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Updated: Sep 9, 2025

Measuring Phosphorus Release in Laboratory Microcosms for Water Quality Assessment
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纯种和混合种森林中土壤聚合物的分数特性和影响因素

Da-Yuan Liu1,2, Dong-Yue Meng1,2, Chen-Yi Yu1,2

  • 1Co-Innovation Centre for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China.

Ying yong sheng tai xue bao = The journal of applied ecology
|August 31, 2025
PubMed
概括

与纯森林相比,混合森林通过提高土壤聚合物稳定性和酸酶活性,显著提高土壤的可用性. 这项研究是改善亚热带土壤营养循环的关键.

关键词:
细根生物质垃圾生物量土壤聚合物土壤分数支架类型

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Unlike carbon, water, and nitrogen, phosphorus is not present in the atmosphere as a gas. Instead, most phosphorus in the ecosystem exists as compounds, such as phosphate ions (PO43-), found in soil, water, sediment and rocks. Phosphorus is often a limiting nutrient (i.e., in short supply). Consequently, phosphorus is added to most agricultural fertilizers, which can cause environmental problems related to runoff in aquatic ecosystems.
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Aggregate classification is generally based on its size, petrographic characteristics, weight, and source. Size classification ranges from coarse to fine aggregates, defined by the size of the particles. Coarse aggregates are particles that do not pass through ASTM sieve No. 4, and aggregates that pass through the sieve are fine aggregates.
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Deleterious Substances in Aggregate

Deleterious substances in aggregates can be detrimental to the quality and durability of concrete. These substances include organic impurities like loam, which interfere with cement hydration and are usually present in the sand. These prevent a good bond between aggregate and cement paste. Organic impurities can be detected using the colorimetric test, where the darkness of a solution after agitation indicates the level of organic content.
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