Soil C/N and pH together as a comprehensive indicator for evaluating the effects of organic substitution management in subtropical paddy fields after application of high-quality amendments

Dai, Xianglin; Zhou, Wei; Liu, Guangrong; Liang, Guozheng; He, Ping; Liu, Zengbing

doi:10.1016/j.geoderma.2018.11.023

Cited by 70 publications

(46 citation statements)

References 47 publications

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“…The total microbial biomass was measured using the total concentration of PLFAs (nmol g -1 ), and the abundance of each PLFA was determined by its % mole abundance in each sample. Individual PLFAs, including bacteria, gram-positive (G+) and gram-negative (G-) bacteria, fungi, arbuscular mycorrhizal fungi (AMF), and actinomycete, were used as signatures for the various taxonomic groups of microorganisms according to previously published fatty acid biomarker data [11, 18, 35] and are shown in Table 2.…”

Section: Methodsmentioning

confidence: 99%

“…Experimental evidence has shown that to fulfill nutrient and energy demands, soil microorganisms can secrete extracellular enzymes to break down polymerized SOM into assimilable small molecules [16]. Numerous extracellular enzyme activities are involved in N and C turnover [17, 18]. Generally, extracellular enzymes consist of cellulases, oxidases and hydrolases that break down substrates of different complexities and compositions [19].…”

Section: Introductionmentioning

confidence: 99%

“…Studies have demonstrated that N addition impacts microbial community structure by altering soil chemical properties. For instance, researchers pointed out that changes in soil pH can cause ambient shifts in microbial groups [18, 21]. Additionally, variations in soil total N (TN), soil organic carbon (SOC), and NO 3 - N levels as a result of N enrichment can also impact the soil microbial population [6, 11, 18].…”

Section: Introductionmentioning

confidence: 99%

“…For instance, researchers pointed out that changes in soil pH can cause ambient shifts in microbial groups [18, 21]. Additionally, variations in soil total N (TN), soil organic carbon (SOC), and NO 3 - N levels as a result of N enrichment can also impact the soil microbial population [6, 11, 18]. Likewise, N addition-induced changes in soil properties can impact enzyme activities [6, 18].…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, variations in soil total N (TN), soil organic carbon (SOC), and NO 3 - N levels as a result of N enrichment can also impact the soil microbial population [6, 11, 18]. Likewise, N addition-induced changes in soil properties can impact enzyme activities [6, 18]. However, various groups of enzymes may respond distinctly to soil variables.…”

Section: Introductionmentioning

confidence: 99%

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The responses of extracellular enzyme activities and microbial community composition under nitrogen addition in an upland soil

Ullah

Huang

et al. 2019

PLoS ONE

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Tremendous amounts of nitrogen (N) fertilizer have been added to arable lands, often resulting in substantial effects on terrestrial ecosystems, including soil acidification, altered enzyme activities and changes in microbial community composition. Soil microbes are the major drivers of soil carbon (C) and N cycling; therefore, understanding the response of microbial communities to elevated N inputs is of significant importance. This study was carried out to investigate the influences of different N fertilization rates (0, 182, and 225 kg ha-1 representing control, low, and high N supply for each crop season for summer maize and winter wheat) on soil biochemical attributes, extracellular enzyme activities, and the microbial community composition in a winter wheat-summer maize rotation cropping system in north-central China. The results showed that N addition significantly decreased the soil pH in both the wheat and maize seasons. Microbial biomass N (MBN) decreased following N fertilization in the wheat season, while the opposite trend in MBN was observed in the maize season. Response ratio analysis showed that the activities of enzymes involved in C, N, and phosphorus cycling were significantly enhanced under N enrichment in both the wheat and maize seasons, and higher enzyme activities were noted in the high N addition treatment than in the low N addition treatment. A linear increase in fungal abundance with the N addition gradient was observed in the wheat season, whereas the fungal abundance increased and then decreased in the maize season. The bacterial abundance showed an increased and then decreased trend in response to the N addition gradient in both the wheat and maize crop seasons. Moreover, the partial least squares path model (PLS-PM) analysis showed that soil pH and soil organic carbon (SOC) were the most important soil variables, causing shifts in the soil bacteria. Furthermore, compared with the N-cycling enzymes, the C-cycling enzymes were significantly affected by the soil pH and SOC. Taken together, these results suggest that the effect of N addition on enzyme activities was consistent in both crop seasons, while the effects on MBN and microbial community composition to N addition were highly variable in the two crop seasons. Moreover, N fertilization-induced changes in the soil chemical properties such as soil acidity and SOC played a substantial role in shaping the microbial community.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The responses of extracellular enzyme activities and microbial community composition under nitrogen addition in an upland soil

Ullah

Huang

et al. 2019

PLoS ONE

Self Cite

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Actinomycetes: Implications and Prospects in Sustainable Agriculture

Shanthi

2021

Biofertilizers

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Rhizobacterial communities, enzyme activity, and soil properties affect rice seedling's nitrogen use

Dong

Sun

et al. 2021

Agronomy Journal

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Microorganisms are crucial in mediating N cycles in soil and produce impact on the health and nutrition of the host plant. The seedling stage is one of the most critical periods of crop growth and development. However, the information regarding the underlying interactions between soil microbial community, soil nutrient, enzyme activities, and microbial biomass, and whether they associate with nitrogen use efficiency (NUE) of N at the rice (Oryza sativa L.) seedling stage are still limited. We applied 16S ribosomal RNA gene profiling to characterize root bacterial microbiota of rice varieties with different levels of NUE at the seedling stage. We find that high nitrogen use efficiency varieties (HNUEs) and low nitrogen use efficiency varieties (LNUEs) recruit distinct root microbiota. Notably, HNUEs‐enriched bacterial taxa are more diverse, and contain more operational taxonomic units (OTUs) with N metabolism functions, than LNUEs‐enriched taxa. We provide evidence that the content of available N and the microbial biomass of HNUEs' rhizospheric soil are higher than those of LNUEs. Through redundancy analysis (RDA), we found that Deltaproteobacteria, Acidobacteria, Bacteroidia, and Saccharimonadia with the potential function of the beneficial microorganism to seedling N use and growth. The links between rice seedling and soil microbiota membership combine with other essential factors established in this study could contribute to improving N use at the crop seedling stage to promote the resistance and survival rate after transplanting.

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Soil C/N and pH together as a comprehensive indicator for evaluating the effects of organic substitution management in subtropical paddy fields after application of high-quality amendments

Cited by 70 publications

References 47 publications

The responses of extracellular enzyme activities and microbial community composition under nitrogen addition in an upland soil

The responses of extracellular enzyme activities and microbial community composition under nitrogen addition in an upland soil

Actinomycetes: Implications and Prospects in Sustainable Agriculture

Rhizobacterial communities, enzyme activity, and soil properties affect rice seedling's nitrogen use

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