Changes of soil-rhizosphere microbiota after organic amendment application in a Hordeum vulgare L. short-term greenhouse experiment

Abstract

Aims In order to counteract the enduring decreases in the quality of agricultural land, mechanistic studies for a more sustainable agricultural crop production were performed. They aimed to assess the effects of organic amendments in combination with mineral fertilizer on soil-rhizosphere microbiota and their influence on soil health and plant performance. Methods In a short-term greenhouse experiment, the effects of pelletized spent mushroom substrate, with different combinations of biochar and mineral fertilizer, on agricultural soil and performance of Hordeum vulgare L were scrutinized. To evaluate improved soil quality, different soil biological and chemical properties, microbial activity, bacterial diversity and plant performance were assessed. Results Plant performance increased across all fertilizer combinations. Bacterial β-diversity changed from the initial to the final sampling, pointing at a strong influence of plant development on the rhizosphere with increasing abundances of Acidobacteria and decreasing abundances of Actinobacteria, Chloroflexi, and Bacteroidetes. Microbial activity (FDA), potential enzyme activity and metabolic diversity of the microbial community (BIOLOG) were not affected by the amendments, whereas bacterial community structure changed on family level, indicating functional redundancy. Treatments containing biochar and the highest amount of mineral fertilizer (B_MF140) caused the strongest changes, which were most pronounced for the families Xanthobacteraceae, Mycobacteriaceae, and Haliangiaceae. Conclusion Applying organic amendments improved plant performance and maintained soil health, contributing to more sustainable crop production. Nevertheless, long-term field studies are recommended to verify the findings of this short-term experiment.

Peanut Rotation and Flooding Induce Rhizobacteriome Variation With Opposing Influences on the Growth and Medicinal Yield of Corydalis yanhusuo

“…According to the indicator value, both Pyrinomonadaceae and Rhodanobacteraceae were significantly abundant in HR soil (Supplementary Figure 6). In a recent study, Pyrinomonadaceae exerted a strong positive influence upon plant development (Obermeier et al, 2020). Thus, we speculate the enrichment of some beneficial bacterial taxa is what fostered better plant growth in the HR field.…”

Effects of Soil Tillage, Management Practices, and Mulching Film Application on Soil Health and Peanut Yield in a Continuous Cropping System

“…Similarly, Zhou et al (2016) reported that the Xanthobacteraceae family was a microbial group found in abundance during the late stage of wheat straw decomposition. The Xanthobacteraceae family exhibited an associative relationship to microbial N ( Obermeier et al, 2020 ). Further, a previous study has reported that Xanthobacteraceae can fix N ( Lee et al, 2005 ), which could explain the relatively high AN concentration under GMNM and the GMMF treatments in the two soil layers.…”

“…Similarly, Zhou et al (2016) reported that the Xanthobacteraceae family was a microbial group found in abundance during the late stage of wheat straw decomposition. The Xanthobacteraceae family exhibited an associative relationship to microbial N (Obermeier et al, 2020).…”

Engineering Host Microbiome for Crop Improvement and Sustainable Agriculture

“…Frequent addition of organic substrates like biochar, alfalfa hay, and glucose offers a reliable and effective approach for the sustainable management of soil fertility. Similarly, Obermeier et al (2020) also studied the effects of pelletized spent mushroom substrate (organic substrate) in combination with mineral fertilizer on agricultural soil health and performance of Hordeum vulgare L. Their results highlighted the effect of organic additions in enhancing plant performance and soil bacterial diversity. Bonanomi et al (2020) focused on the conducive effects of organic manipulation strategies in inducing plant growth and suppression of plant pathogens.…”