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Related Concept Videos

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Nitrogen is a very important element for life because it is a major constituent of proteins and nucleic acids. It is a macronutrient, and in nature, it is recycled from organic compounds and stored in the form of  ammonia, ammonium ions, nitrate, nitrite, or  nitrogen gas by many metabolic processes. Many of these metabolic processes are carried out only by prokaryotes.
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Related Experiment Video

Updated: May 20, 2025

Microplot Design and Plant and Soil Sample Preparation for 15Nitrogen Analysis
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Nitrogen Fertilization Shapes Soil Microbial Diversity and Ecosystem Multifunctionality by Modulating Soil Nutrients.

Yaoquan Zhang1, Zhuzhu Luo1,2, Liangliang Li3

  • 1College of Forestry, Gansu Agricultural University, Lanzhou 730070, China.

Microorganisms
|March 27, 2025
PubMed
Summary

Nitrogen fertilizer addition impacts soil microbial communities and ecosystem functions in alfalfa fields. Increased nitrogen levels enhanced soil carbon, multifunctionality, and productivity, while altering microbial interactions.

Keywords:
alfalfaecosystem multifunctionalityloess plateaunitrogen fertilizer additionsoil microorganisms

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Area of Science:

  • Soil Science
  • Ecology
  • Microbiology

Background:

  • Soil microbial communities are crucial for ecosystem functions and biogeochemical cycles.
  • Understanding nitrogen fertilizer effects on soil health is vital for sustainable agriculture.

Purpose of the Study:

  • To investigate the impact of nitrogen fertilizer on soil microbial communities and ecosystem multifunctionality in alfalfa fields.
  • To determine the relationship between nitrogen levels, microbial diversity, and ecosystem functions.

Main Methods:

  • Field experiment in a semi-arid Loess Plateau alfalfa field.
  • Ecological network analysis to study microbial community interactions.
  • Measurement of soil carbon, phosphorus, and potassium functions, ecosystem multifunctionality, and grassland productivity.

Main Results:

  • Nitrogen addition altered bacterial and fungal community interactions, showing cooperation under N100 and competition under N50.
  • N150 treatment significantly increased soil carbon function (+45.17%), ecosystem multifunctionality (+34.01%), and grassland productivity (+7.92%).
  • Soil pH, water content, and microbial diversity were identified as key factors influencing ecosystem functions and productivity.

Conclusions:

  • Nitrogen fertilizer application influences soil microbial community structure and function.
  • Changes in soil nutrient levels impact ecosystem multifunctionality by regulating microbial diversity.
  • Findings provide insights into nutrient management for optimizing soil health and ecosystem services.