Improving winter wheat grain yield and nitrogen use efficiency using nitrogen application time and rate

Aula, Lawrence; Omara, Peter; Oyebiyi, Fikayo; Eickhoff, Elizabeth; Carpenter, Jonathan; Nambi, Eva; Fornah, Alimamy; Raun, W. R.

doi:10.1002/agg2.20148

Cited by 7 publications

(4 citation statements)

References 58 publications

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“…Wheat varieties did not respond to supplemented inorganic fertilizer N, possibly due to the high soil mineralization potential that supplied adequate N, meeting crop demands over the springtime. Similar results were achieved by [41]. Spring N treatment provided low NUE for NS40S (only 3% for 50 N kg ha −1 ; 4%for 100 N kg ha −1 ; 3% for 150 N kg ha −1 ).…”

Section: Multiyear Analysissupporting

confidence: 78%

The Effect of N Fertilizer Application Timing on Wheat Yield on Chernozem Soil

et al. 2021

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The challenges of the global food supply and environment conservation require ongoing scientific observations of soil-to-plant and plant-to-environment interactions with the aim of improving agriculture resource management. This study included observations of winter wheat yield and biomass of four varieties over three consecutive growing seasons and four site-year cases to assess the effects of nitrogen (N) fertilization rate and time of application on grain yield and biomass. For different wheat varieties, the full factorial design was performed, where factorial combinations of year, location, fall and spring N applications were laid out in a randomized complete block design. The N rate significantly influenced grain yield and biomass production efficiency. The time of N application had a highly significant effect on grain yield, biomass and NUE traits. The N rate of 120 kg ha−1 was recognized as a breakpoint over which the grain yield and biomass showed a downtrend. N application in the fall had a significantly higher impact on grain yield and biomass compared to spring N application. The major contribution of wheat variability production belongs to seasonal climate circumstances (<85%) and consequential intrinsic soil properties. The average difference of grain yield between varieties was 15.75%, and 12% of biomass, respectively.

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Section: Multiyear Analysissupporting

confidence: 78%

The Effect of N Fertilizer Application Timing on Wheat Yield on Chernozem Soil

et al. 2021

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“…Our report showed a significant yield variation by environments mainly due to precipitation, which agrees with prior research reports on wheat and other cereal crops (Aula et al., 2021; Gandía et al., 2021; Holman et al., 2011; Obour et al., 2022). This indicates that, despite the last data for our experiment is already 20 years old, results presented in this study are relevant to current production systems and characterize wheat N response across variable environment.…”

Section: Discussionsupporting

confidence: 93%

Continuous winter wheat response to nitrogen fertilizer rate in long‐term reduced tillage semi‐arid variable yield environments

Obour,

Holman,

Assefa

2023

Crop Science

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Reduced tillage (RT) increased soil water storage compared with conventional tillage, enabling an associated increase in crop performance. However, information on nitrogen (N) fertilizer rates for RT systems is limited. The objectives of this long‐term study were to determine agronomic and economical optimal N rates for a continuous winter wheat (Triticum aestivum L.) system under RT at different yield environments. This study was conducted at Kansas State University Agricultural Research Center near Hays, KS, from 1971 through 2003. There were six N fertilizer rate treatments (0, 22, 45, 67, 90, and 112 kg N ha−1) arranged in a randomized complete block design with six replications. Over the 33 years, winter wheat yields ranged from a minimum of 370 kg ha−1 to a maximum of 3948 kg ha−1 with mean yield of 2015 kg ha−1 and standard deviation of 669 kg ha−1. Agronomic optimal N rates for wheat varied from 70 in very low yield (VLY) to 79 kg N ha−1 in very high yield (VHY) environment. The economic optimal N rates estimated for continuous wheat ranged from 59 in VLY to 71 kg N ha−1 in VHY environments. However, net profits from fertilizer application ranged from $63 in VLY to $443 ha−1 in VHY environment. We concluded that applying 60–70 kg N ha−1 would optimize dryland continuous RT wheat yields and profitability, but N removal and recovery efficiency (grain N [applied N]−1) are less in lower yielding environments.

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“…Greater winter wheat grain yield with N fertilization in years with a greater water supply to water demand ratio was reported (Ghimire et al., 2021). Across two sites in Oklahoma, about 90 kg N ha −1 was required to increase winter wheat yield above the unfertilized control (Aula et al., 2021). Often, recommended N fertilizer application rates for grain crops have been determined based on expected yield and associated nutrient removal (NR), and for winter wheat, about 1 kg N per 30 kg yield ha −1 was estimated in Kansas (Leikam et al., 2003).…”

Section: Introductionmentioning

confidence: 99%

Nitrogen fertilizer and tillage intensity affected winter wheat macronutrient uptake and utilization efficiencies

Obour

Holman

Simón

et al. 2023

Agrosystems Geosci & Env

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Application of N fertilizer and no-tillage (NT) can increase winter wheat (Triticum aestivum L) production through improvements in plant available soil water and nutrient availability. However, long-term tillage and N management interaction effects on winter wheat nutrient uptake are not well known. The objective of this study was to quantify winter wheat grain yield, macronutrient removal, and utilization responses to N fertilizer application and tillage intensity. The study was conducted in 2019 and 2020 at Hays, Kansas after 45 years of tillage and N fertility experiment. Treatments were a combination of two tillage practices (CT, conventional tillage; NT) and four rates of N (0, 45, 90, and 134 kg ha −1 ). Results showed a significant tillage and N fertilizer interaction effect on wheat grain yield, nutrient removal (NR) (grain-N, -P, -K, -Mg; stover-K, and total P), and nutrient concentration (stover-K and -S). Two different quadratic models fit the N rate-to-yield relation for CT and NT with yields of 4.3 and 5.2 Mg ha −1 at agronomic optimal N rates of 119 and 199 kg N ha −1 , respectively. This suggests that the N rates were not high enough to predict optimum N rate for NT in this environment. With an average yield of 3.30 Mg ha −1 , wheat removed about 113 kg N ha −1 , 17 kg P ha −1 , 56 kg K ha −1 , 7 kg Ca ha −1 , 8 kg Mg ha −1 , and 8 kg S ha −1 , irrespective of tillage practice. Grain yields and NR were greater for CT at smaller N rates (<90 kg N ha −1 ) and for NT at greater N rates (>90 kg ha −1 ). Findings of the study suggest that adequate N fertility (>90 kg ha −1 ) should be maintained to improve grain yield, nutrient uptake, and utilization efficiency in dryland NT wheat production systems.

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Improving winter wheat grain yield and nitrogen use efficiency using nitrogen application time and rate

Cited by 7 publications

References 58 publications

The Effect of N Fertilizer Application Timing on Wheat Yield on Chernozem Soil

The Effect of N Fertilizer Application Timing on Wheat Yield on Chernozem Soil

Continuous winter wheat response to nitrogen fertilizer rate in long‐term reduced tillage semi‐arid variable yield environments

Nitrogen fertilizer and tillage intensity affected winter wheat macronutrient uptake and utilization efficiencies

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