Variability in Winter Wheat (<i>Triticum aestivum</i> L.) Grain Yield Response to Nitrogen Fertilization in Long-Term Experiments

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

doi:10.1080/00103624.2019.1709489

Cited by 11 publications

(8 citation statements)

References 26 publications

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“…This nutrient plays an important role in plant nutrition and development (Lollato et al, 2019), such as synthesis and production of phytohormones, coenzymes, nucleic acids, secondary metabolites, chlorophyll, and proteins (Krapp, 2015;Gojon, 2017;Ghimire et al, 2017). There is a lot of studies reporting the benefits of N fertilization in different cereal crops such as corn (Ichami et al, 2019), wheat (Omara et al, 2020), and rice (Tatsumi et al, 2019). The optimum amount of N required for best cereal production depends on many factors, including soil type, indigenous nutrient concentration in the soil, weather conditions, and others (Sanchez et al, 2019).…”

Section: Resultsmentioning

confidence: 99%

Humic acid and nitrogen dose application in corn crop under alkaline soil conditions

Azeem

Naz

Jalal

et al. 2021

Rev. bras. eng. agríc. ambient.

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Humic acid (HA), as a bio-stimulant and a major component of organic matter (OM), can improve plant physiology, soil fertility, and nutrient availability, mainly in low OM soils. Nitrogen (N) is one of the most important nutrients that affect several metabolic and biochemical activities, leading to improved plant development. This study was conducted to investigate the combined effect of HA and N doses on soil organic matter (SOM) and total N concentration, N uptake, corn growth, and grain yield under conventional tillage at Peshawar, Pakistan. Treatments were tested in a randomized block design with four replicates arranged in a factorial scheme 3 × 4 + 1. The respective doses of HA (1.5, 3,0 and 4.5 kg ha-1) were applied at the corn sowing, whereas N doses (80, 120, 160, and 200 kg ha-1) were applied in three splits (1/3 at sowing, 1/3 at the V5 stage, and remaining 1/3 at the tasselling stage) with one control (no HA and N). The application of HA, regardless of the applied doses, had positive effects on SOM, N concentration, N uptake, corn development, and grain yield. However, the application of 4.5 kg ha-1 of HA was the most effective in promoting SOM (0.83%) and total N (0.31%), shoot biomass (10610 kg ha-1), N uptake (1.13%), and grain yield (3780 kg ha-1), even when combined with the N doses of 80, 120 and 160 kg N ha-1. Increasing N doses positively influenced SOM, N concentration, N uptake, and corn growth. The greatest grain yield was obtained at 150 kg ha-1 of N regardless of HA applied doses.

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Section: Resultsmentioning

confidence: 99%

Humic acid and nitrogen dose application in corn crop under alkaline soil conditions

Azeem

Naz

Jalal

et al. 2021

Rev. bras. eng. agríc. ambient.

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“…It is important to note the magnitude of response reported in this study, where RI Yield reached 10.1, or a 10-fold increase in yield from the 0 N check to full fertilized plots. Many nitrogen response studies have been conducted in Oklahoma over the past two decades and report an average "high" response of 2.0 [27][28][29][30]. While the exceptional high achieved yield response could be an artifact of varying locale or environment in one growing season, it is certainly uncommon and creates challenges when comparing the results to existing literature.…”

Section: Discussionmentioning

confidence: 99%

Predicting Winter Wheat Grain Yield Using Fractional Green Canopy Cover (FGCC)

Reed

Arnall

Finch

et al. 2021

International Journal of Agronomy

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Optical sensors have grown in popularity for estimating plant health, and they form the basis of midseason yield estimations and nitrogen (N) fertilizer recommendations, such as the Oklahoma State University (OSU) nitrogen fertilization optimization algorithm (NFOA). That algorithm uses measurements of normalized difference vegetative index (NDVI), yet not all producers have access to the sensors required to make these measurements. In contrast, most producers have access to smartphones, which can measure fractional green canopy cover (FGCC) using the Canopeo app, but the usefulness of these measurements for midseason yield estimations remains untested. Our objectives were to (1) quantify the relationship between NDVI and FGCC, (2) assess the potential for using FGCC values in place of NDVI values in the current OSU Yield Prediction Model, and (3) compare the performance of NDVI and FGCC-based yield prediction models from the collected dataset. This project, implemented on 13 winter wheat sites over the 2019-2020 growing season, used a range of nitrogen (N) rates (0, 34, 67, 101, and 134 kg N ha−1) to provide different levels of yield. Our results indicated that while NDVI and FGCC are highly correlated (r2 = 0.76), FGCC is not suitable for direct insertion into the current yield prediction model. However, a yield prediction model derived from FGCC provided similar estimates of yield compared to NDVI (Nash Sutcliffe Efficiency = −3.3). This new FGCC-based model will give more producers access to sensor-based yield prediction and N rate recommendations.

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“…However, seed treatment with fungicides may be toxic to these microorganisms and might affect the efficiency of the Azospirillum as well as other PGPR (Yang, Hamel, Vujanovic, & Gan, 2011), which is not a part of the organic agriculture scope. Thus, post-emergence inoculation may be the alternative (Fukami et al, 2016;Galindo et al, 2019;Omara et al, 2020). Furthermore, Andrade, Zoz, Zoz, Oliveira, and Witt (2019) applied A. brasilense in the seeds and verified lower percentage and index of seedling emergence in some genotypes.…”

Section: Introductionmentioning

confidence: 92%

Methods of inoculation of plant growth-promoting rhizobacteria in specialty maize genotypes under organic agriculture system

et al. 2022

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Organic agriculture systems have the nutrients supplied by plant or animal by-products, bioinoculants, and compost-based products as earthworm composts and green manures. However, the quantitative and qualitative parameters of soil amendments depend on their sources, and soil amendments are generally not sufficient to supply the nutritional requirements of maize crops. Moreover, specialty maize requires high levels of N. Thus, the aim of this study was to investigate specialty maize varieties supplied with two microbial inoculants applied in two inoculation methods. These factorial treatments were compared with their checks (varieties without inoculation), and the interaction among these factors was also investigated. The trials were carried out during the growing season in 2017–2018 in the State University of Maringá. The popcorn trial followed the randomized complete block design where the factorial 3 × 2 × 2 + 3 had five replications. The trial with white grits maize followed the same experimental design but the factorial scheme was 2 × 2 × 2 + 2 with three replications. Both trials had maize varieties and two species of microbial inoculants (Azospirillum brasilense and Methylobacterium sp.) applied in two inoculation methods, in the seeds and the foliar spray at V4 stage of plant development. The response traits were grain yield and the components of crop production. In both trials, we verified that the majority of the interactions among the factors was non-significant (p > 0.05), indicating the independence of these factors. Furthermore, the microbial inoculants had no beneficial effects on the traits. The possibility of a higher crop yield did not confirm the application of the inoculant in the stage V4. The organic compost may be the key point in mitigating the treatments with microbial inoculants due to the availability of N in the first stages of plant development. The traits also suggest the necessity of more trials about the influence of microbial inoculants on specialty maize production.

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Variability in Winter Wheat (Triticum aestivum L.) Grain Yield Response to Nitrogen Fertilization in Long-Term Experiments

Cited by 11 publications

References 26 publications

Humic acid and nitrogen dose application in corn crop under alkaline soil conditions

Humic acid and nitrogen dose application in corn crop under alkaline soil conditions

Predicting Winter Wheat Grain Yield Using Fractional Green Canopy Cover (FGCC)

Methods of inoculation of plant growth-promoting rhizobacteria in specialty maize genotypes under organic agriculture system

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