Improving Nitrogen Use Efficiency for Cereal Production

Raun, W. R.; Johnson, G. V.

doi:10.2134/agronj1999.00021962009100030001x

Cited by 1,541 publications

(1,050 citation statements)

References 72 publications

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“…In order to ensure sufficient N in soil, farmers frequently supply fertilizers containing nitrate (NO 3 -), ammonium (NH 4 + ), or urea [(CONH 2 ) 2 ] (Miller et al, 2007). Crop plants uptake about 30-40% of total applied N. Remaining fertilizer is lost via leakage into the atmosphere, groundwater, lakes and rivers (Raun and Johnson, 1999;Glass, 2003). Waste amount of fertilizer is responsible for serious environmental pollution in the form of aerosolized nitrous oxides and leaching of soluble nitrates into waterways (Johnson et al, 2007;Doney, 2010;Montzka et al, 2011;Dechorgnat et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Identification and Functional Characterization an Ortholog of OsENOD93-1 Gene in Wheat Using in-silico Approach

Kumar¹,

Kumar²,

Tyagi³

et al. 2018

Int.J.Curr.Microbiol.App.Sci

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Nitrogen is an essential macromolecule necessary for suitable growth and development of plants by playing a vital role in biochemical and physiological functions throughout the life cycle. Early node 93 (ENOD93-1) gene is well known for significantly responding to both N induction and N reduction in plants, but little is known about the structure and function of the ENOD93-1 protein in cereal crops. In this study, a putative ortholog of rice OsENOD93-1 gene was identified in the wheat genome. BLASTP analysis showed the OsENOD93-1 shared the 80% similarity with wheat TRIAE_CS42_4AL_TGACv1_ 288261_AA0942630.1 scaffold. Present study describes the location of TaENOD93-1 gene on4AL chromosome of wheat. MicroRNA target analysis revealed that TaENOD93-1 gene targeting by miR6201. Phylogeny tree suggested that identified putative ortholog shared the evolutionary relationship with monocots. The three dimensional structure of TaENOD93-1 protein was predicted using computer-aided molecular modeling technique followed by structure evaluation using Ramachandran plot. The primary goal of this study was to mapping the chromosomal location and functional annotation of TaENOD93-1 gene in wheat using bioinformatics approach. The identification of putative ortholog of OsENOD93-1 gene in wheat has opened up new opportunities to improve the nitrogen use efficiency (NUE) in wheat through molecular breeding approach. K e y w o r d s

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Section: Introductionmentioning

confidence: 99%

Identification and Functional Characterization an Ortholog of OsENOD93-1 Gene in Wheat Using in-silico Approach

Kumar¹,

Kumar²,

Tyagi³

et al. 2018

Int.J.Curr.Microbiol.App.Sci

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“…Optionally, the NUE is calculated to indicate the efficiency of agricultural production relative to total N. Moreover, the NUE provides an indication of the N surplus that will be dispersed in the environment. The worldwide NUE for cereal production has been estimated at approximately 33 % (Raun and Johnson 1999). The global NUE of industrialized countries has been increasing steadily, from 48 % in 1970 and 49 % in 1995 to its current value of 60 %, and it is expected to reach 62 % in 2030 with the potential for further improvement (Bouwman et al 2005;Cassmann et al 2002;Liu et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Extended statistical entropy analysis for the evaluation of nitrogen budgets in Austria

Sobańtka

Thaler

Zessner

et al. 2013

Int. J. Environ. Sci. Technol.

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Extended statistical entropy analysis (eSEA) is used to evaluate the nitrogen (N) budgets of two Austrian catchments, the Wulka and the Ybbs, and of entire Austria. The eSEA quantifies the extent of N dispersion in the environment. The results from the eSEA are compared to the corresponding N use efficiencies (NUEs). Application of the eSEA reveals that the Ybbs catchment, compared to the Wulka catchment leads to a greater extent of N dispersion, primarily as a result of increased losses of N compounds to the atmosphere and in leachates to the groundwater. The NUE in the Wulka catchment, at 63 %, is substantially higher than that in the Ybbs catchment, at 43 %, and confirms a more efficient N use in Wulka. Furthermore, it is shown that the adoption of a healthy, balanced diet, as defined by the German Nutrition Society, changes the N budget of Austria in a way that significantly reduces the dispersion of N. Decreased N losses to the atmosphere and to the groundwater are primarily responsible for this result. The national NUE of Austria responds only moderately to the adoption of such a diet increasing from 48 to 53 % and leads to statistically insignificant results if the uncertainty of the input data is taken into account. This study demonstrates the effectiveness of eSEA for the evaluation of N budgets in agricultural regions and suggests that statistical entropy can serve as a reliable agri-environmental indicator to support decisions regarding nutrient management.

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“…Potential benefits to producers and the environment have motivated a flurry of research, as well as the development of precision agriculture technologies and techniques to improve nitrogen-use efficiency (NUE) (Cassman et al 1998;Greenhalgh and Faeth 2001;López-Bellido and López-Bellido 2001;López-Bellido et al 2004;Raun and Johnson 1999). Low NUE is due substantially to producers' response to the uncertainty of nitrogen (N) requirements across space and time (Babcock 1992;Tembo et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Replicability of nitrogen recommendations from ramped calibration strips in winter wheat

et al. 2010

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Ramped calibration strips have been suggested as a way for grain producers to determine nitrogen needs more accurately. The strips use incrementally increasing levels of nitrogen and enable producers to conduct an experiment in each field to determine nitrogen needs. This study determines whether predictions from the program Ramp Analyzer 1.2 are replicable in Oklahoma hard red winter wheat (Triticumaestivum). Predictions are derived from 36 individual strips from on-farm experiments-two pairs of adjacent strips at each of nine winter wheat fields in Canadian County, OK. The two pairs of strips within each field were between 120 and 155 m apart. Each strip was analyzed three times during the 2006-2007 growing season. Nitrogen recommendations from Ramp Analyzer 1.2 are not correlated even for strips that were placed side by side, and recommendations from strips in the same field show no more homogeneity than randomly selected strips throughout the county. The results indicate that ramped calibration strips are unlikely to produce accurate nitrogen requirement predictions at any spatial scale, whether at the county level or for subsections of a single field. In contrast, a procedure that uses only measures from the plot with no nitrogen and the plot with the highest level of nitrogen applied does show replicability. Thus, improvements in the ramped calibration strip technology are needed if it is to become viable.

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Improving Nitrogen Use Efficiency for Cereal Production

Cited by 1,541 publications

References 72 publications

Identification and Functional Characterization an Ortholog of OsENOD93-1 Gene in Wheat Using in-silico Approach

Identification and Functional Characterization an Ortholog of OsENOD93-1 Gene in Wheat Using in-silico Approach

Extended statistical entropy analysis for the evaluation of nitrogen budgets in Austria

Replicability of nitrogen recommendations from ramped calibration strips in winter wheat

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