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解读作物-土壤-酶C:N:P石化测量联系:对肥料诱导的土壤转化和释放风险变化进行了为期5年的研究
Yunfei Yu1, Hao Chen1, Guanglei Chen2
1State Key Laboratory of Soil and Sustainable Agriculture, Changshu National Agro-Ecosystem Observation and Research Station, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of the Chinese Academy of Sciences, Beijing 10049, China.
The Science of the total environment
|May 20, 2024
概括
在田土壤中用猪取代化学可以增加土壤碳和有机,增强微生物活动并减少释放到环境中的风险.
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:
- 碳:: (C:N:P) 石化对农业生态系统中 (P) 转化至关重要.
- 平衡的C:N:P静态度对田土壤P转化和环境释放风险的具体影响尚不清楚.
研究的目的:
- 为了研究肥料替代如何影响C:N:P在米土壤中的石化量.
- 为了确定改变的固体测量对土壤P转化的调节作用.
- 评估P在肥替代过程中释放的环境风险.
主要方法:
- 一项为期5年的实地研究,比较化学P肥料与猪肥替代 (CFM).
- 分析土壤C:N:P固态度,微生物多样性和P分数 (有机P,Al-P).
- 集成先进技术:高分辨率透析 (HR-Peeper),薄膜扩散梯度 (DGT),土壤中DGT诱导的流量 (DIFS) 和沉积物P释放风险指数 (SPRRI) 模型.
主要成果:
- 猪替代 (CFM) 增加了土壤总碳和土壤C:P比率,但没有改变土壤总P.
- CFM促进了微生物多样性和有机P的积累,特定的细菌群 (蛋白质细菌,活性细菌) 显示了改变的P代谢.
- CFM增加了土壤Al-P,减少了土壤固体中的P扩散和补给,从而降低了P释放到环境中的风险.
结论:
- 肥料替代可以有益地改变土壤C:N:P固态度,促进土中的有机P积累和微生物活动.
- 这项研究表明,作物-土壤-酶静态度,微生物群落和P生物地化学循环之间存在联系.
- 肥料替代有效地减少了从土释放的环境风险.
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