Microbial diversity in solar greenhouse soils in Round-Bohai Bay-Region, China: The influence of cultivation year and environmental condition

Abstract

Round-Bohai Bay (RBB)-Region is an important crop production area in China, where vegetables are mainly produced in solar greenhouses. However, excessive fertilization and monoculture have caused serious deterioration of soil quality in this region. Soil microbial communities play pivotal roles in many ecosystem processes and are recognized as integrative components of soil quality. Therefore, in this study, we investigated bacterial and fungal diversity in solar greenhouse soils covering a wide range of cultivation year (CY) and sampling site (SS), by using pyrosequencing technology. Surprisingly, CY and SS had little influence on bacterial and fungal relative abundance and diversity. However, environmental factors (EF) and soil available potassium (K) in particular made a significant contribution to the variation of soil bacterial and fungal communities. Specifically, K showed significant (P < 0.05) correlations with dominant bacterial phyla Bacteroidetes, Acidobacteria, Chloroflexi, and Planctomycetes and fungal phyla Ascomycota and Basidiomycota. These results suggested that soil EF appeared more important than CY and SS in shaping the compositions of bacterial and fungal communities. In addition, since fertilizer K has been in the long-term abused in RBB-Region, future vegetable production should pay more attention to K input to reduce the negative effect on soil microbial communities.

Long-Term Plastic Greenhouse Cultivation Changes Soil Microbial Community Structures: A Case Study

“…32 However, the increased available nutrients in soils under PGVC did not result in a high diversity of microbial communities, which was confirmed both by this study and another investigation. 17 A similar study reported that the available nutrient content decreased with higher microbial biomass and diversity. 10 This result might be due to the degradation of soil microbial communities after long-term PGVC in that sufficient available nutrients in the soil did not facilitate the richness and diversity of microbial communities.…”

“…Although a study reported that the soil pH increased in a solar greenhouse vegetable production system, 20 many more studies have reported decreased soil pH under PGVC. 1,17 The soil pH values normally increase with the addition of organic fertilizer and decrease with N fertilizer addition. 21 Although the total N in each soil did not show significant differences, the available N was significantly enriched in soil under 15−20 years of PGVC in this study and in a similar other study.…”

“…10 The main factors affecting the microbial communities have also been reported differently. Tian et al (2017) reported that soilavailable potassium made a significant contribution to the variation of soil bacterial and fungal communities. 17 However, another study reported that microbial community structure was significantly correlated with soil field water capacity and water-soluble organic carbon under PGVC.…”

“…Tian et al (2017) reported that soilavailable potassium made a significant contribution to the variation of soil bacterial and fungal communities. 17 However, another study reported that microbial community structure was significantly correlated with soil field water capacity and water-soluble organic carbon under PGVC. 10 Based on the reported studies, there is still an incomplete understanding of the changes in soil microbial community structures under PGVC.…”

Effects of Nitrogen Fertilizer Ratio on Microbial Diversity of Rice Rhizosphere Soil in Cold Region

“…Rice rhizosphere microorganisms are the most active part of the soil and the main component of the soil decomposition system. They play an important role in promoting soil material conversion, energy flow and biogeochemical cycle (1). In recent years, due to the predatory exploitation of natural resources, biodiversity has been seriously damaged, and ecosystems are gradually fluctuating (2,3).…”