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Agronomy
Special Issues
Biological Nitrogen Fixation Technology in Sustainable Agroecosystem
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Biological Nitrogen Fixation Technology in Sustainable Agroecosystem

A special issue of Agronomy (ISSN 2073-4395). This special issue belongs to the section "Soil and Plant Nutrition".

Deadline for manuscript submissions: closed (31 July 2021) | Viewed by 7412

Special Issue Editors

Prof. Marc Pansu

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Guest Editor
Institut de Recherche pour le Développement (IRD), UMR Eco&Sols, Functional Ecology and Biogeochemistry of Soils and Agro-Ecosystems, Bât. 12, 2 Place Viala, CEDEX 2, 34060 Montpellier, France
Interests: mechanistic modeling; soil chemistry; carbon cycle; nitrogen cycle; ecosystem equilibria
Dr. Hatem Ibrahim

E-Mail Website
Guest Editor
Faculty of Sciences of Bizerte, University of Carthage, 7021 Jarzouna, Tunisia
Interests: global change; environmental science; soil science; sustainability; soil ecology; ecosystem modeling; biogeochemical cycling
Dr. Mourad Latati

E-Mail Website
Guest Editor
Ecole Nationale Supérieure Agronomique, Departement Productions Végétales. Laboratoire d'Amélioration Intégrative des Productions Végétales (AIPV: C2711100). Avenue HassaneBadi, El Harrach, 16200 Algiers, Algeria
Interests: cropping system; crop resilience; legume symbiosis; crop modeling; intercropping system and phosphorus cycle

Special Issue Information

Dear Colleagues,

This Special Issue of Agronomy aims to promote biological nitrogen (N) fixation as the promising tool to improve and sustain crop yield and ecosystems functioning, conjointly with a reduction of the industrial production of inorganic N and its consequences on the Earth carbon (C) balance. Many N fixation processes can be concerned, from direct fixation by soil bacteria to symbioses between microorganisms and vegetal organs, especially of legume species. Many mechanisms can be studied from genomes of plant species and associated symbionts, as well as ecological equilibria between inorganic N, microorganisms, and plant roots. Studies on possible interaction of N fixation with other soil elements such as phosphorus (P) can be appreciated, such as those concerning N transfer from legumes to associated non-fixing plants. In any case, submissions improving the knowledge of biological mechanisms and related technologies on N fixation, such as modeling, are welcomed.

Prof. Marc Pansu
Dr. Hatem Ibrahim
Dr. Mourad Latati
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

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. Agronomy 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 2600 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 fixation
  • Nitrogen cycle
  • Carbon cycle
  • Phosphorous cycle
  • Mechanistic modelling
  • Cropping systems
  • Global change
  • Ecosystem equilibria

Published Papers (2 papers)

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Research

17 pages, 1975 KiB  
Article
Global Landscape of Organic Carbon and Total Nitrogen in the Soils of Oasis Ecosystems in Southern Tunisia
by Nadhem Brahim, Nissaf Karbout, Latifa Dhaouadi and Abdelhakim Bouajila
Agronomy 2021, 11(10), 1903; https://doi.org/10.3390/agronomy11101903 - 22 Sep 2021
Cited by 10 | Viewed by 2398
Abstract
The oasis soils of Tunisia face several climatic and soil constraints. Trying to have cultures that are profitable and beneficial in terms of soil C and N sequestration in such environments is already a challenge. To conduct this, we tested under identical conditions [...] Read more.
The oasis soils of Tunisia face several climatic and soil constraints. Trying to have cultures that are profitable and beneficial in terms of soil C and N sequestration in such environments is already a challenge. To conduct this, we tested under identical conditions four types of occupation in sub-plots adjacent to the crops; barley alone, alfalfa alone, intercropping barley/alfalfa, and a control fallow in a saline gypseous desert soil poor in organic matter. Field experimentation was carried out in the oasis of Degache, which is very representative of other Tunisian oases. The stocks of C and N of the plot were calculated from the start in September 2019 before the installation of the different crops. After 21 months, the control plot shows a decrease of −41% in its stock of C and −25% in its stock N. However, the best result is that of the barley/alfalfa intercropping with an increase of +126.46% in the C stock and +178.67% in the N stock. After almost two years of experience, the beneficial effect of the intercropping system in the oasis is clear. These results are very motivating and seem to be a solution to the rapid decline in soil organic stocks. Full article
(This article belongs to the Special Issue Biological Nitrogen Fixation Technology in Sustainable Agroecosystem)
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15 pages, 787 KiB  
Article
Understanding the Response of Wheat-Chickpea Intercropping to Nitrogen Fertilization Using Agro-Ecological Competitive Indices under Contrasting Pedoclimatic Conditions
by Omar Kherif, Mounir Seghouani, Bahia Zemmouri, Abderrahim Bouhenache, Mohamed Islam Keskes, Rebouh Yacer-Nazih, Walid Ouaret and Mourad Latati
Agronomy 2021, 11(6), 1225; https://doi.org/10.3390/agronomy11061225 - 17 Jun 2021
Cited by 22 | Viewed by 3569
Abstract
Wheat–chickpea intercrops are not well studied, despite the importance of these two species in increasing agricultural profitability and ensuring nutritional and food security. The present study aims to assess the intercropping arable system’s services under contrasting field management and climate conditions. Simultaneously, this [...] Read more.
Wheat–chickpea intercrops are not well studied, despite the importance of these two species in increasing agricultural profitability and ensuring nutritional and food security. The present study aims to assess the intercropping arable system’s services under contrasting field management and climate conditions. Simultaneously, this assessment focuses on the most agronomic and ecological indices widely used in the literature. Durum wheat (Triticum turgidum durum L.cv. VITRON) and chickpea (Cicer arietinum L.cv. FLIP 90/13 C) were cultivated, both in sole crop and intercrop during the 2018/2019 growing season. A field experiment was carried out under controlled conditions at three contrasting pedoclimatic sites and under three levels of N fertilization. Both grain and N yield of mixture crop were significantly higher (+11%) when chickpea and durum wheat were grown together under either low or moderate N application. Soil N availability as compared to the critical level increased by more than 19% from flowering to harvest stage for intercropped wheat under low N application (N-30 and N-60), while it decreased significantly for intercropped chickpea. In rich N soils and under low rainfall conditions (site 1 and 3), intercropping was generally more advantageous for yield (+14%), N yield (+23%), and land use (103 and 119.5% for grain and N yield, respectively) only with reduced N fertilization as assessed using both land equivalent ratio (LER) and land-use efficiency (LUE). Competition dominance was directly affected by changes in climatic conditions over sites; intercropped wheat was more competitive than their respective chickpea under low rainfall conditions. These findings illustrate the crucial role of competitive index assessment in intercropping to promise a robust method for crop N and yield diagnosis during fertilization decision-making. Full article
(This article belongs to the Special Issue Biological Nitrogen Fixation Technology in Sustainable Agroecosystem)
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