The responses of soil enzyme activities, microbial biomass and microbial community structure to nine years of varied zinc application rates

Liu, Yumin; Cao, Wenqing; Chen, Xiuxiu; Yu, Bao-Gang; Lang, Ming; Chen, Xinping; Zou, Chunqin

doi:10.1016/j.scitotenv.2020.140245

Cited by 33 publications

(20 citation statements)

References 78 publications

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“…In this study, low concentrations of Zn fertilizer (Z1 and Z2) markedly promoted height, diameter at stem base and leaf area of pecan seedlings, which is in agreement with findings of previous studies (Liu et al 2019(Liu et al , 2020. High concentrations of Zn fertilizer (Z3 and Z4) restricted the growth of seedlings and the inhibitory effect strengthened with the increase in Zn concentration.…”

Section: Discussionsupporting

confidence: 93%

“…To a certain degree, Zn absorption depends on the size of the available Zn pool in the soil (Liu et al 2019); therefore, Zn fertilization is an effective strategy to increase Zn concentrations in the soil. However, Zn toxicity is harmful to plants and can occur when the Zn content in plant tissues exceeds the content required or when the soil contains excess Zn, which is detrimental to soil quality (Nair & Chung 2017;Garcia-Gomez et al 2018;Liu et al 2020) and can even cause environmental pollution (Zhou et al 2020). Consequently, although it is necessary to increase the output of crops or trees via fertilization, precise management of nutrients is vital for sustainable production in agriculture and forestry, especially with respect to the maintenance of microelements, which help promote fruit set, yield and quality.…”

Section: Introductionmentioning

confidence: 99%

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Effects of zinc application on the growth and photosynthetic characteristics of pecan at the seedling stage

et al. 2021

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Pecan (Carya illinoinensis) is sensitive to Zn, which is involved in basic physiological and biochemical processes.• To explore the growth and physiology of pecan in response to Zn application, we used 1-year-old annual grafted seedlings (Pawnee) and applied four concentrations of Zn fertilizer (0.05, 0.10, 0.20 and 0.40 gÁplant À1 ); a control (CK; no Zn fertilization) was also included. The growth characteristics, anatomical structure of the leaves and photosynthesis were assessed.• Compared with the CK, photosynthesis and chlorophyll (Chl) fluorescence parameters, leaf area and leaf structure significantly increased at Zn concentrations of 0.05 and 0.10 gÁplant À1 . In addition, growth of pecan at the seedling stage increased in response to moderate Zn application. In contrast, treatment with 0.20 and 0.40 gÁZnÁplant À1 dramatically decreased these physiological indices and inhibited pecan growth.• The results show that moderate soil Zn application promotes pecan growth and development by increasing photosynthesis. However excess Zn concentrations were not conducive to seedling growth. The concentration of 0.1 gÁZnÁplant À1 was best when considering long-term soil Zn applications, providing a theoretical foundation for microelement management of pecan.

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Section: Discussionsupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Effects of zinc application on the growth and photosynthetic characteristics of pecan at the seedling stage

et al. 2021

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“…The changes in the SMBC are the result of microbial growth and decomposition of OM (Liu et al, 2020). The results of the present study showed that the high biochar application (60 t ha −1 ) with both low and high N increased the SMBC, indicating that the addition of biochar promoted microbial growth.…”

Section: Different Effect Of Biochar and N On Soil Microbial Biomass supporting

confidence: 49%

Combined application of biochar and nitrogen fertilizer improves rice yield, microbial activity and N-metabolism in a pot experiment

Ali

Ullah

et al. 2020

PeerJ

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The excessive use of synthetic nitrogen (N) fertilizers in rice (Oryza sativa L.) has resulted in high N loss, soil degradation, and environmental pollution in a changing climate. Soil biochar amendment is proposed as a climate change mitigation tool that supports carbon sequestration and reduces N losses and greenhouse gas (GHG) emissions from the soil. The current study evaluated the impact of four different rates of biochar (B) (C/B0-0 t ha−1, B1-20 t ha−1, B2-40 t ha−1, and B3-60 t ha−1) and two N levels (N1; low (270 kg N ha−1) and N2; high (360 kg N ha−1)), on rice (cultivar Zhenguiai) grown in pots. Significant increases in the average soil microbial biomass N (SMBN) (88%) and carbon (87%) were recorded at the highest rate of 60-ton ha−1B and 360 kg N ha−1 compared to the control (N1C) during both seasons (S1 and S2). The photochemical efficiency (Fv/Fm), quantum yield of the photosystem (PS) II (ΦPS II), electron transport rate (ETR), and photochemical quenching (qP) were enhanced at low rates of biochar applications (20 to 40 t B ha−1) for high and low N rates across the seasons. Nitrate reductase (NR), glutamine synthetase (GS), and glutamine 2-oxoglutarate aminotransferase (GOGAT) activity were, on average, 39%, 55%, and 63% higher in the N1B3, N2B2, and N2B3 treatments, respectively than the N1C. The grain quality was higher in the N1B3 treatment than the N1C, i.e., the protein content (PC), amylose content (AC), percent brown rice (BRP), and percent milled rice (MRP) were, on average, 16%, 28%, 4.6%, and 5% higher, respectively in both seasons. The results of this study indicated that biochar addition to the soil in combination with N fertilizers increased the dry matter (DM) content, N uptake, and grain yield of rice by 24%, 27%, and 64%, respectively, compared to the N1C.

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“…Investigating the amendment of soils with Zn salts has been undertaken in the context of Zn acting as a soil fertiliser. One 9 year field study applied a range of Zn concentrations to soils and found slight differences in the bacterial (but not fungal) community composition compared to the no Zn control (Liu, Cao et al, 2020). No differences in microbial community (alpha) diversity were observed.…”

Section: Impact On Soil Microbial Processes and Microbial Communitiesmentioning

confidence: 99%

The Microbiology of Metal Mine Waste: Bioremediation Applications and Implications for Planetary Health

Newsome

Falagán

2021

GeoHealth

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Microbes colonise and inhabit mine wastes, they tolerate high concentrations of metals and contribute to soil functioning and plant growth  Microbes transform metal speciation and environmental mobility, through metabolism, biogeochemical cycling and metal resistance mechanisms  Beneficial microbial activity can be stimulated to remediate metal-containing mine wastes, but more long-term field studies are required

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The responses of soil enzyme activities, microbial biomass and microbial community structure to nine years of varied zinc application rates

Cited by 33 publications

References 78 publications

Effects of zinc application on the growth and photosynthetic characteristics of pecan at the seedling stage

Effects of zinc application on the growth and photosynthetic characteristics of pecan at the seedling stage

Combined application of biochar and nitrogen fertilizer improves rice yield, microbial activity and N-metabolism in a pot experiment

The Microbiology of Metal Mine Waste: Bioremediation Applications and Implications for Planetary Health

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