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具有最佳肥的长期保护农业改善了土壤的可用性
Nusrat Jahan Mumu1,2, Sunjana Akter2, Afsana Mimi Eiti Mony2
1Department of Soil Science, Khulna Agricultural University, Khulna, Bangladesh.
PloS one
|September 24, 2025
概括
保护农业 (CA) 带地耕作和较高残留量 (ST-HR) 改善了土壤 (P) 的可用性. 然而,高 (N) 率降低了不稳定的P,表明需要平衡的N应用,以实现可持续的土壤肥力.
科学领域:
- 土壤科学 土壤科学
- 农业学是一种农业学.
- 营养素管理 营养素管理
背景情况:
- 可持续的营养管理需要了解保护农业 (CA) 下的土壤 (P) 动态.
- 在联合CA实践和 (N) 施肥下对P池的长期数据有限.
- 这项研究研究了CA和N对长期作物交替中的土壤P分量的相互作用作用.
研究的目的:
- 评估CA (耕作和残留物管理) 和不同N率对不稳定性,中度不稳定性和非不稳定性P分量的长期影响.
- 为平衡的P动态确定最佳的CA和N管理策略.
- 评估CA组件和N施肥对土壤P池的协同效应.
主要方法:
- 在36个作物周期中使用分割分割地图设计的实地实验.
- 研究了两种耕作系统:传统耕作 (CT) 和条形耕作 (ST).
- 评估了两个残留量:较低的残留量 (LR) 和较高的残留量 (HR).
- 与推剂量相比,应用了六个 (N) 率 (N0到N140).
- 分析了各种土壤P分量 (可变性,中度可变性,非可变性无机和有机P).
主要成果:
- 条形耕地 (ST) 和较高残留量 (HR) 显著提高了可溶性P的可用性 (例如,可溶性P,NaHCO3-Po).
- 较高的N含量 (>N100) 可将可变无机P (可变-Pi) 降低高达45%,表明植物可能存在P缺乏.
- 在HR下,NaHCO3-Pi分数较高,N率较低 (≤N100),而在ST-HR下,中度不稳定性P随着N率较高而增加.
- 在ST下,酸-P增加,具有复杂的相互作用;在ST-HR中,它更高,N率更低 (≤N100).
- 在大多数P池中,耕作,残留物和N之间的相互作用是显著的.
结论:
- 带式耕地与较高残留量 (ST-HR) 结合,优化了P的可用性,并最大限度地减少了非性P的积累.
- 在CA下的最佳N率 (约N100) 对于平衡P分数和提高土壤肥力至关重要.
- 这些发现突出了CA组件和N管理对可持续作物生产和土壤健康的协同效应.
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