[有机投入对土壤营养和微生物代谢在新回收的农田中的影响]
Qi-Jie Yin1, Jian-Wu Jiang1, Han-Qin Yin2
11 Zhejiang Key Laboratory of Recycling and Eco-treatment of Waste Biomass, Zhejiang University of Science and Technology, Hangzhou 310023, China.
概括
有机投入改善了新回收的农田的土壤营养和微生物活动. 基于草生物炭的肥料 (MBF) 证明了对土壤碳固定和施肥的最全面的益处.
科学领域:
- 土壤科学 土壤科学
- 微生物学 微生物学
- 农业学是一种农业学.
背景情况:
- 了解土壤微生物新陈代谢对有机投入的反应,对于新回收农田的碳固定和施肥至关重要.
- 新回收的农田经常表现出改变的土壤特性,需要有效的管理策略来提高肥沃性和碳封存.
研究的目的:
- 研究不同有机投入对土壤营养素,有机碳分数,细胞外酶活动,微生物代谢和碳利用效率的影响.
- 确定影响土壤微生物新陈代谢和酶活动的驱动因素,在新回收的农田生态系统中.
主要方法:
- 使用五种治疗方法进行实地实验:单独使用NPK (对照),使用NPK + 肥料 + 玉米草 (MS),使用NPK + 肥料 (M),使用NPK + 草生物炭基肥料 (MBF) 和使用NPK + 草生物炭 (MB).
- 分析土壤营养素,有机碳分量 (活性和反性),微生物生物质 (C,N,P) 和细胞外酶活动 (C和N循环酶).
- 包括曼特尔相关性,冗余分析,酶向量模型和部分最小平方路径建模在内的统计分析.
主要成果:
- 与单独的NPK相比,有机投入显著提高了土壤营养素,有机碳分数和微生物活动.
- 肥料 (M) 处理显示了土壤营养素和活性有机碳的最高改善,而草生物炭 (MB) 则最大限度地提高了反抗性有机碳.
- 玉米 (MS) 处理导致了最高的作物产量,并显著增加了与C和N循环相关的酶活动.
结论:
- 有机投入在促进土壤碳固定和在新回收的农田中施肥方面发挥着至关重要的作用.
- 土壤微生物的新陈代谢受到碳和的可用性限制,有机投入减轻了的限制.
- 在这些系统中,以肥料为基础的修改,特别是以草生物炭为基础的肥料 (MBF),为土壤健康和生产力提供了最全面的好处.
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