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石灰化有助于碳和在双作物大米系统中的出
Jun Tang1, Shan Huang2, Lei Liu2
1Ji'an College, Ji'an, 343000, China.
Scientific reports
|August 2, 2025
概括
将石灰应用到酸性大米田上可以提高谷物产量,但会增加溶解碳和的出. 需要进一步管理以减轻这些损失并保护水质.
科学领域:
- 农业科学 农业科学
- 土壤科学 土壤科学
- 环境科学 环境科学
背景情况:
- 应用石灰是一种常见的做法,可以提高水产量并抵消土壤酸化.
- 石灰在田中对碳 (C) 和 (N) 排泄的影响尚未完全理解.
研究的目的:
- 研究石灰应用对大米产量的影响以及溶解有机碳 (DOC),溶解有机 (DON), (NH4+-N) 和酸 (NO3--N) 的浸出.
主要方法:
- 实地实验采用两种处理方法:没有石灰 (对照) 和石灰 (2.0 t ha-1 Ca(OH) 2).
- 在一个双耕田里进行,带有酸性红色土壤.
- 收集并分析了C和N组件的浸液.
主要成果:
- 制大大提高了大米谷物产量,分别在早期和晚期的季节增加了12.7%和12.3%.
- 石灰化增加了季初的酸 (NO3−-N) 和溶解有机 (DON) 的泄漏损失,以及季末的NO3−-N.
- 在大米初季的大部分阶段,石灰显著增加了溶解有机碳 (DOC) 浸出,但在季末没有.
结论:
- 虽然石灰化提高了水产量并减轻了土壤酸化,但它增加了在双作物水系统中溶解的C和N浸出的风险.
- 建议在使用石灰时实施补充实践,以减少C和N的浸,并保护地下水质量.
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