Soil microbial C:N ratio is a robust indicator of soil productivity for paddy fields

Li, Yong; Wu, Jinshui; Shen, Jianlin; Liu, Shoulong; Wang, Cong; Chen, Dan; Huang, Tieping; Zhang, Jiabao

doi:10.1038/srep35266

Cited by 43 publications

(30 citation statements)

References 62 publications

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“…Negative correlation of maize biomass with microbial biomass C:N points out that the high C:N ratios of biochar lead to nitrogen immobilization in the soil and are disadvantageous to agricultural production. This matches those observed in earlier studies, which used other types of amended organic material [41,55].…”

Section: Effect Of Biochar On Maize Biomass Yield and Its Relationshisupporting

confidence: 91%

“…The statistically significant relationship found between microbial biomass N and maize biomass points out that microbial biomass can act as a significant sink and source of N [10]. However, the increment of microbial biomass N could not actually reflect the degree of soil fertility as the greater size of microbial biomass N may also indicates N immobilization [41], by which N is taken up by soil organisms and therefore inaccessible for crop uptake. On the other hand, the C:P and N:P are rarely systematically assessed in the agricultural soil, although the ecological stoichiometric relationships have been broadly studied in various terrestrial ecosystems [42].…”

Section: Effect Of Biochar On Soil Microbial Propertiesmentioning

confidence: 93%

“…This situation may interfere with plant nutritional requirements due to the nitrogen immobilization, which can become a limiting factor for the plant and the soil microorganisms. Previously, Li and co-authors [41] quantitatively showed a negative correlation of microbial biomass C:N with plant agronomic output, where a high ratio resulted in crop nitrogen deficiency. In this study, high reduction of microbial biomass C:N was achieved when biochar was co-applied with fertilizer.…”

Section: Effect Of Biochar On Soil Microbial Propertiesmentioning

confidence: 97%

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Linking Soil Microbial Properties with Plant Performance in Acidic Tropical Soil Amended with Biochar

et al. 2018

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Soil microbial properties are frequently used as indicators of soil fertility. However, the linkage of these properties with crop biomass is poorly documented especially in biochar amended soil with high carbon:nitrogen (C:N). A short-term field trial was conducted to observe the growth response of maize to biochar treatment in a highly weathered Ultisol of humid tropics and to observe the possible linkage of the measured microbial properties with maize biomass. Soil microbial biomass (carbon (C), nitrogen (N), phosphorus (P)), enzyme activity (β-glucosidase, urease, phosphodiesterase) and gene abundance (bacterial 16S rRNA, fungal ITS) were analyzed. For comparison, total soil C, N, and P were also analyzed. The data revealed no significant linkage of soil C, N, and P with maize biomass. A significant association of enzyme activity and gene abundance with maize biomass was not recorded. Strong positive correlation between maize above ground biomass with microbial biomass N was found (r = 0.9186, p < 0.01). Significant negative correlation was recorded between microbial biomass C:N with maize biomass (r = −0.8297, p < 0.05). These statistically significant linkages observed between microbial biomass and maize biomass suggests that microbial biomass can reflect the soil nutrient status, and possibly plant nutrient uptake. Estimation of microbial biomass can be used as a fertility indicator in soil amended with high C:N organic matter in the humid tropics.

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Section: Effect Of Biochar On Maize Biomass Yield and Its Relationshisupporting

confidence: 91%

Section: Effect Of Biochar On Soil Microbial Propertiesmentioning

confidence: 93%

Section: Effect Of Biochar On Soil Microbial Propertiesmentioning

confidence: 97%

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Linking Soil Microbial Properties with Plant Performance in Acidic Tropical Soil Amended with Biochar

et al. 2018

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“…During higher accumulation rate of N and lower soil C/N ratio, the capacity of conserving nitrogen by carbon saturates rapidly, which would lead to potential environmental risk and declined soil productivity (Lei et al, 2014). Li et al (2016) found a significant negative correlation of annual rice yield with soil microbial C/N ratio, confirming soil microbial C/N ratio as a robust indicator for paddy soil productivity. They also proposed management practices to improving rice yield, using manure amendments in the long‐term or using biochar amendment in the short‐term (Li et al, 2016).…”

