Redefining crop breeding strategy for effective use of nitrogen in cropping systems

Article Environmental Sciences

From use efficiency to effective use of nitrogen: A dilemma for maize breeding improvement

Ignacio A. Ciampitti et al.

Summary: Maize breeding aims to improve nitrogen use efficiency, reduce dependency on nitrogen fertilizers, and increase yield.

SCIENCE OF THE TOTAL ENVIRONMENT (2022)

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Article Agronomy

Revisiting the critical nitrogen dilution curve for tall fescue: A quantitative synthesis

Javier A. Fernandez et al.

Summary: The study reanalyzed plant nitrogen status data of tall fescue, revised the critical nitrogen dilution curve, and suggested that increasing the number of experiments can reduce uncertainty, with a minimum of five studies needed for accurate coefficient estimation with the Bayesian method.

EUROPEAN JOURNAL OF AGRONOMY (2021)

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Article Agronomy

Does the critical N dilution curve for maize crop vary across genotype x environment x management scenarios? - a Bayesian analysis

Ignacio A. Ciampitti et al.

Summary: This study presents a global synthesis of maize data related to plant biomass and plant N concentration to fit critical N curves and test differences in curve parameters across varying GxExM combinations. Results show minor variations in curve parameters between different GxExM combinations, suggesting that changes in plant canopy architecture may impact the N dilution curve and warrant further evaluation. Refining the estimation of critical plant %N will improve the assessment of plant N status.

EUROPEAN JOURNAL OF AGRONOMY (2021)

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Article Agronomy

Random forest regression results in accurate assessment of potato nitrogen status based on multispectral data from different platforms and the critical concentration approach

Junxiang Peng et al.

Summary: This study utilized multispectral data from various platforms to estimate plant nitrogen status, with UAV data showing the highest accuracy and parametric and nonparametric regressions performing better in predicting PNU and NNI than PNC.

FIELD CROPS RESEARCH (2021)

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Article Biodiversity Conservation

Patterns and drivers of global gross nitrogen mineralization in soils

Ahmed S. Elrys et al.

Summary: Soil gross nitrogen mineralization is mainly controlled by climate and soil properties, with factors such as microbial biomass, total carbon, total nitrogen, precipitation, bulk density, and soil pH playing key roles. Total nitrogen accelerates mineralization by increasing microbial biomass, while lower bulk density and higher precipitation also stimulate the process. The study suggests that microbial population size, soil substrate availability, soil pH, precipitation changes, and land use can interact to influence nitrogen mineralization, ultimately impacting ecosystem productivity and nitrogen loss to the environment.

GLOBAL CHANGE BIOLOGY (2021)

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Article Plant Sciences

Nitrogen Use Efficiency Definitions of Today and Tomorrow

Kate A. Congreves et al.

Summary: This article discusses the impact of crop production on the nitrogen (N) cycle and the need for better nitrogen management. It introduces factors that are currently ignored in traditional NUE indices and suggests ways to improve the conceptualization of NUE.

FRONTIERS IN PLANT SCIENCE (2021)

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Article Food Science & Technology

Different quantification approaches for nitrogen use efficiency lead to divergent estimates with varying advantages

Zhi Quan et al.

Summary: Different methods are currently used to quantify nitrogen use efficiency. The comparison of three such methods based on real-world experiments shows the impact of indicator choice on results, while highlighting the importance of long-term observations.

NATURE FOOD (2021)

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Article Plant Sciences

Transient reprogramming of crop plants for agronomic performance

Stefano Torti et al.

Summary: The proposed technology targets regulatory circuits within plants transiently, allowing for customized alterations of agronomic traits. By utilizing RNA viral transfection methods, this approach is fast, versatile, and does not involve genetic modification of plant genomes. It can be used in multiple plant species for rapid fine-tuning of traits without altering the genome.

NATURE PLANTS (2021)

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Review Plant Sciences