长期的草回收通过调解微生物生物质周转率和根功能特征,提高了Zea mays L.的吸收
Xiaoyan Tang1, Yuxin Zhou1, Runjuan Wu1
1College of Resources, Sichuan Agricultural University, Chengdu 611130, China.
Plants (Basel, Switzerland)
|September 14, 2024
概括
将草与化学肥料相结合,可以显著提高作物的吸收和产量. 这种可持续的做法提高了土壤的肥力和微生物活动,为农业中过度使用化学肥料提供了可行的替代方案.
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:
- 在中国,为了提高作物产量,大量使用化学肥料导致环境问题和生产不稳定.
- 将作物草返回土壤是减少对化学肥料的依赖和提高土壤肥沃性的有希望的策略.
研究的目的:
- 调查不同 (N) 含量和草结合对作物 (P) 吸收和土壤P可用性的影响.
- 为了评估不同肥料管理策略在长期N-肥料试验玉米-油菜轮换.
主要方法:
- 进行了一项长期实地试验,使用治疗方法:没有肥料 (CK),常规NPK,减少NPK (0.75NPK) 和草修改NPK (SNPK).
- 测量包括作物吸收P,产量,土壤P可用性,激活系数 (PAC),微生物社区分析和根特征.
主要成果:
- 与单独的NPK相比,SNPK处理显著增加了射击P吸收 (43.7-61.9%) 和作物产量 (29.3-39.6%).
- SNPK增强了树根球P的可用性,并将PAC增加了1.72倍,这是由于功能微生物和微生物生物质P的增加.
- 吸入草促进了根排泄物和酸盐动员微生物,改善了P的动员和吸收,而N受精影响了P获取的根特征.
结论:
- 将草与化学肥料 (SNPK) 结合起来是一个有效的策略,可以在玉米-油菜系统中提高作物P吸收,产量和土壤P可用性.
- 该机制涉及增加功能性微生物的丰富性,增强微生物P周转率,并通过根排泄物和微生物改善P动员.
- 这种方法为过度使用化学肥料提供了一个可持续的替代方案,促进土壤健康和稳定的作物生产.
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