Identifying oilseed rape varieties with high yield and low nitrogen fertiliser requirement

Storer, Kate; Berry, Pete; Kindred, D. R.; Sylvester‐Bradley, R.

doi:10.1016/j.fcr.2018.06.005

Cited by 19 publications

(12 citation statements)

References 22 publications

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“…The former measures crop ability in N capture, while the latter reflects the efficiency of N conversion [10]. Although the definition of NUE and its key components has been well established for decades, the estimation of these variables in oilseed rape is complex, since their importance in determining seed yield depend on N availability and how the N absorbed is used within crop during different growth stages, and may vary between different cultivars [2,5,[13][14][15].…”

Section: Of 17mentioning

confidence: 99%

“…A large body of research has been developed in recent years focusing on the improvement in oilseed rape yield (or NUE) through the key determining components or processes [2,5,[15][16][17][18]. It is generally recognized that varietal difference in seed yield is more closely associated with N uptake at N limiting conditions, while the importance of N utilization efficiency increases with higher N supply [2,19,20].…”

Section: Of 17mentioning

confidence: 99%

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Dynamics of Growth and Nitrogen Capture in Winter Oilseed Rape Hybrid and Line Cultivars under Contrasting N Supply

Zhang

Ren

et al. 2020

Agronomy

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Cultivation of winter oilseed rape hybrids has been introduced as a promising solution to improve the nitrogen use efficiency (NUE) and to reduce the large N balance surpluses in this crop. To achieve a better understanding of the underlying physiological mechanisms, field experiments were conducted over two years to investigate the dynamics of growth and N capture in an oilseed rape hybrid and its parental lines under both low (0 kg ha−1) and high (180 kg ha−1) N supply. The results showed that the dynamic trajectories of crop growth and N capture could be accurately characterized by logistic equation using growing degree days as the independent variable. At both N rates, the oilseed rape hybrid outperformed the parental lines in seed yield and aboveground biomass accumulation, which was more closely associated with the longer duration (td) of the rapid growth period (RGP), than with the higher maximum growth rate (vm). N uptake was the main factor driving genotypic variation in seed yield, with an increasing importance of N utilization efficiency at high N supply. The hybrid had significantly higher N uptake than the parental lines at both low and high N supply, because of larger vm for N accumulation during the RGP, which may present a scope for genetically improving NUE in oilseed rape. High N application enhanced crop biomass production and N accumulation, as a result of prolonged td and larger vm during the RGP. The initiation of RGP for N accumulation occurred after overwinter period, which could not be accelerated by high N supply, suggesting rational distribution of N fertilizer with reduced basal dose. However, larger amounts in spring would be beneficial for a better synchronization to crop N demand with lower environmental risks.

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Section: Of 17mentioning

confidence: 99%

Section: Of 17mentioning

confidence: 99%

Dynamics of Growth and Nitrogen Capture in Winter Oilseed Rape Hybrid and Line Cultivars under Contrasting N Supply

Zhang

Ren

et al. 2020

Agronomy

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“…It is possible that the abundancy of above-ground biomass, characterized by the NDVI-values, does not associate well with tuber yields, which causes uncertainty in estimations of the pre-crop values. The harvest index (HI) for potatoes is high and quite variable (Chang et al, 2016, 2018) compared to that of cereals, rapeseed and grain legumes (Peltonen-Sainio et al, 2008; Gómez et al, 2017; Storer et al, 2018). The value of spring barley, wheat and faba beans as pre-crop for annual production grasslands was negative, but data was scarce and available only for one year.…”

Section: Discussionmentioning

confidence: 99%

Pre-crop Values From Satellite Images for Various Previous and Subsequent Crop Combinations

et al. 2019

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Monocultural land use challenges sustainability of agriculture. Pre-crop value indicates the benefits of a previous crop for a subsequent crop in crop sequencing and facilitates diversification of agricultural systems. Traditional field experiments are resource intensive and evaluate pre-crop values only for a limited number of previous and subsequent crops. We developed a dynamic method based on Sentinel-2 derived Normalized Difference Vegetation Index (NDVI) values to estimate pre-crop values on a field parcel scale. The NDVI-values were compared to the region specific 90th percentile of each crop and year and thereby, an NDVI-gap was determined. The NDVI-gaps for each subsequent crop in the case of monocultural crop sequencing were compared to that for other previous crops in rotation and thereby, pre-crop values for a high number of previous and subsequent crop combinations were estimated. The pre-crop values ranged from +16% to -16%. Especially grain legumes and rapeseed were valuable as pre-crops, which is well in line with results from field experiments. Such data on pre-crop values can be updated and expanded every year. For the first time, a high number of previous and following crop combinations, originating from farmer’s fields, is available to support diversification of currently monocultural crop sequencing patterns in agriculture.

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“…Therefore, considerable researches and extension works were undertaken to improve the N use efficiency (Chen et al, 2014b;Hou et al, 2019). The use of foxtail millet cultivars with higher-NUE is an important approach for sustainable agriculture (Storer et al, 2018;Haegele et al, 2013;Chen et al, 2014b). Although a lot of research on the genetic differences in NUE have been reported for most cereal crops -including wheat, rice, maize, sorghum, and barley (Kant et al, 2011;Ju et al, 2015) -, they are not yet known for such differences in foxtail millet.…”

Section: Introductionmentioning

confidence: 99%

Variability of nitrogen use efficiency by foxtail millet cultivars at the seedling stage

Chen

Qin

Yang

et al. 2020

Pesq. agropec. bras.

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The objective of this work was to identify the genetic variation of foxtail millet (Setaria italica) cultivars, from three ecogeographic origins in China, regarding the uptake and utilization of N by the genotypes at the seedling stage, aiming at the genetic improvement of this crop. Seedlings of 79 cultivars were fertilized with a nutrient solution, on a sand substrate, and evaluated under low-N (LN, 0.2 mmol L-1) and high-N (HN, 6.0 mmol L-1) concentrations. A large variation was observed between cultivars, among the three ecogeographic regions, for shoot biomass, shoot N content and concentration, and N use efficiency (NUE), uptake efficiency (NupE), and utilization efficiency (NutE), especially under HN conditions. Cultivars of Northwest China showed the highest variation for shoot biomass, N content, NUE, and NupE. A strong positive correlation was observed between NUE and NupE, and NUE and NutE, but there was no correlation between NupE and NutE. NupE accounted for 77.6% of the total variation of NUE, and NutE for the rest. The uptake and utilization of N show a large variation among the foxtail millet cultivars at the seedling stage, and the variation of N uptake contributes more than that of N utilization to the variation of N use efficiency.

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Identifying oilseed rape varieties with high yield and low nitrogen fertiliser requirement

Cited by 19 publications

References 22 publications

Dynamics of Growth and Nitrogen Capture in Winter Oilseed Rape Hybrid and Line Cultivars under Contrasting N Supply

Dynamics of Growth and Nitrogen Capture in Winter Oilseed Rape Hybrid and Line Cultivars under Contrasting N Supply

Pre-crop Values From Satellite Images for Various Previous and Subsequent Crop Combinations

Variability of nitrogen use efficiency by foxtail millet cultivars at the seedling stage

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