Impact of Rhizosphere Microbes of Three Early Colonizing Annual Plants on Improving Soil Fertility During Vegetation Establishment Under Different Fallow Periods Following Shifting Cultivation

Hauchhum, Ramchhanliana; Tripathi, S. K.

doi:10.1007/s40003-019-00422-w

Cited by 9 publications

(5 citation statements)

References 23 publications

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“…Firmicutes are known to be a dominant bacterial group (Filippidou et al, 2015). The relative abundance of Firmicutes in the F soil was the highest in our study, indicating that the soil microbial environment had self-corrected, which is consistent with the findings of other studies (Guo et al, 2006;Hauchhum and Tripathi, 2019;Lintemani et al, 2020). In addition, after fallow, the numbers of harmful bacteria decreased, while those of the beneficial bacteria gradually increased, which indicated that the microbial community repaired itself after fallow.…”

Section: Discussionsupporting

confidence: 91%

“…Implementing a natural fallow alleviated the problems with these soil factors. Similar results were obtained by Hauchhum and Tripathi (Hauchhum and Tripathi, 2019). Thus, the autotoxic substances exuded from A. lancea roots accumulated in the soil and resulted in soil acidification, which in turn inhibited plant growth and initiated the continuous cropping obstacle of A. lancea.…”

Section: Discussionsupporting

confidence: 80%

“…Lintemani et al (2020) suggested a 15-year fallow after a crop cycle to restore the original soil conditions in slash-andburn agriculture. The rhizosphere bacteria and fungi of early colonizing annual plants are considered to accelerate the process of improving soil fertility and potentially boost the succession of vegetation during fallow periods (Hauchhum and Tripathi, 2019). However, our knowledge on the changes of soil microenvironment under natural fallow practices remains unclear.…”

Section: Introductionmentioning

confidence: 99%

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Insights into the impacts of autotoxic allelochemicals from rhizosphere of Atractylodes lancea on soil microenvironments

Wang

Deng²,

Duan³

et al. 2023

Front. Plant Sci.

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Atractylodes lancea suffers from continuous cropping obstacles that have become a major constraint in its cultivation, but there is still little information on the autotoxic allelochemicals and their interaction with soil microorganisms. In this study, we firstly identified the autotoxic allelochemicals from rhizosphere of A. lancea and determined their autotoxicity. Third-year continuous A. lancea cropping soils, i.e., rhizospheric soil and bulk soil, compared with control soil and one-year natural fallow soil were used to determine soil biochemical properties and microbial community. Eight allelochemicals from A. lancea roots were detected and exhibited significant autotoxicity effects on seed germination and seedling growth of A. lancea with the highest content of dibutyl phthalate in rhizospheric soil and lowest IC50 value of 2,4-di-tert-butylphenol inhibiting seed germination. The contents of soil nutrients and organic matter, pH value, and enzyme activity were altered between different soils, and the parameters of fallow soil were close to those of the unplanted soil. The PCoA analysis indicated that the community composition of both bacteria and fungi were differed significantly among the soil samples. Continuous cropping decreased OTUs numbers of bacterial and fungal communities, and natural fallow restored them. The relative abundance of Proteobacteria, Planctomycetes, and Actinobacteria decreased, and that of Acidobacteria and Ascomycota increased after three years cultivation. The LEfSe analysis identified 115 and 49 biomarkers for bacterial and fungal communities, respectively. The results suggested that natural fallow restored the structure of soil microbial community. Overall, our results revealed that autotoxic allelochemicals caused the variations of soil microenvironments and resulted in replantation problem of A. lancea, and natural fallow alleviated the soil deterioration by remodeling the rhizospheric microbial community and restoring soil biochemical properties. These findings provide important insights and clues for solving the continuous cropping problems and guiding the management of sustainable farmland.

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Section: Discussionsupporting

confidence: 91%

Section: Discussionsupporting

confidence: 80%

Section: Introductionmentioning

confidence: 99%

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Insights into the impacts of autotoxic allelochemicals from rhizosphere of Atractylodes lancea on soil microenvironments

Wang

Deng²,

Duan³

et al. 2023

Front. Plant Sci.

