Nitrogen accumulation, partition, and nitrogen-use efficiency in canola under different nitrogen availabilities

Chamorro, Adriana Mabel; Tamagno, Lía Nora; Bezus, Rodolfo; Sarandón, Santiago Javier

doi:10.1081/css-120002759

Cited by 42 publications

(38 citation statements)

References 13 publications

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“…These values are comparable with those reported in other studies (Chamorro et al 2002;Malhi and Gill 2007). However, because of the higher seed yields, N yields at Indian Head were higher than those at Scott.…”

Section: Seed and Seed Nitrogen Yieldssupporting

confidence: 90%

“…Mean ANUE tended to be higher at Indian Head than at Scott because of the higher seed yields and greater overall response to N fertilizer at Indian Head (Table 9). The observed ANUE values fell within the ranges reported for canola in other studies (Smith et al 1988;Chamorro et al 2002;Hocking et al 2002), ranging from as low as 1.2 kg kg…”

Section: Seed and Seed Nitrogen Yieldssupporting

confidence: 90%

“…(1 (Chamorro et al 2002). The ANUE values observed in the current study were lower than the average of 26.4 kg kg (1 reported by Gan et al (2008) for 11 site-years across a range of environments in Saskatchewan; however, the trend was same in that ANUE decreased with increasing N rates.…”

Section: Seed and Seed Nitrogen Yieldscontrasting

confidence: 72%

“…Because of lower seed yields, less grain N was harvested from the RN treatment than for the combined VRN treatments at Indian Head in 2007 (P 00.031). Both Chamorro et al (2002) and Malhi and Gill (2007) found that grain N yields often increased when the amount of N applied was increased up to 150 kg N ha (Table 8). While the data from Scott in 2005 was highly variable, the observed mean soil NO 3 -N concentrations of both the SFN and NR treatments tended to be higher than the other treatments.…”

Section: Seed and Seed Nitrogen Yieldsmentioning

confidence: 99%

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Optical sensors have potential for determining nitrogen fertilizer topdressing requirements of canola in Saskatchewan

Holzapfel¹,

Lafond²,

Brandt³

et al. 2009

Can. J. Plant Sci.

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. Optical sensors have potential for determining nitrogen fertilizer topdressing requirements of canola in Saskatchewan. Can. J. Plant. Sci. 89: 411Á425. An important challenge in N management is matching fertilizer inputs to crop requirements for specific environmental conditions. Field experiments were completed over 3 yr at two locations in Saskatchewan to evaluate the feasibility of using optical sensors and high-N reference plots along with topdressed liquid urea ammoniumnitrate (UAN) to arrive at more optimal N rates for canola (Brassica napus L.). Treatments included N management strategies where the timing and methods of application were varied along with the total quantities of N applied. Sensorbased N management was compared with the predominant practice of banding predetermined amounts of N at seeding. On average, sensor-based N management resulted in a 34 kg N ha(1 reduction in fertilizer use with no effect on seed yields except at Indian Head in 2006 where dry conditions resulted in yield reductions of 370 to 454 kg ha(1 compared with applying canola's entire N requirements at seeding. Sensor-based N management or split-N applications never increased yields relative to applying all N at seeding. Adopting this technology in western Canada will more likely result in reduced N inputs without reducing yield than increased seed yield. While sensor-based N management did not reduce post-harvest residual soil NO 3 -N levels, agronomic N use efficiency (ANUE) was increased 33% of the time and was never lessened. When significant, the increase in ANUE ranged from 4.8 to 7.8 kg seed kg N applied 2009. Les capteurs optiques permettraient d'e´tablir la quantite´d'engrais azote´s a`appliquer en couverture pour la culture du canola en Saskatchewan. Can. J. Plant. Sci. 89: 411Á425. Une grande difficulte´dans la gestion des engrais azote´s (N) consiste a`faire concorder les applications aux exigences de la culture selon les conditions ambiantes. Les auteurs ont proce´de´a`une expe´rience de trois ans sur le terrain, a`deux endroits de la Saskatchewan, afin d'e´tablir si on pourrait se servir de capteurs optiques et de parcelles de re´fe´rence a`forte concentration de N pour e´pandre en couverture un engrais liquide a`base d'ure´e et de nitrate d'ammonium et parvenir a`un taux d'application mieux adapte´au canola (Brassica napus L.). Les traitements incluaient des strate´gies de gestion de l'azote en vertu desquelles le moment et la me´thode d'application variaient avec la quantite´totale de N applique´e. On a compare´la gestion des engrais N avec des capteurs a`la pratique la plus courante, qui consiste a`e´pandre une quantite´de´termine´e d'engrais en bande lors des semis. En moyenne, la gestion des engrais N s'appuyant sur des capteurs a diminue´la quantite´d'engrais employe´e de 34 kg de N par hectare, comparativement al 'application de la quantite´totale d'engrais recommande´e pour le canola aux semis. Le rendement grainier n'en a pas souffert, sauf a`Indian Head, en 2006, ou`la se´cheresse l'a re´duit de 370 a...

