Winter canola response to soil and fertilizer nitrogen in semiarid Mediterranean conditions

Porter, Marissa J.; Pan, William L.; Schillinger, William F.; Madsen, Isaac J.; Sowers, Karen E.; Tao, Haiying

doi:10.1002/agj2.20119

Cited by 11 publications

(12 citation statements)

References 29 publications

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“…Canola (Brassica napus L.) is the third most important source of vegetable oil after soybean [Glycine max (L.) Merr.] and corn (Zea mays L.) and the second-largest source of feed meal for animals after soybean in the United States (U.S. Canola is well adapted to semiarid environments because of its deep taproot system and a unique growth pattern, allowing the utilization of nutrients from a deeper soil profile and increasing resilience under extreme weather conditions (Porter et al, 2020). Compared to spring canola, winter canola has 20-30% and 50-100% higher yield potential in the semiarid southern Great Plains (Boyles et al, 2012) and the inland Pacific North West (Sowers, 2018) of the United States, making it a promising alternative rotational crop for semiarid regions.…”

Section: Introductionmentioning

confidence: 99%

Winter canola yield and nitrogen use efficiency in a semiarid irrigated condition

et al. 2021

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Winter canola (Brassica napus L.) is an economically viable alternative crop for the semiarid southern Great Plains of the United States. Although land area under winter canola has increased in recent years, an independent guideline on fertility recommendation and their effects on crop growth and soil health is not available for the semiarid southern Great Plains region. This study aimed to evaluate winter canola growth, yield components, and nitrogen use efficiency (NUE) with different nitrogen application timings (NATs) in a semiarid irrigated condition. A 2-yr study was designed with two canola varieties (Riley and 46W94) and four NATs. Nitrogen treatments were F100 (100% of nitrogen applied in fall), S100 (100% of nitrogen applied in spring), FS50 (50% of nitrogen applied in fall and 50% in spring), and FSB25 (25% of nitrogen applied in fall, 25% in spring, and 25% before flowering). The winter dry matter accumulation was greater with the F100 N application, whereas the forage quality was better with the FS50 treatment. The highest seed yield of 2,539 kg ha -1 was from S100, which was not significantly different from FS50 and FSB25. The N use efficiency was the highest under FSB25, which uses 25% less N, followed by S100, FS50, and F100 treatments. The FS50 with 50% of N application in fall and 50% in spring was the most efficient N timing treatment when winter biomass accumulation, seed yield, and seed oil and protein contents were considered.Abbreviations: ADF, acid detergent fiber; F100, 100% of nitrogen applied in fall; FS50, 50% of nitrogen applied in fall and 50% in spring; FSB25, 25% of nitrogen applied in fall, 25% in spring, and 25% before flowering; NAT, nitrogen application timing; NDF, neutral detergent fiber; NUE, nitrogen use efficiency; RFV, relative feed value; S100, 100% of nitrogen in spring; TDN, total digestible nutrient

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Section: Introductionmentioning

confidence: 99%

Winter canola yield and nitrogen use efficiency in a semiarid irrigated condition

et al. 2021

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“…Evening Primrose produced 54.4% less seed compared to Rapeseed, but differences in yield between the two species reduced when N fertilizer was applied, suggesting a lower ability of the Evening Primrose to grow under non-optimal N conditions when compared to Rapeseed. In experiments not directly comparing these species, a similar response to N was found in Evening Primrose [20,40], Canola [41,42], and Carinata [43]. Evening Primrose and Rapeseed usually show a similar total biomass production [44,45], thus the main reason for yield differences is likely due to a low harvest index of the Evening Primrose.…”

Section: Discussionmentioning

confidence: 74%

Evening Primrose and Rapeseed Yield Components and Grain Oil Concentrations Were Differentially Modulated by the N, P, and K Supplies in a Mediterranean Area

et al. 2021

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Evening Primrose (Oenothera biennis L.) is an industrial crop-producing seed with high oil concentration characterized by high gamma-linoleic acid. However, limited information is available on its response to the nutrient supply, especially P and K. The aim of this work was to compare the response of Evening Primrose to the application of N, P, and K alone or in combination in a P and K deficient soil in terms of grain yield, yield components, and oil composition in comparison to Rapeseed (Brassica napus L.). Evening Primrose yielded 54.4% less seed and 67.3% less oil than Rapeseed. Such differences were reduced when nutrients, especially N or P, were applied. N stimulated Evening Primrose more than Rapeseed. Application of K favored Evening Primrose oil yield when no N or P were added, and this especially occurred by an enhancement of the pod number. P favored yield per pod and oil yield in the Evening Primrose more than Rapeseed in almost all conditions. Fertilization scarcely affected lipid composition. In particular, an increase in the oleic acid concentration was found only when N + K or N + P + K were applied compared to the sole N or sole K applications. These results suggest that P and K differentially influenced yield components of both species and that Evening Primrose was less adapted than Rapeseed to a scarce nutrient supply.

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“…Therefore, different cultivars of winter canola or environments may require different N rates to attain optimal seed yields. Porter et al (2019) observed little effect of N on winter canola yields in Washington State, which were mainly affected by water availability and residual soil N concentrations. In Pakistan, Cheema et al (2001) observed significantly enhanced seed yield with increasing N…”

Section: Introductionmentioning

confidence: 80%

“…Porter et al. (2019) observed little effect of N on winter canola yields in Washington State, which were mainly affected by water availability and residual soil N concentrations. In Pakistan, Cheema et al.…”

Section: Introductionmentioning

confidence: 99%

Effect of winter canola cultivar on seed yield, oil, and protein content

McGeary

Koff

Pokharel

et al. 2022

Agrosystems Geosci & Env

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Winter canola (Brassica napus L.) production has increased in the United States over the past several decades; however, there is little research in the southeastern United States on its agronomic production and growth characteristics under different nitrogen (N) fertilizer rates. The objectives of this study were to determine the effects of N rates on winter mortality, yield, oil and protein content, and seedpod shatter resistance across cultivars. Canola was grown in a randomized split complete block design with four replicates under five different N rates (0, 56, 112, 168, and 224 kg N ha−1) with four different cultivars (Hekip, Inspiration, and Edimax CL or Phoenix CL). Seed yield was very low for the 2017–2018 season, likely due to extreme cold conditions in winter and/or frost at flowering. There was high winter mortality during this period, but Edimax CL had significantly lower mortality (79.7%) than Inspiration (85.7%) and Hekip (83.9%). In the following year, more mild temperatures led to low mortality and greater yields, where rates of 112, 168, and 224 kg N ha−1 had the greatest yields (1,612–1,857 kg ha−1) with no significant differences according to cultivar. In 2018, shatter resistance was greatest for the rates of 112, 168, and 224 kg N ha−1 and was positively related to N rate. Across both years, Inspiration had greater shatter resistance. In 2019, the lowest N rate (0 kg N ha−1) and Phoenix CL had significantly greater oil contents (48.4 and 47.3%, respectively), whereas the highest N rate (224 kg N ha−1) with no particular cultivar had a significantly greater protein content (21.0%).

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Winter canola response to soil and fertilizer nitrogen in semiarid Mediterranean conditions

Cited by 11 publications

References 29 publications

Winter canola yield and nitrogen use efficiency in a semiarid irrigated condition

Winter canola yield and nitrogen use efficiency in a semiarid irrigated condition

Evening Primrose and Rapeseed Yield Components and Grain Oil Concentrations Were Differentially Modulated by the N, P, and K Supplies in a Mediterranean Area

Effect of winter canola cultivar on seed yield, oil, and protein content

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