of N usually provided the maximum yield and protein, particularly with Agrotain® or SuperU®. An exception to the poor fall-application results was the SuperU® treatments, which produced similar yield to the highest-yielding treatments. The results suggest that split applications of N might be most efficient for yield and protein optimization when combined with an enhanced efficiency urea product, particularly with urease or urease + nitrification inhibitors, and if the majority of N is applied in spring.

scholarly journals N2O emissions from a loamy soil cropped with winter wheat as affected by N-fertilizer amount and nitrification inhibitor

2019 ◽  
Vol 114 (3) ◽  
pp. 173-191 ◽  
Author(s):  
Ivan Guzman-Bustamante ◽  
Thomas Winkler ◽  
Rudolf Schulz ◽  
Torsten Müller ◽  
Thomas Mannheim ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Nitrification Inhibitor ◽  
N Fertilizer ◽  
N2o Emissions ◽  
Loamy Soil

The effects on winter wheat of ammonium sulphate, with and without a nitrification inhibitor, and of calcium nitrate

1968 ◽  
Vol 71 (2) ◽  
pp. 243-249 ◽  
Author(s):  
J. K. R. Gasser ◽  
F. G. Hamlyn
Keyword(s):  
Winter Wheat ◽  
Ammonium Sulphate ◽  
Sandy Loam ◽  
Nitrification Inhibitor ◽  
Calcium Nitrate ◽  
Clay Loam ◽  
Light Soil ◽  
Heavy Soil ◽  
Loam Soil ◽  
Effect On Yield

SUMMARYWinter wheat grown on a sandy-loam and on a clay-loam soil was given ammonium sulphate alone or treated with the nitrification inhibitor, 2-chloro-6-(trichloromethyl)- pyridine, drilled with seed, in autumn. In spring, dressings of treated or untreated ammonium sulphate or of calcium nitrate, were broadcast. 75 or 150 lb N/acre were given on the sandy loam and 50 or 100 lb on the clay loam. Plants were sampled during growth and grain yield was measured.Without fertilizer-N, the wheat yielded 17 cwt/acre on the sandy-loam and 46 cwt on the clay, and with the double dressings given in spring yields were 52 and 56 cwt/ acre. On the light soil, treated ammonium sulphate given in autumn increased yield by 3–5 cwt/acre with the single dressing and by 5–4 cwt/acre with the double one.On the heavy soil the inhibitor had no effect on yield. Dressings of 50 lb N/acre in autumn or spring increased yields equally, but with 100 lb N/acre the spring dressing increased yield slightly more than autumn dressings. Calcium nitrate at 75 lb N/acre was significantly better than ammonium sulphate on the light soil.The inhibitor did not affect the speed with which N was taken up, or the total uptake, from fertilizer given in spring.

Influence of nitrification inhibitor (Nitrapyrin) on winter wheat yield 

2021 ◽  
Author(s):  
Rayehe Mirkhani ◽  
Mohammad Sajad Ghavami ◽  
Elnaz Ahmadi ◽  
Ebrahim Moghiseh
Keyword(s):  
Winter Wheat ◽  
Grain Yield ◽  
Stem Elongation ◽  
Block Design ◽  
Wheat Yield ◽  
Nitrification Inhibitor ◽  
Control Treatment ◽  
Nitrification Inhibitors ◽  
Ammonia Oxidizing Bacteria ◽  
Winter Wheat Yield

<p>Nitrogen (N) is a crop nutrient that is commonly applied as fertilizer, however the dynamic nature of N and its propensity for loss from soil‐plant systems creates a unique and challenging environment for its efficient management. Nitrification inhibitors (NIs) are compounds that can reduce the bacterial oxidation of NH<sub>4</sub><sup>+</sup> to NO<sub>2</sub><sup>−</sup> by inhibiting the activity of ammonia-oxidizing bacteria and maintaining a higher proportion of applied nitrogen in the soil by preventing nitrate loss from leaching and gaseous N losses from nitrification and denitrification. The organic compound 2-chloro-6-(tri-chloromethyl) pyridine, commonly known as nitrapyrin (NP), is such a nitrification inhibitor that is used in agriculture. The objective of this study was to investigate the effect of NI (NP) on winter wheat yield compared to farmers practice without NI at a given N rate and same number of N split applications.</p><p>A randomized complete block design in five replications was used in this study. Treatments were: T<sub>1</sub> (control treatment - without urea), T<sub>2</sub> (farmers practice - 300 kg urea/ha), and T<sub>3</sub> (urea+NP - 300 kg urea/ha). Urea was applied in three split applications at tillering, stem elongation and booting stages in treatments T<sub>2</sub> (farmers practice) and T<sub>3</sub> (urea+NP). The average grain yield of winter wheat was 8.7 t ha<sup>-1</sup> for the farmers practice (T<sub>2</sub>) and 9.1 t ha<sup>-1</sup> for the urea+NP treatment (T<sub>3</sub>) at the same number of split fertilizer applications.</p><p>The crop yield data showed that urea applied with NP (T<sub>3</sub>) did increase only slightly grain yield, as compared to farmers practice (T<sub>2</sub>). The grain yield increase with NP was about 4%, however the statistical analysis showed that this increase due to the application of urea with NP was not significant. Further research is needed to investigate additional nitrification inhibitors and their effect on wheat production.</p>

RESPONSE OF WINTER WHEAT TO FALL-APPLIED LARGE UREA GRANULES WITH DICYANDIAMIDE

1988 ◽  
Vol 68 (1) ◽  
pp. 133-142 ◽  
Author(s):  
YADVINDER SINGH ◽  
E. G. BEAUCHAMP
Keyword(s):  
Winter Wheat ◽  
Nitrification Inhibitor ◽  
Yield Potential ◽  
Soil Conditions ◽  
N Recovery ◽  
N Availability ◽  
Fertilizer N ◽  
Fertilizer N Recovery ◽  
Urea Granules ◽  
Urea Prills

