Special Issue "Nitrogen Fertilization in Crop Production"

A special issue of Agriculture (ISSN 2077-0472). This special issue belongs to the section "Crop Production".

Deadline for manuscript submissions: 31 December 2020.

Special Issue Editor

Dr. Andreas S. Pacholski
Website
Guest Editor
Thuenen Institute for Climate Smart Agriculture, Bundesallee 65, 38116 Braunschweig, Germany
Interests: ammonia emission; agronomy; nitrogen use efficiency; fertilizers; agricultural sustainability

Special Issue Information

Dear Colleagues,

The supply and availability of nitrogen, the major crop nutrient, are decisive for crop productivity. Productivity effects of nitrogen are site-, weather- and nitrogen form-specific. Synthetic and organic N fertilizers vary with respect to their effects on crop growth, crop quality and nitrogen losses. Globally, nitrogen losses from agricultural systems are amongst the major pressures on managed and natural ecosystems. Sustainable nitrogen management and improving nitrogen use efficiency are key in solving the global ecological crisis while maintaining sufficient food supply.

This Special Issue of Agriculture is dedicated to the effects of fertilization of different nitrogen forms and fertilizers on crop productivity in interaction with other crop nutrients, water supply, crop type and site conditions. Crop production effects should be embedded in a comprehensive framework covering loss processes to the environment (ammonia, N2O, nitrate) and crop rotation effects with potential involvement of a perspective on biodiversity.

Authors are invited to submit papers covering various aspects of the scope of this Special Issue while avoiding a mere N response perspective of nitrogen supply on crop production. The focus is on increasing the understanding of the interaction of nitrogen fertilization with loss processes, site effects and crop physiology. Contributions with a wider perspective on food security and land use are also encouraged.

Dr. Andreas S. Pacholski
Guest Editor

Manuscript Submission Information

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Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Agriculture is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • nitrogen use efficiency
  • crop productivity
  • nitrogen losses
  • ammonia volatilization
  • denitrification
  • nitrogen forms
  • greenhouse gas emissions
  • nitrate leaching
  • nitrogen nutrient interactions
  • nitrogen water interactions
  • biodiversity

Published Papers (1 paper)

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Research

Open AccessArticle
Does the Organ-Based N Dilution Curve Improve the Predictions of N Status in Winter Wheat?
Agriculture 2020, 10(11), 500; https://doi.org/10.3390/agriculture10110500 - 26 Oct 2020
Abstract
Accurately summarizing Nitrogen (N) content as a prelude to optimal N fertilizer application is complicated during the vegetative growth period of all the crop species studied. The critical nitrogen (N) concentration (Nc) dilution curve is a stable diagnostic indicator, which performs plant critical [...] Read more.
Accurately summarizing Nitrogen (N) content as a prelude to optimal N fertilizer application is complicated during the vegetative growth period of all the crop species studied. The critical nitrogen (N) concentration (Nc) dilution curve is a stable diagnostic indicator, which performs plant critical N concentration trends as crop grows. This study developed efficient technologies for different organ-based (plant dry matters (PDM), leaf DM (LDM), stem DM (SDM), and leaf area index (LAI)) estimation of Nc curves to enrich the practical applications of precision N management strategies. Four winter wheat cultivars were planted with 10 different N treatments in Jiangsu province of eastern China. Results showed the SDM-based curve had a better performance than the PDM-based curve in N nutrition index (NNI) estimation, accumulated N deficit (AND) calculation, and N requirement (NR) determination. The regression coefficients ‘a’ and ‘b’ varied among the four critical N dilution models: Nc = 3.61 × LDM–0.19, R2 = 0.77; Nc = 2.50 × SDM–0.44, R2 = 0.89; Nc = 4.16 × PDM–0.41, R2 = 0.87; and Nc = 3.82 × LAI–0.36, R2 = 0.81. In later growth periods, the SDM-based curve was found to be a feasible indicator for calculating NNI, AND, and NR, relative to curves based on the other indicators. Meanwhile, the lower LAI-based curve coefficient variation values stated that leaf-related indicators were also a good choice for developing the N curve with high efficiency as compared to other biomass-based approaches. The SDM-based curve was the more reliable predictor of relative yield because of its low relative root mean square error in most of the growth stages. The curves developed in this study will provide diverse choices of indicators for establishing an integrated procedure of diagnosing wheat N status, and improving the accuracy and efficiency of wheat N fertilizer management. Full article
(This article belongs to the Special Issue Nitrogen Fertilization in Crop Production)
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