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Related Concept Videos

Inorganic Nitrogen Assimilation01:22

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Nitrogen is an essential element in biological systems, forming a crucial component of proteins, nucleic acids, and other cellular constituents. Many bacteria and archaea acquire nitrogen in the form of nitrate (NO₃⁻) or ammonia (NH₃), which are then assimilated into biomolecules through specific enzymatic pathways.Assimilatory Nitrate ReductionWhen nitrate enters the cell, it undergoes a two-step reduction process known as assimilatory nitrate reduction. Initially, the enzyme...
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Like all living organisms, plants require organic and inorganic nutrients to survive, reproduce, grow and maintain homeostasis. To identify nutrients that are essential for plant functioning, researchers have leveraged a technique called hydroponics. In hydroponic culture systems, plants are grown—without soil—in water-based solutions containing nutrients. At least 17 nutrients have been identified as essential elements required by plants. Plants acquire these elements from the...
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Updated: Dec 28, 2025

Two-Dimensional Visualization and Quantification of Labile, Inorganic Plant Nutrients and Contaminants in Soil
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Evaluating soil nitrate dynamics in an intercropping dripped ecosystem using HYDRUS-2D.

Ning Chen1, Xianyue Li1, Jirí Šimůnek2

  • 1College of Water Conservancy and Civil Engineering, Inner Mongolia Agricultural University, Huhhot 010018, China.

The Science of the Total Environment
|February 23, 2020
PubMed
Summary
This summary is machine-generated.

Competition for nitrate (NO3-N) in corn-tomato intercropping is clarified. Corn experienced greater nitrate leaching than tomato, especially under high nitrogen fertilizer, indicating significant inter-species nutrient competition.

Keywords:
HYDRUS-2DIntercroppingN-fertilizer application amountSoil nitrate dynamicsSolute exchange

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Area of Science:

  • Agricultural Science
  • Agronomy
  • Soil Science

Background:

  • Intercropping systems offer potential benefits but involve complex nutrient competition dynamics.
  • Understanding nitrate (NO3-N) competition between crops like corn and tomato is crucial for optimizing fertilizer management.
  • Limited knowledge exists regarding the spatial and temporal distribution of NO3-N in corn-tomato intercropping systems.

Purpose of the Study:

  • To investigate the competition mechanisms for nitrate (NO3-N) between corn and tomato in an intercropping system.
  • To analyze the spatial distribution and horizontal exchange of soil NO3-N under varying N-fertilizer levels.
  • To quantify NO3-N leaching and crop N uptake in different regions of the intercropping system.

Main Methods:

  • Field experiment with corn and tomato intercropping under high, medium, and low N-fertilizer applications.
  • Utilized modified HYDRUS-2D code to simulate soil NO3-N concentrations (SNC) and movement.
  • Analyzed SNCs at different locations (Pc, Pb, Pt), horizontal NO3-N exchange, vertical leaching, and crop N uptake.

Main Results:

  • Simulated soil NO3-N concentrations closely matched measured data (RMSE 0.01-0.06 mg cm-3, NSE 0.75-0.98).
  • Significant differences in average SNC were observed between corn (Pc), tomato (Pt), and between-row (Pb) regions.
  • Intensive horizontal NO3-N exchange occurred, with lower exchange between corn and bare regions compared to tomato and bare regions.
  • Nitrate leaching from the corn region was substantially higher (4.1-8.8 times) than from the tomato region, particularly under high N fertilization.

Conclusions:

  • Corn and tomato exhibit distinct competition for nitrogen, with corn showing greater susceptibility to nitrate loss.
  • Nitrate movement predominantly occurs from the tomato region towards the corn region.
  • Findings provide a scientific basis for optimizing N-fertilizer strategies tailored to individual crops within intercropping systems.