长期in situ吸返回增加了土壤聚合和聚合相关的有机碳分数在一个米土壤
Jiaren Liu1, Xuehai Wang1, Hu Zhang1
1Anhui Province Key Lab of Farmland Ecological Conservation and Pollution Prevention, School of Resources and Environment, Anhui Agricultural University, Hefei, 230036, China.
Heliyon
|July 1, 2024
概括
通过施肥返回的长期草显著改善了东中国田的土壤总体稳定性和有机碳 (OC) 分数. 这些做法提高了土壤健康,提高了作物生产率,提供了可持续的农业解决方案.
科学领域:
- 土壤科学 土壤科学
- 农业学是一种农业学.
- 环境科学 环境科学
背景情况:
- 虽然草返回有利于土壤肥力,但其对聚合物大小分布和田中的有机碳 (OC) 分数的长期影响还未得到充分研究.
- 了解这些影响对于像中国东部这样的地区的可持续农业管理至关重要.
研究的目的:
- 在9年内调查草返回和化学化肥对土壤聚合物的组成和各种OC分量 (TOC,DOC,ROC,EOC) 的综合影响.
- 评估这些处理对大米土壤作物生产率的影响.
主要方法:
- 进行了为期九年的实地试验,使用了四种治疗方法:对照 (CK),常规受精 (F),草返回加常规受精 (SF) 和草返回加80%常规受精 (SDF).
- 在不同深度 (0-50厘米) 分析了土壤样本的总体尺寸分布和OC分数 (TOC,DOC,ROC,EOC).
- 记录了大菜和大米的作物产量.
主要成果:
- 草回归处理 (SF和SDF) 显著增加了2毫米以上的聚合物的比例,特别是在顶部0-30厘米的土壤层中.
- 在SF处理中,在0.25-2毫米的聚合物中,总有机碳 (TOC) 含量最高 (21.4g/kg),明显高于CK和F.
- 易氧化OC (EOC) 在SDF0.25-2毫米聚合物中最高,而耐性OC (ROC) 和溶解OC (DOC) 在SF聚合物中最高 (分别为2毫米和0.25-2毫米).
- 此外,SF处理也为菜和大米带来了最高的作物生产率.
结论:
- 长期回收草与传统 (SF) 或减少 (SDF) 化学肥料相结合,有效地促进土壤聚合物的形成和稳定性.
- 这些综合管理策略增强了各种土壤有机碳分量的积累,并大大提高了中国东部大米土壤的作物生产率.
- SF和SDF代表了Chaohu湖地区可持续农业实践的最佳方法.
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