选用于灌葡萄园的覆盖作物:关于物种气吸收和碳封存潜力的温室研究
Mehdi Sharifi1, Khaled Salimi2, Daniel Rosa3
1Summerland Research and Development Centre, Agriculture and Agri-Food Canada, Summerland, BC V0H 1Z0, Canada.
Plants (Basel, Switzerland)
|July 27, 2024
概括
豆类是葡萄园碳和捕获的优越覆盖作物,比草具有更高的生物质和营养含量. 然而,在生物固定完成之前,它们可能会耗尽土壤.
科学领域:
- 农业科学 农业科学
- 土壤科学 土壤科学
- 农业学是一种农业学.
背景情况:
- 覆盖作物对于提高土壤健康和葡萄园可持续性至关重要.
- 了解植物物种对碳 (C) 和 (N) 封存的潜力,对于优化农业实践至关重要.
研究的目的:
- 评估23种植物 (豆类,草,草) 作为覆盖作物,用于葡萄园中的C封存和土壤N增强.
- 评估各种覆盖作物物种的C和N输入潜力和营养动态.
主要方法:
- 一个120天的评估23种植物物种作为覆盖作物.
- 将覆盖作物生物质纳入土壤,然后种植葡萄树苗.
- 测量树枝干重 (SDW),干重总量 (TDW),C和N总含量,根干重 (RDW) 和营养度.
主要成果:
- 与草相比,豆类覆盖作物显示SDW,TDW,总C和总N含量显著更高.
- 拉迪诺白三叶草,荷兰白三叶草和三叶草混合物在生物质生产和营养积累方面表现出色.
- 豆类表现出较高的根N度和较低的根C/N比率,表明更快的周转率和生物N固定的潜力.
结论:
- 豆类覆盖作物在葡萄园建立期间对C和N同化更有效.
- 新的随时可用的N (RAN) 依赖指数 (RANRI) 区分了豆类和草之间的N种收购策略.
- 建议在覆盖作物实现其全部生物N固定能力之前,对潜在的土壤矿物N枯竭保持谨慎.
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