Mechanisms by Which Soil Solution Fe2+ Affects Seedling Growth of Rice Under Rice Straw Return

文献类型： 外文期刊

第一作者： Li, Jinwang

作者： Li, Jinwang;Bao, Chao;Yan, Shuangshuang;Ma, Chunmei;Yan, Chao;Gao, Shiwei;Ma, Cheng

作者机构：

关键词： plant dry weight; anaerobic soil conditions; iron plaque formation; H2O2

期刊名称：AGRONOMY-BASEL （ 影响因子：3.4； 五年影响因子：3.8 ）

ISSN：

年卷期： 2025 年 15 卷 2 期

页码：

收录情况： SCI

摘要： Rice straw return plays an important role in sustainable agricultural development, but the impact of rice straw return on rice growth remains inconclusive. In this experiment, we employed a combination of soil and water cultivation experiments to investigate the impact of rice straw return on seedling growth of rice in Northeast China. This study demonstrated that rice straw return inhibited rice plant growth within 37 days but was no longer significant after 37 days. Rice straw return resulted in an increase in iron(II) (Fe2+) concentration of soil solution. The hydroponic test demonstrated that a high concentration of Fe2+ significantly increased the uptake of Fe, reduced the H2O2 content in root, facilitated the formation of root iron plaque, and inhibited the dry weight at the rice seedling stage, in comparison to a nutrient solution with a normal Fe2+ concentration. The increased Fe2+ concentration of soil solution under rice straw return may be a significant factor in the inhibition of rice seedling growth. Moreover, in field management, this study also linked the amount of rice straw returned and soil solution Fe2+ to provide a clear quantitative guide without affecting plant growth.

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