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“…Ageratum conyzoides affects the soil chemistry, nutrient composition, and soil microbiota, thereby altering the environment of the invaded habitat [ 91 ]. A study reported a significant reduction in soil nitrogen and phosphorus in rice fields due to weed infestation [ 78 ], whereas other reports suggested that weed residues have enriched the soil nutrient content [ 31 , 92 ], despite their negative effects on associated crop species [ 31 ]. The weed modifies the soil environment through root exudation by mobilizing or chelating nutrients and, in turn, disturbing the natural soil composition [ 36 ].…”

Section: Ecological Impactsmentioning

confidence: 99%

Ecology, Biology, Environmental Impacts, and Management of an Agro-Environmental Weed Ageratum conyzoides

Kaur

Singh

et al. 2023

Plants

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Ageratum conyzoides L. (Billy goat weed; Asteraceae) is an annual herbaceous plant of American origin with a pantropical distribution. The plant has unique biological attributes and a raft of miscellaneous chemical compounds that render it a pharmacologically important herb. Despite its high medicinal value, the constant spread of the weed is noticeable and alarming. In many countries, the weed has severely invaded the natural, urban, and agroecosystems, thus presenting management challenges to natural resource professionals and farmers. Its interference with agricultural crops, grassland forbs, forest ground flora, and its ability to replace native plant species are of serious concern. Therefore, it is pertinent to monitor its continuous spread, its entry into new geographic regions, the extent of its impact, and the associated evolutionary changes. While management strategies should be improvised to control its spread and reduce its adverse impacts, the possible utilization of this noxious weed for pharmacological and agronomic purposes should also be explored. The objective of this review is to provide a detailed account of the global distribution, biological activities, ecological and environmental impacts, and strategies for the management of the agro-environmental weed A. conyzoides.

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“…First, using goal-oriented forage grass promotes the benefits of restoration, especially the use of nitrogen-fixing pastures. Rhizosphere microbes showed that colonizing annual plants accelerated the process of soil fertility improvement in a short natural restoration time (1 to 5 years) that potentially boosted vegetation succession [8]. In addition, mixing nitrogen-fixing pastures with other local plants may produce synergistic effects [9].…”

Section: Introductionmentioning

confidence: 99%

Could Land Abandonment with Human Intervention Benefit Cropland Restoration? From the Perspective of Soil Microbiota

Zhang

et al. 2021

Land

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Although agricultural land abandonment (LA) is accompanied by land degradation, it could be considered a kind of self-rehabilitation. Studies have shown that long-term LA has profound ecological and environmental benefits, whereas few studies have compared LA with human intervention (HI), which involves planting and fertilization in agroecosystem restoration. Here, we established four different scenarios based on local livestock husbandry, including LA without HI, LA with slight human intervention (HIS), medium human intervention (HIM), and intensive human intervention (HII). LA experiments were conducted for 3 years and repeatedly sampled three times. The soil bacterial and fungal communities were determined to present the ecological impacts. In this study, LA and HIS could save soil inorganic carbon and total calcium (Ca) contents and benefit soil mycorrhizal fungi and plant growth-promoting rhizobacteria. LA and HIM benefited some microbial communities associated with complicated organic compounds. Human interference methods did not significantly increase soil nutrients after 3 years of farmland abandonment. However, indigenous vegetation increased the risk of plant diseases based on soil microbial communities. Forage grass may control the risk, and HIS was a cost-effective scenario in our study. Moreover, we should maintain a cautious attitude toward HII to prevent excessive intervention.

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Impact of Rhizosphere Microbes of Three Early Colonizing Annual Plants on Improving Soil Fertility During Vegetation Establishment Under Different Fallow Periods Following Shifting Cultivation

Cited by 9 publications

References 23 publications

Insights into the impacts of autotoxic allelochemicals from rhizosphere of Atractylodes lancea on soil microenvironments

Insights into the impacts of autotoxic allelochemicals from rhizosphere of Atractylodes lancea on soil microenvironments

Ecology, Biology, Environmental Impacts, and Management of an Agro-Environmental Weed Ageratum conyzoides

Could Land Abandonment with Human Intervention Benefit Cropland Restoration? From the Perspective of Soil Microbiota

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