Three field experiments were undertaken over a 2-yr period to compare the response of winter wheat to fall-applied large urea granules containing a nitrification inhibitor (dicyandiamide, DCD) with that of commercial urea granules (prills) applied as a top dressing in the spring. The objective was to determine the effectiveness of large urea granules coupled with DCD in conserving N when applied at planting or one month after planting. Granules of 1, 2 and 3 g urea as well as 2 g urea + DCD were compared with commercial urea prills at an application rate of 80 kg N ha−1. Large urea granules, as compared with fall-incorporated commercial urea prills, were effective in conserving N over the winter period especially when applied 1 mo after planting and resulted in yields and apparent N recovery similar to those with top dressed commercial prills applied in the spring. Incorporation of DCD into 2-g granules (50 or 100 g kg−1 urea) further increased the conservation of N fertilizer as reflected by higher yields and greater apparent fertilizer N recovery. Uptake of 15N from 2-g urea granules decreased with distance from the granule. However, plants furthest from spaced large granules were able apparently to obtain sufficient N to reach the yield potential dictated by the weather and soil conditions. Yield and N recovery data indicated that N conservation increased with increasing granule size. Crop response and fertilizer N availability decreased as depth of placement exceeded 10 cm. Placement between the 5 and 10 cm depths appeared to maximize fertilizer N availability. It was concluded that a combination of large urea granules and a nitrification inhibitor (such as DCD) can effectively conserve fall-applied N and result in yield responses and N uptake by winter wheat similar to that with commercial urea prills applied as a top dressing in the spring. Key words: Time of application, yield, 15N recovery, apparent fertilizer N recovery

scholarly journals Nitrous oxide emissions with enhanced efficiency and conventional urea fertilizers in winter wheat

2021 ◽  
Author(s):  
Haibo An ◽  
Jen Owens ◽  
Brian Beres ◽  
Yuejin Li ◽  
Xiying Hao
Keyword(s):  
Nitrous Oxide ◽  
Winter Wheat ◽  
Nitrification Inhibitor ◽  
Field Trials ◽  
Early Spring ◽  
Nitrous Oxide Emissions ◽  
Nitrification Inhibitors ◽  
Late Fall ◽  
Coated Urea ◽  
Polymer Coated Urea

AbstractOptimizing nitrogen fertilizer management can reduce nitrous oxide (N2O) emissions. This study tested if split applying enhanced efficiency fertilizers (EEFs) resulted in lower N2O emissions than applying equivalent rates of urea at planting. In semiarid southern Alberta, field trials were conducted during three years (planting to harvest) in rainfed winter wheat crops. Annual fertilizer rates ranged from 146 to 176 kg N ha−1. Fertilizer types were urea, and three EEFs (polymer-coated urea, urea with urease and nitrification inhibitors, and urea with a nitrification inhibitor). Each fertilizer type was applied three ways: 100% banded at planting, split applied 30% banded at planting and 70% broadcast in late fall, and split applied 30% banded at planting and 70% broadcast at Feekes growth stage 4 (GS4, post-tiller formation, wheat entering the greening up phase in the early spring). Nitrous oxide was measured using static chambers between sub-weekly and monthly from planting to harvest. Over three years, cumulative N2O emissions ranged from 0.16 to 1.32 kg N ha−1. This was equivalent to emissions factors between 0.009 and 0.688%. Cumulative N2O emissions and emissions factors did not differ between fertilizer types, but they were lower when fertilizer was split applied at GS4 compared to in late fall (P ≤ 0.10). Our study suggests that EEFs do not reduce N2O emissions from rainfed winter wheat crops, but a well-timed split application with a majority of fertilizer applied after winter can minimize N2O emissions.

The effect of a nitrification inhibitor on the concentration of nitrate in plants

1967 ◽  
Vol 68 (1) ◽  
pp. 131-133 ◽  
Author(s):  
T. Z. Nowakowski ◽  
J. K. R. Gasser
Keyword(s):  
Winter Wheat ◽  
Ammonium Nitrate ◽  
Ammonium Sulphate ◽  
Sandy Loam ◽  
Nitrification Inhibitor ◽  
Calcium Nitrate ◽  
Nitrate Content ◽  
Clay Loam ◽  
Permanent Grassland ◽  
Nitrate N

Calcium nitrate, or ammonium sulphate without or with 1% of the nitrification inhibitor 2-chloro-6 (trichloromethyl) pyridine were applied in the spring to winter wheat growing on clay- and sandyloam soils; 50 or 100 lb N/acre was applied on the clay-loam and 75 or 150 lb N/acre on the sandyloam. On permanent grassland ammonium nitrate or ammonium sulphate without or with 1 or 2% of inhibitor were broadcast to supply 100 or 200 lb N/acre. Winter wheat was sampled 32 days, and grass 68 days after applying fertilizers. Ammonium sulphate increased nitrate in the wheat on the clayloam soil but significantly less with than without the inhibitor. On the sandy-loam, wheat given ammonium sulphate with and without the inhibitor contained similar amounts of nitrate-N. The double amount of ammonium sulphate without inhibitor increased the nitrate content of grass most, and the nitrate content decreased with increasing amount of inhibitor.

Effect of a Nitrification Inhibitor on the K, Ca, and Mg Composition of Winter Wheat Forage 1

1982 ◽  
Vol 74 (3) ◽  
pp. 569-573 ◽  
Author(s):  
A. C. Mathers ◽  
B. A. Stewart ◽  
D. L. Grunes
Keyword(s):  
Winter Wheat ◽  
Nitrification Inhibitor
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