scholarly journals Impact of intercropping on the coupling between soil microbial community structure, activity, and nutrient-use efficiencies

PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e6412 ◽  
Author(s):  
Tengxiang Lian ◽  
Yinghui Mu ◽  
Jian Jin ◽  
Qibin Ma ◽  
Yanbo Cheng ◽  
...  
Keyword(s):  
Microbial Community ◽  
Organic Carbon ◽  
Soil Respiration ◽  
Microbial Diversity ◽  
Soil Microbial Community ◽  
Community Diversity ◽  
Microbial Community Diversity ◽  
Soil Microbial ◽  
Nutrient Use ◽  
Use Efficiency

Sugarcane-soybean intercropping has been widely used to control disease and improve nutrition in the field. However, the response of the soil microbial community diversity and structure to intercropping is not well understood. Since microbial diversity corresponds to soil quality and plant health, a pot experiment was conducted with sugarcane intercropped with soybean. Rhizosphere soil was collected 40 days after sowing, and MiSeq sequencing was utilized to analyze the soil microbial community diversity and composition. Soil columns were used to assess the influence of intercropping on soil microbial activity (soil respiration and carbon-use efficiency: nitrogen-use efficiency ratio). PICRUSt and FUNGuild analysis were conducted to predict microbial functional profiling. Our results showed that intercropping decreased pH by approximately 8.9% and enhanced the soil organic carbon, dissolved organic carbon, and available nitrogen (N) by 5.5%, 13.4%, and 10.0%, respectively. These changes in physicochemical properties corresponded to increased microbial diversity and shifts in soil microbial communities. Microbial community correlated significantly (p < 0.05) with soil respiration rates and nutrient use efficiency. Furthermore, intercropping influenced microbial functions, such as carbon fixation pathways in prokaryotes, citrate cycle (TCA cycle) of bacteria and wood saprotrophs of fungi. These overrepresented functions might accelerate nutrient conversion and control phytopathogens in soil.

scholarly journals Effects of modifiers on soil enzyme activity and microbial community diversity in cadmium-contaminated farmland soil

2021 ◽  
Author(s):  
Yongqi Zhu ◽  
Tian Tian ◽  
Jingang Wang ◽  
Jianghui Song ◽  
Xiaoyan Shi ◽  
...  
Keyword(s):  
Alkaline Phosphatase ◽  
Enzyme Activity ◽  
Microbial Community ◽  
Microbial Diversity ◽  
Soil Ph ◽  
Alkaline Phosphatase Activity ◽  
Soil Microbial Community ◽  
Community Diversity ◽  
Microbial Community Diversity ◽  
Soil Microbial

Abstract Cadmium (Cd) contamination, with great toxicity, seriously threatens soil environment. In this study, the effects of biochar and biofertilizer used as modifiers on the biochemical properties, enzyme activity, and microbial diversity in Cd-contaminated soils (1, 2, and 4 mg·kg− 1) were investigated. The results showed that the soil C/N ratio and electrical conductance could be increased by biochar and biofertilizer (P < 0.05). The soil pH in the biochar and biofertilizer treatments increased by 0.99 and 0.95, respectively, and the soil available Cd concentration decreased by 60.24% and 74.34% (P < 0.05), respectively, compared with those in the control group. The increase of soil alkaline phosphatase activity was observed in the biochar treatment (P < 0.05), and the increases of the activities of soil invertase, alkaline phosphatase, catalase, and urease were observed in the biofertilizer treatment (P < 0.05). The relative abundances of Acidobacteria, Gemmatimonadetes, and Proteobacteria were increased and the soil microbial community structure was improved in the biochar and biofertilizer treatments. Redundancy analysis (RDA) and structural equation model (SEM) showed that soil available Cd concentration had negative effects on soil pH, C/N ratio, urease and alkaline phosphatase activity, and relative abundances of Acidobacteria and Proteobacteria. The increase of soil urease activity was the main reason for the increase of soil microbial diversity. In summary, the applications of biochar and biofertilizer could decrease soil available Cd concentration, increase soil microbial community diversity, and reduce the damage of Cd stress.

scholarly journals Namib Desert Soil Microbial Community Diversity, Assembly, and Function Along a Natural Xeric Gradient

2017 ◽  
Vol 75 (1) ◽  
pp. 193-203 ◽  
Author(s):  
Vincent Scola ◽  
Jean-Baptiste Ramond ◽  
Aline Frossard ◽  
Olivier Zablocki ◽  
Evelien M. Adriaenssens ◽  
...  
Keyword(s):  
Microbial Community ◽  
Soil Microbial Community ◽  
Desert Soil ◽  
Community Diversity ◽  
Namib Desert ◽  
Microbial Community Diversity ◽  
Soil Microbial ◽  
And Function

scholarly journals The Responses of Soil Microbial to Changed Rainfall and Increased Temperature in Desert Grassland in Northern China

2021 ◽  
Author(s):  
Yi Zhang ◽  
Ying-Zhong Xie ◽  
Hong-Bin Ma ◽  
Juan Zhang ◽  
Le Jing ◽  
...  
Keyword(s):  
Microbial Community ◽  
Soil Respiration ◽  
Microbial Diversity ◽  
Microbial Communities ◽  
Soil Microbial Community ◽  
Soil Microbial Communities ◽  
Response Strategy ◽  
Desert Grassland ◽  
Soil Microbial Diversity ◽  
Soil Microbial

Abstract Background: The study evaluates how rainfall change and temperature increase affect microbial communities in the desert grassland of Ningxia Autonomous Region, China to explore the soil microbial community and the relationships among the soil microbial community, chemical properties, soil respiration (SR) and plant biomass under the climate change. We established the field experiment with five levels of rainfall by rainout shelters and two levels of temperature by Open-Top Chamber (OTC). Results: The effect of temperature to soil microbial communities is not significant, but with the continuous increase of rainfall, the microbial community gradually increases. Soil microbial diversity negatively correlated with soil CO2 flux. The α-diversity of microbial communities positively correlated with above-living biomass (ALB) and soil temperature (ST), but negatively correlated with root biomass (RB). Conclusions: Both rainfall and temperature’s rising do not promote the soil community α-diversity, but it can promote soil microbial community β-diversity. Soil microbial communities show resistance to rainfall changing. Soil respiration (SR) will limit soil microbial diversity. Soil organic carbon (SOC), soil total nitrogen (STN), and soil total phosphorus (STP) will promote soil microbial abundance and diversity. ALB and ST will promote the soil α-diversity, but the effect of RB to soil microbial is opposite. These findings maybe provide a reliable theoretical basis for formulating a reasonable response strategy in desert steppe ecosystems.

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