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Novel adsorbent reduces ammonia emissions, offering alternative to deep nitrogen placement in wheat fields

Novel adsorbent reduces ammonia emissions, replacing N deep placement in wheat fields
Mechanisms of lower ammonia emissions with adsorbent application. Credit: Yang et al.

A research team in the Hefei Institutes of Âé¶¹ÒùÔºical Science of the Chinese Academy of Sciences has developed a novel ammonium adsorbent that significantly reduces ammonia emissions from wheat fields, enhancing the soil's ability to retain ammonium and thereby decreasing ammonia losses.

The research results were in Soil & Tillage Research.

Wheat plays a critical role in global food security, and is a key strategy to enhance productivity. However, nitrogen applied in wheat fields is often lost through , which not only wastes valuable nutrients but also contributes to . Ammonia emissions are closely linked to the soil's capacity to adsorb , and improving this capacity can help mitigate ammonia losses.

In their study, the researchers compared the effects of ammonium adsorbent application with deep nitrogen placement on ammonia emissions in wheat fields. The adsorbent, primarily composed of humic acid-modified montmorillonite, poses no risk of environmental contamination, making it a sustainable option for agricultural use.

The results showed that the application of the adsorbent reduced ammonia emissions by 2.0% to 42.3%. Notably, when combined with nitrogen fertilizer, shallow soil placement (0–10 cm) of the adsorbent was found to be as effective in reducing ammonia emissions as the traditional deep nitrogen placement (10–20 cm) method.

Novel adsorbent reduces ammonia emissions, replacing N deep placement in wheat fields
Relationships between ammonia emission rate and soil factors. Credit: Yang et al.

This combined approach offers a promising alternative for wheat fields that are difficult to plow, replacing deep nitrogen placement and still achieving significant reductions in ammonia emissions.

"Our findings provide new insights and practical solutions to reduce nitrogen loss and improve nitrogen use efficiency in wheat production," said Dr. Yang Yang, lead researcher of the study.

More information: Yang Yang et al, Adsorbent application and nitrogen deep placement reduced ammonia emissions in wheat fields, Soil and Tillage Research (2025).

Citation: Novel adsorbent reduces ammonia emissions, offering alternative to deep nitrogen placement in wheat fields (2025, March 5) retrieved 9 June 2025 from /news/2025-03-adsorbent-ammonia-emissions-alternative-deep.html
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