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Related Concept Videos

Sulfur Assimilation01:20

Sulfur Assimilation

Sulfur is an essential element in biological systems, contributing to synthesizing key biomolecules, including amino acids such as cysteine and methionine, and cofactors such as coenzyme A and biotin. Microorganisms primarily assimilate sulfur as sulfate (SO₄²⁻) from the environment, which must undergo a series of biochemical transformations before it can be incorporated into cellular components. As sulfate is highly oxidized, it must undergo assimilatory sulfate reduction to become...
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Sulfur is a vital element in Earth's biogeochemical systems. It transitions through various inorganic states, including sulfate (SO₄²⁻), elemental sulfur (S⁰), and sulfide (S²⁻). Abiotic and biological mechanisms across oxic and anoxic environments intricately mediate these transformations. Sulfate, the most oxidized form of sulfur, is predominantly stored in rocks, marine sediments, and oceanic waters, acting as a long-term reservoir in the global sulfur cycle.In oxic environments,...
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Various sulphur fractions changes during different manure composting.

Yanyu Bao1, Lianzhu Guan, Qixing Zhou

  • 1Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China. baoyanyu77@163.com

Bioresource Technology
|June 12, 2010
PubMed
Summary

Composting manure significantly alters sulfur (S) fractions, with water-soluble and available S increasing initially. Optimal S fertilizer potential is achieved by stopping composting at 28 days.

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Area of Science:

  • Agricultural Science
  • Environmental Science
  • Soil Science

Background:

  • Sulfur (S) is a crucial nutrient for plant growth.
  • Understanding S fraction dynamics during manure composting is vital for optimizing fertilizer value.
  • Manure composition varies significantly based on animal species and diet, influencing nutrient profiles.

Purpose of the Study:

  • To investigate the transformation of various sulfur fractions during aerobic composting of six different manures.
  • To determine the impact of animal species and diets on S fraction changes.
  • To identify optimal composting durations for maximizing available S for fertilizer applications.

Main Methods:

  • Aerobic composting simulation experiments were conducted on six types of manure.
  • Analysis of total S, water-soluble S, adsorbed S, HCl-soluble S, and organic S concentrations over time.
  • Monitoring of available S concentration throughout the composting process.

Main Results:

  • Total S concentration decreased significantly during the initial 14 days of composting for all manures.
  • Water-soluble S, adsorbed S, and available S concentrations initially increased then decreased.
  • Organic S concentration showed an opposite trend to water-soluble, adsorbed, and available S.
  • HCl-soluble S concentration consistently increased during composting.
  • Composting for 28 days yielded high concentrations of water-soluble S, adsorbed S, and available S, indicating potential as an effective S fertilizer.

Conclusions:

  • Manure type significantly influences S fraction dynamics during composting.
  • Organic S and HCl-soluble S were the primary fractions affecting total S changes.
  • Available S is mainly derived from water-soluble and adsorbed S fractions.
  • Stopping composting at 28 days maximizes the potential of manure as an effective sulfur fertilizer.