Section: Discussionmentioning

confidence: 89%

Integrated Water and Nitrogen Management Practices to Enhance Yield and Environmental Goals in Rice–Ratoon Rice Systems

et al. 2019

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Water and N management play a vital role in rice (Oryza sativa L.) production; however, limited information is available on the options to increase rice yield in rice-ratoon rice systems, including an appropriate combination of water regime (W), N application rate (N AR ) and N application method (N AM ). To address this question, field experiments were conducted with two Ws [simplified alternate wetting and drying (SAWD) and continuous flooding (CF)], four N ARs (control, N 0 ; 180 kg N ha -1 , N 180 ; 255 kg N ha -1 , N 255 ; and330 kg N ha -1 , N 330 ) and two N AMs [45% of fertilizer pre-plant, 15% of fertilizer at tilling, 40% of fertilizer at bud (BTB) and 45% of fertilizer preplant, 15% of fertilizer at boot, 40% of fertilizer during grain filling (BPG)]. On average, the grain yields of the main crop, the ratoon crop, and their total for SAWD were 3.7%, 6.8%, and 4.4% higher than for CF, respectively. The relationships between N AR and the main crop, ratoon crop, and total yields were well fitted by quadratic equations. The rice yields of the main crop, ratoon rice, and their total under BPG were equal to or slightly higher than those under BTB. The interactive effect of W×N AR was significant on the main rice crop yield and total rice yield, but W×N AM , N AR ×N AM and W×N AR ×N AM were all related to the soil-based yield. The use of integrated water and N management practices could achieve high yields and reduce water and N inputs in rice-ratoon rice systems. core Ideas• The relationships between N AR and the main crop, ratoon crop, and total yields were well fitted by quadratic equations. • The interactive effect of W×N AR was significant on the main rice crop yield and total rice yield, but W×N AM , N AR ×N AM and W×N AR ×N AM were all related to the soil-based yield. • The use of the SAWD-N 180 -BPG treatment could achieve high yields and reduce water and N inputs in rice-ratoon rice systems.

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“…The negative correlation, but non-significant (P > 0.05) between maize yield and total soil organic carbon, total soil nitrogen and available phosphorus was obtained by Muniafu and Kinyamario (2007). In the research of soil microbial biomass (SMB) C:N ratio on paddy fields, the authors obtained a significant, negative correlation (r = -0.99; P ~ 0.0) of rice yield with SMB C:N ratio (Li et al 2016). The researchers suggest that the crop yield mainly depends on the soil moisture content and the ability of the plants to receive light (Zhao et al 2002, Pandey andSingh 2006).…”

Section: Resultsmentioning

confidence: 99%

Effects of maize and winter wheat grown under different cultivation techniques on biological activity of soil

Furtak¹,

Gawryjołek²,

Gajda³

et al. 2017

Plant Soil Environ.

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The aim of the study was to compare the activity and functional biodiversity in soil under two different cereals: common maize and winter wheat, both grown in the same pattern of cultivation techniques: conventional (to 25 cm depth) and reduced (to 10 cm depth). Soil samples for comparative analysis were collected at the same time (July 2016) at a long-term field experiment, which was carried out in 2013–2016. Soil biological activity was determined by measurement of dehydrogenases activity (DHa) with TTC (2,3,5-triphenyltetrazolium chloride) application, microbial biomass carbon (MBC) and nitrogen (MBN) content by fumigation-extraction method, and functional diversity of soil microorganisms using the Biolog EcoPlate System. The results demonstrated that the cultivation technique had a greater impact on the soil biological activity, compared to the type of cereal. Higher biological activity was found in the soil under reduced tillage in both cereals. Calculated correlations showed that DHa, MBC, MBN and acid phosphatases were positively correlated with each other. The negative correlation obtained between yield and biological parameters of activity in soil was not expected.

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Soil microbial C:N ratio is a robust indicator of soil productivity for paddy fields

Cited by 43 publications

References 62 publications

Linking Soil Microbial Properties with Plant Performance in Acidic Tropical Soil Amended with Biochar

Linking Soil Microbial Properties with Plant Performance in Acidic Tropical Soil Amended with Biochar

Integrated Water and Nitrogen Management Practices to Enhance Yield and Environmental Goals in Rice–Ratoon Rice Systems

Effects of maize and winter wheat grown under different cultivation techniques on biological activity of soil

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