通过冷区大米作物系统中返回的的数量来调节的分解及其对土壤功能的影响
Lin Liu1,2, Ming Cheng1, Lei Yang1
1School of Agriculture, Yanbian University, Yanji, 133002, China.
Scientific reports
|September 22, 2023
概括
将大米草返回田地可以改善土壤的健康. 在凉爽,洪水的条件下,最优的降解和土壤功能发生在2/3的草回报 (5866公斤hm-2),有利于可持续农业.
科学领域:
- 农业科学 农业科学
- 土壤微生物学 土壤微生物学
- 环境科学 环境科学
背景情况:
- 米回收改善土壤有机物质,促进可持续农业.
- 草的降解涉及化,矿化,微生物和酶.
- 关于草降解,微生物影响和在凉爽,洪水条件下的功能存在知识差距.
研究的目的:
- 在寒冷的气候下,研究大米的生物降解.
- 确定不同回收率对微生物群落和土壤酶活性的影响.
- 确定最佳的草回报量,以提高土壤的功能.
主要方法:
- 在寒冷气候的田中,实地实验使用了四种草回报率 (传统的1/3,2/3,全) .
- 在多个时间点 (20,40,71,104,137天) 监测草的生物降解.
- 对主导细菌 (Paludibacteraceae,Archaeaceae) 和细胞外酶活性进行分析.
主要成果:
- 帕鲁迪巴克特拉属和阿基亚属是干草退化的主要细菌.
- 这些细菌的相对丰度最高和细胞外酶活性峰值发生在2/3的吸管回收率 (5866公斤hm-2).
- 在2/3吸管回收率下,土壤潜在功能显著增强,特别是在104天后.
结论:
- 在寒冷地区,在常规应用下 (130 kg hm-2),米的最佳回收量为5866 kg hm-2.
- 这种速度最大限度地提高了微生物活动和细胞外酶功能,以有效降解草.
- 通过优化草管理,研究结果支持可持续的农业实践.
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