Treated Wheat Straw Research Articles

Targeted addition of CeO2 nanoparticles to promote methane production in anaerobic digestion systems of wheat straw

As a large agricultural country, China produces a large amount of wheat straw each year that needs to be treated harmlessly. Anaerobic digestion (AD) has a great potential to produce clean energy biogas while treating wheat straw. AD as a typical fermentation process, the regeneration of NAD+ is achieved by fermentation using NADH to reduce metabolic intermediates and therefore there is a lack of reduction capacity in the metabolic process. The low reducing power of the digestion system and the low methane yield of wheat straw in the AD process have limited the further development of this technology. Cerium dioxide nanoparticles (CDNs) are known for their excellent reducing powers. At the same time the large amount of cerium contained in the earth provides the conditions for its large-scale use. In this study, we evaluated the effects of CDNs on the AD of wheat straw. The CDNs were successfully prepared via hydrothermal synthesis. The particle size of CDNs was about 5 nm, the measured specific surface area was 168.02 m2/g, and the zeta potential was 10.70 mV. Experiments involving volatile fatty acids (VFAs), cyclic voltammetry curves, electrochemical impedance spectroscopy, oxidation-reduction potential, and NADH/NAD+ showed that CDNs effectively enhanced the reducing power and utilization of VFAs. Additionally, the cumulative methane production of the C10 group was 20.15% higher than CK group, reaching 367.78 mL CH4/g·VS. The cumulative methane production was well fitted using the modified Gompertz equation (R2 = 0.99677). Analysis of microbial community structure showed that CDNs increased bacterial abundance in hydrolytic acidification. The reduction ability of CDNs is very important for the improvement of the methane production efficiency of AD, which is of great interest for the study of nanoparticles that promote AD.

Aspergillus niger Enhances Organic and Inorganic Phosphorus Release from Wheat Straw by Secretion of Degrading Enzymes and Oxalic Acid.

To explore the mechanisms of crop straw degradation and phosphorus (P) release by phosphate-solubilizing fungi (PSF), a typical PSF Aspergillus niger (A. niger, ANG) was investigated for the degradation of wheat straw (WST) in this work. The results revealed that A. niger significantly increased wheat straw degradation (30%) compared with no A. niger treatment (7.7%). Meanwhile, more than 92% of total P was released from WST by A. niger, much higher than from WST treatment (69.5%). Although the ratios of inorganic P release between WST and WST + ANG treatments were similar (17.6 vs 19.7%), a significant difference occurred between their release of organic P, i.e., WST (51.9%) vs WST + ANG (72.5%). The high enzyme activity of β-1,4-glucanase and β-glucosidase produced by A. niger contributed to the wheat straw degradation and organic P release compared with no A. niger treatment. Oxalic acid secreted by A. niger dominated the release of inorganic P from WST. Our findings suggested that A. niger is an efficient microbial agent for crop straw degradation and P release, which could be a candidate in the pathway of straw return.

Effect of Water Absorption on the Mechanical Properties of Wheat Straw Fibre Reinforced Polystyrene Composites

The present work deals with the effect of water absorption on the mechanical properties of alkali plus silane treated wheat straw reinforced polystyrene composites. Wheat straw polystyrene composite was prepared with different fibre loading (5%, 10%, 15%, 20%, 25%) by compounding process using twin screw extruder. Samples were prepared by the compression moulding process. There was a decrease in the tensile strength initially at 5% fibre loading followed by an increase in it with higher fibre loading. There is an increase in flexural strength up to 15% fibre loading followed by decrease in it with higher fibre loading. There is an increase in the hardness initially at 5% fibre loading followed by decrease in it with higher fibre loading. There is an increase in water absorption with percentage increase in fibre loading. Tensile strength, flexural strength, and hardness of alkali plus silane treated wheat straw reinforced polystyrene composites with water absorption is always less than alkali plus silane treated wheat straw reinforced polystyrene composites without water absorption.