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Section: Seed and Seed Nitrogen Yieldssupporting

confidence: 90%

Section: Seed and Seed Nitrogen Yieldssupporting

confidence: 90%

Section: Seed and Seed Nitrogen Yieldscontrasting

confidence: 72%

Section: Seed and Seed Nitrogen Yieldsmentioning

confidence: 99%

See 2 more Smart Citations

Optical sensors have potential for determining nitrogen fertilizer topdressing requirements of canola in Saskatchewan

Holzapfel¹,

Lafond²,

Brandt³

et al. 2009

Can. J. Plant Sci.

View full text Add to dashboard Cite

show abstract

“…Because further increases in yield diminishes along with further increases in the amount of applied N fertilizer , that is, the efficiency of N utilization decreases as yield increases (Akintoye et al, 1999). It is well known that NUE decreases with increment of N availability (Chamoro et al, 2002;Svecnjak and Rengel, 2006).…”

Section: Nitrogen Use Efficiency (Nue)mentioning

confidence: 99%

Management of nitrogen fertilizer, irrigation and plant density in onion production using response surface methodology as optimization approach

Mansouri¹,

Bannayan²,

Moghaddam³

et al. 2014

Afr. J. Agric. Res.

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Evaluation of temporal variability on tissue nutrient concentrations of canola

Reed

Sutradhar

Arnall

et al. 2022

Agrosystems Geosci & Env

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The use of plant tissue analysis as a tool for diagnosing nutrient deficiency has steadily gained interest by producers and crop advisors in Oklahoma. A study was conducted during the 2012–2013 and 2015–2016 growing seasons at two locations near Stillwater and Perry, OK, to evaluate the variability of canola (Brassica napus L.) nutrient concentrations across various growth stages (STAGE), among several days within each growth stage (DAY), across several times during the day (TIME). Canola tissue samples were collected in the morning, noon, and evening for three consecutive days at rosette, postdormancy break, and prebolting stages. Samples were analyzed for macronutrients (N, P, K) and secondary (S, Ca, Mg) nutrient concentrations. Tissue nutrient concentrations were found to be extremely variable, as affected by main effects and interactions of sampling TIME, DAY, and STAGE. Nutrient concentration generally increased over time, for most nutrients. The analysis did not indicate any definitive pattern of tissue nutrient accumulation based on the fixed effects TIME and DAY. Although, the exact reasons for the different responses are not known, they may be related to soil physical and chemical property differences and variation in weather factors. While this work does not provide insight in the relationship between nutrient concentrations and crop yield, this does bring to light complications with using tissue analysis for management decisions. Further work must be done to investigate the relationships of tissue concentration and yield, and the viability of tissue sampling for nutrient management.

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Nitrogen accumulation, partition, and nitrogen-use efficiency in canola under different nitrogen availabilities

Cited by 42 publications

References 13 publications

Optical sensors have potential for determining nitrogen fertilizer topdressing requirements of canola in Saskatchewan

Optical sensors have potential for determining nitrogen fertilizer topdressing requirements of canola in Saskatchewan

Management of nitrogen fertilizer, irrigation and plant density in onion production using response surface methodology as optimization approach

Evaluation of temporal variability on tissue nutrient concentrations of canola

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