模拟根系分泌物中典型小分子有机化合物化学多样性对水稻土净氮矿化的影响

doi:10.14088/j.cnki.issn0439-8114.2026.01.008

湖北农业科学 ›› 2026, Vol. 65 ›› Issue (1): 42-47.doi: 10.14088/j.cnki.issn0439-8114.2026.01.008

模拟根系分泌物中典型小分子有机化合物化学多样性对水稻土净氮矿化的影响

杨烨¹, 于艳丽¹, 黄斯韵²

1.上海杉达学院食品营养与安全系,上海 201209;
2.华中农业大学资源与环境学院,武汉 430070

收稿日期:2025-08-08 出版日期:2026-01-25 发布日期:2026-02-10
通讯作者: 于艳丽（1982-）,女,副教授,硕士,主要从事食品与环境学研究,（电子信箱）yly@sandau.edu.cn。
作者简介:杨烨（1989-）,女,湖北襄阳人,讲师,博士,主要从事环境微生物学研究,（电子信箱）yyang@sandau.edu.cn。
基金资助:
上海杉达学院校科研基金重点项目（2024ZD02）

Effect of chemical diversity of typical small molecule organic compounds in simulated root exudates on net nitrogen mineralization in paddy soil

YANG Ye¹, YU Yan-li¹, HUANG Si-yun²

1. Department of Food Nutrition and Safety, Sanda University, Shanghai 201209, China;
2.College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China

Received:2025-08-08 Published:2026-01-25 Online:2026-02-10

摘要/Abstract

摘要： 为了探究小分子有机化合物多样性和组成对土壤净氮矿化的影响,利用水稻根系分泌物中的9种主要小分子有机化合物构建了52种模拟根系分泌物组合,并将其添加至水稻土中。通过15 d的培养试验,发现有机化合物的多样性和组成均会显著影响土壤净氮矿化速率。在最优最简线性模型中,甘氨酸、醋酸及化合物多样性对净氮矿化影响的重要性位居前3位。单碳源组分在模拟分泌物中对净氮矿化的影响结果显示,醋酸、苹果酸和丙酮酸均显著抑制净氮矿化,而甘氨酸、天冬氨酸、丝氨酸和丙氨酸则均显著促进净氮矿化。这表明植物可以通过分泌小分子有机化合物调控土壤氮循环过程。

关键词: 根系分泌物, 小分子有机化合物, 化学多样性, 水稻土, 净氮矿化

Abstract: In order to explore the effects of the diversity and composition of small molecule organic compounds on soil net nitrogen mineralization, 52 simulated root exudate combinations were constructed using 9 main small molecule organic compounds in rice root exudates and added to paddy soil. Through a 15-day incubation experiment, it was found that the diversity and composition of organic compounds significantly affected the soil net nitrogen mineralization rate. In the optimal simplest linear model, the importance of glycine, acetic acid and compound diversity on net nitrogen mineralization ranked the top three. The effects of single carbon source components on net nitrogen mineralization in simulated secretions showed that acetic acid, malic acid, and pyruvate significantly inhibited net nitrogen mineralization, while glycine, aspartic acid, serine and alanine significantly promoted net nitrogen mineralization. This suggested that plants could regulate soil nitrogen cycling by secreting small molecular organic compounds.

Key words: root exudates, small molecule organic compound, chemical diversity, paddy soil, net nitrogen mineralization

中图分类号:

S154.2

杨烨, 于艳丽, 黄斯韵. 模拟根系分泌物中典型小分子有机化合物化学多样性对水稻土净氮矿化的影响[J]. 湖北农业科学, 2026, 65(1): 42-47.

YANG Ye, YU Yan-li, HUANG Si-yun. Effect of chemical diversity of typical small molecule organic compounds in simulated root exudates on net nitrogen mineralization in paddy soil[J]. HUBEI AGRICULTURAL SCIENCES, 2026, 65(1): 42-47.

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模拟根系分泌物中典型小分子有机化合物化学多样性对水稻土净氮矿化的影响

Effect of chemical diversity of typical small molecule organic compounds in simulated root exudates on net nitrogen mineralization in paddy soil

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