Relationship between soil chemical properties and microbial metabolic patterns in intensive greenhouse tomato production systems
Relationship between soil chemical properties and microbial metabolic patterns in intensive greenhouse tomato production systems
复制标题
集约化温室番茄生产系统中土壤化学性质与微生物代谢模式的关系
DOI：
10.1080/03650340.2019.1666369
复制
发表时间：
2019-09-18
影响因子：
2.4
通讯作者：
Li, Xiaolin
中科院分区：
文献类型：
--
作者：
Hao, Zhipeng;Chen, Baodong;Li, Xiaolin
摘要温室集约化生产涉及过量的化肥和有机肥施用量，可能会影响土壤的化学和生物质量。为了评价土壤肥力状况，确定对微生物功能多样性影响最大的土壤化学因子，对中国北部50个番茄商品化大棚的土壤样品进行了采集。土壤全氮含量表现出较高的土壤肥力，比1000 mg kg−-1高68%，比1500 mg kg−-1高14%。不同的土壤pH值导致土壤微生物代谢活性和多样性指数发生显著变化。土壤微生物功能多样性在近中性pH值时最高。当单个数据点与土壤有机质(SOM)作图时，土壤微生物量氮和AWCD之间存在显著的正相关。典型对应分析证实，土壤微生物功能多样性的变化与土壤pH、总氮和土壤有机质的变化有关。这项研究表明，过量施肥改变了土壤微生物群落水平的生理特征，这种影响可能是集约化温室管理下土壤pH变化的结果。
ABSTRACT Intensive greenhouse production involving excessive fertilizer and organic manure application rates may affect soil chemical and biological quality. Soil samples from 50 commercial greenhouses for tomato production in northern China were collected for the evaluation of the status of soil fertility and identification of the soil chemical factor that exerts the strongest influence on microbial functional diversity. The soil total nitrogen content showed high soil fertility and was 68% higher than 1000 mg kg−1 and 14% higher than 1500 mg kg−1. Differential soil pH values caused statistically significant shifts in microbial metabolic activity (average well color development, AWCD) and Shannon’s diversity index using BiologTM ECO plates assay. The highest soil microbial functional diversity was observed at near neutral pH values. When individual data points were plotted against soil organic matter (SOM), significant positive associations with soil microbial biomass nitrogen and AWCD were observed. The canonical correspondence analysis confirmed that shifts in the soil microbial functional diversity were associated with changes in pH, total nitrogen, and SOM. This study indicated that excessive fertilization changed the community-level physiological profile of the soil microorganisms, and this effect can be a consequence of changes in soil pH under intensive greenhouse management.