Ambrosia trifida L. is designated as an invasive exotic plants in South Korea. Despite its widespread distribution in South Korea, research on A. trifida is limited. Organic matter input by A. trifida litter decomposition is predicted to change the soil environment. In this study, we investigated the effects of A. trifida litter decomposition on soil nutrient status. We used the litterbag method to investigate the decomposition rate, decay constant (k), carbon/nitrogen (C/N) ratio, and nutrient dynamics of A. trifida litter during decomposition. The decay constants (k) of leaf, stem, and root litter after 11 months of decomposition were 1.93, 1.47, and 1.28, respectively. After 22 months of decomposition, the decay constants (k) of leaf, stem, and root litter were 1.01, 0.99 and 1.84, respectively. After 22 months, approximately 85% of organic matter, 79% of nitrogen (N), 98% of phosphorus (P), 96% of potassium (K), 96% of magnesium (Mg), and 69% of calcium (Ca) were returned to the soil. Our results provide key insights into the nutrients exchange between A. trifida and soil. Given the biological characteristics of A. trifida, the input of a large amount of organic matter to the soil and the nutrients released through the decomposition of this organic matter are expected to enhance the growth and nutrient absorption of A. trifida in invaded areas.

中文翻译：

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韩国非原生栖息地巨型豚草（Ambrosia trifida L.）的凋落物分解率和养分动态

Ambrosia trifida L. 在韩国被指定为外来入侵植物。尽管在韩国广泛分布，但对三裂曲霉菌的研究有限。A. trifida 凋落物分解输入的有机物质预计会改变土壤环境。在这项研究中，我们调查了三裂木虱凋落物分解对土壤养分状况的影响。我们使用垃圾袋法研究了三裂曲霉菌在分解过程中的分解速率、衰减常数 (k)、碳/氮 (C/N) 比和营养动态。分解 11 个月后，叶、茎和根凋落物的衰减常数 (k) 分别为 1.93、1.47 和 1.28。经过 22 个月的分解，叶、茎和根凋落物的衰变常数 (k) 分别为 1.01、0.99 和 1.84。22个月后，大约 85% 的有机质、79% 的氮 (N)、98% 的磷 (P)、96% 的钾 (K)、96% 的镁 (Mg) 和 69% 的钙 (Ca) 被返回到土壤。我们的结果为三裂曲霉菌和土壤之间的养分交换提供了关键见解。鉴于 A. trifida 的生物学特性，大量有机质进入土壤以及通过这些有机物分解释放的养分有望促进 A. trifida 在入侵地区的生长和养分吸收。