Nitrogen utilization efficiency in maize as affected by hybrid and N rate in late-sown crops

Caviglia, Octavio Pedro; Melchiori, Roberto; Sadras, Víctor O.

doi:10.1016/j.fcr.2014.08.005

Cited by 64 publications

(35 citation statements)

References 52 publications

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“…In this study, NHI increased with increasing N fertilizer application. This is consistent with other studies in maize (Mason and D'croz‐Mason, 2002; Caviglia et al, 2014) that have indicated improved NHI with increasing N application.…”

Section: Discussionsupporting

confidence: 93%

Response of Maize to Cover Crops, Fertilizer Nitrogen Rates, and Economic Return

et al. 2016

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Leguminous cover crops are considered part of sustainable agricultural systems. With the development of no-till cropping systems, cover crops have been recognized for their ability to provide N for succeeding crops. Th e objectives of this study were: (i) to determine the N contribution of summer cover crops and double-cropped grain crops following winter wheat (Triticum aestivum L.) and N rates to subsequent maize (Zea mays L.) crops' physiological traits and yield, (ii) to calculate the fertilizer N replacement value, and (iii) to perform economic analyses of the cropping systems. in the rotation over the fallow system with 0 kg N ha -1 was 78, 91, 66, 72, and 12%, respectively. Fertilizer N replacement values for cowpea, pigeonpea, sunn hemp, double-cropped soybean, and double-cropped grain sorghum were 53, 64, 43, 47, and -5 kg N ha -1 , respectively. We conclude that the inclusion of summer leguminous cover crops in a cropping system has the potential to reduce or supplement N requirements and increase the grain yield of subsequent maize crops.

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Section: Discussionsupporting

confidence: 93%

Response of Maize to Cover Crops, Fertilizer Nitrogen Rates, and Economic Return

et al. 2016

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“…Various parameters are commonly used in agronomic research to evaluate the efficiency of the response of crops to applied N. Both from a physiological and agronomic point of view, N use efficiency (NUE) is the result of two main biological processes: N uptake efficiency (NUpE), which is the ability of a crop to produce yield per unit of N available in the soil, and N utilization efficiency (NUtE) which is the ability of a crop to produce yield per unit of N taken up [9][10][11][12][13][14]. In field studies, other parameters can be calculated based on differences in crop yield or total N uptake between fertilized plots and Agronomy 2017, 7, 66 2 of 15 unfertilized controls using the 'difference method' [12,[15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Investigating the Combined Effect of Tillage, Nitrogen Fertilization and Cover Crops on Nitrogen Use Efficiency in Winter Wheat

et al. 2017

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A field study was conducted in northern France over two consecutive years to evaluate the combined effect of conventional tillage (CT) vs no till (NT) with or without cover crops (cc) and nitrogen (N) fertilization on various agronomic traits related to N use efficiency in winter wheat. Five years after conversion of CT to NT, significant increases in N use efficiency, N utilization efficiency, N agronomic efficiency, N partial factor productivity, N apparent recovery fraction and N remobilization were observed under three N fertilization regimes (0, 161, 215 kg ha −1 ). It was also observed that grain yield and grain N content were similar under CT and NT. The N nutrition index was higher under NT at the three rates of N fertilization. Moreover, N use efficiency related traits were increased in the presence of cc both under NT and CT. Thus, agronomic practices based on continuous NT in the presence of cc, appear to be promising strategies to increase N use efficiency in wheat, while reducing both the use and the loss of N-based fertilizers.

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“…First, daily mean temperature correlates with both minimum and maximum temperature, radiation, photoperiod and vapour pressure deficit, and it may also correlate with rainfall (Rodriguez and Sadras, 2007). Sowing date changes the pattern of supply and demand for both water (Gimeno et al, 1989) and nitrogen (Caviglia et al, 2014). Second, temperature alters the genotype-dependent phenological development of crops (Slafer et al, 2015), effectively shifting the timing and duration of critical periods against the background of temperature and other environmental variables (Fig.…”

Section: Introductionmentioning

confidence: 99%

Unscrambling confounded effects of sowing date trials to screen for crop adaptation to high temperature

Sadras

Vadez

Ramamoorthy

et al. 2015

Field Crops Research

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Against the backdrop of climate change, genotypes with improved adaptation to elevated temperature are required; reliable screening methods are therefore important. Sowing date experiments are a practical and inexpensive approach for comparison of large collections of lines. Late-sown crops usually experience hotter conditions and phenotypes thus partially capture this environmental influence. Two sets of confounded factors, however, limit the value of sowing date trials. First, daily mean temperature correlates with both minimum and maximum temperature, photoperiod, radiation and vapour pressure deficit, and it may also correlate with rainfall. Second, temperature alters the genotype-dependent phenology of crops, effectively shifting the timing and duration of critical periods against the background of temperature and other environmental variables. Here we advance a crop-level framework to unscramble the confounded effects of sowing date experiments; it is based on four physiological concepts: (1) annual crops accommodate environmental variation through seed number rather than seed size; (2) seed number is most responsive to the environment in species-specific critical windows; (3) non-stressful thermal effects affecting seed set through development and canopy size can be integrated in a photothermal quotient relating intercepted photosynthetically active radiation (PAR) and mean temperature during the critical window; (4) stressful temperature reduces yield by disrupting reproduction. The framework was tested in a factorial experiment combining four chickpea varieties with putatively contrasting adaptation to thermal stress and five environments resulting from the combination of seasons and sowing dates. Yield ranged from 13 to 577 gm. Shifts in phenology led to contrasting photothermal conditions in the critical window between flowering and 400 degrees C d after flowering that were specific for each variety-environment combination. The photothermal quotient ranged from 2.72 to 6.85 Mi m(-2)degrees C-1; it explained 50% of the variation in yield and maximum temperature explained 32% of the remaining variation. Thus, half of the variation in yield was associated with developmental, non-stressful thermal effect and (at most) 16% of the variation was attributable to thermal stress. The photothermal quotient corrected by vapour pressure deficit accounted for by 75% of the variation in yield and provided further insight on photosynthesis-mediated responses to temperature. Crop adaptation to non-stressful, developmental thermal effects and stressful temperatures disrupting reproduction involve different physiological processes and requires partially different agronomic and breeding solutions. Our analytical approach partially separates these effects, adds value to sowing date trials, and is likely to return more robust rankings of varieties

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Nitrogen utilization efficiency in maize as affected by hybrid and N rate in late-sown crops

Cited by 64 publications

References 52 publications

Response of Maize to Cover Crops, Fertilizer Nitrogen Rates, and Economic Return

Response of Maize to Cover Crops, Fertilizer Nitrogen Rates, and Economic Return

Investigating the Combined Effect of Tillage, Nitrogen Fertilization and Cover Crops on Nitrogen Use Efficiency in Winter Wheat

Unscrambling confounded effects of sowing date trials to screen for crop adaptation to high temperature

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