Effects of segmented aerobic and anaerobic fermentation assisted with chemical treatment on comprehensive properties and composition of wheat straw

Traditional aerobic composting used for straw treatment shows limited regulation effects and unstable properties, and it is necessary to introduce some co-processing methods to optimize its performance. Herein, segmented aerobic/anaerobic fermentation, combined with chemical treatment with wood vinegar/NaOH, was used to treat wheat straw. The results showed that anaerobic fermentation when used as the first stage could stabilize the wheat straw pH between 5.19 and 6.13 and improve nutrient contents. All treatments had greater effects on substrate aeration porosities (range of 14%) than on total porosity (range of 6%), and the water-holding porosities were improved to a greater extent by NaOH than by wood vinegar. The hemicellulose degradation rate of aerobic-anaerobic treatment was higher than that achieved with anaerobic-aerobic treatment, while the latter method was more effective at removing the neutral detergent-soluble as well as remaining organic matter, which was generated due to a higher KCl content in the ash.

Biogas production via anaerobic codigestion of chemically treated wheat straw with sewage sludge or cow manure

Biogas production via anaerobic codigestion of chemically treated wheat straw with sewage sludge or cow manure

Bacterial dynamics and functions driven by bulking agents to enhance organic degradation in food waste in-situ rapid biological reduction (IRBR).

This study investigated the effects of different bulking agents (i.e., sawdust, wheat straw, rice straw, and corncob) on bacterial structure and functions for organic degradation during food waste in-situ rapid biological reduction (IRBR) inoculated with microbial agent. Results showed that the highest organic degradation (409.5g/kg total solid) and volatile solids removal efficiency (41.0%) were achieved when wheat straw was used, largely because the degradation of readily degradable substrates and cellulose was promoted by this bulking agent. Compared with other three bulking agents, the utilization of wheat straw was conducive to construct a more suitable environmental condition (moisture content of 18.0-28.2%, pH of 4.91-5.87) for organic degradation during IRBR process, by virtue of its excellent structural and physiochemical properties. Microbial community analysis suggested that the high-moisture environment in rice straw treatment promoted the growth of Staphylococcus and inhibited the activity of the inoculum. By contrast, lowest bacterial richness was observed in corncob treatment due to the faster water loss. Compared with these two bulking agents, sawdust and wheat straw treatment led to a more stable bacterial community structure, and the inoculated Bacillus gradually became the dominant genus (36.6-57.8%) in wheat straw treatment. Predicted metagenomics analysis showed that wheat straw treatment exhibited the highest carbohydrate metabolism activity which improved the pyruvate, amino sugar and nucleotide sugar metabolism, and thereby promoted the organic degradation and humic substrate production. These results indicated that wheat straw was a more desirable bulking agent, and revealed the potential microbial organics degradation mechanism in IRBR process.

Evaluation of the applicability of organic amendments from microbially driven carbon and nitrogen transformations

Pig manure (PM), wheat straw (WS), compost product (CP) and improved compost product (IC) are very important agricultural organic resources. In this study, their applicability as soil organic fertilizations (OFs) in terms of their properties and influence on soil properties through an incubation experiment and a field verification were evaluated. The property differences indicated that wheat straw has the highest C/N ratio, and compost products contain more aromatic compounds compared with pig manure and wheat straw. The results of incubation experiment showed that OFs promoted the carbon and nitrogen transformation driven by related microorganisms and their functional metabolisms. The PM treatment had the highest proportion of Labile organic carbon to soil organic carbon (LOC/SOC) and ratio of dissolved organic carbon to soil organic carbon (DOC/SOC), while WS treatment had the lowest values. The highest net N mineralization rate and nitrification rate was observed in the WS treatment, but the lowest amounts were under the PM treatment. Additionally, the similar findings were also obtained from the field examination. Therefore, compost products were more applicable in agricultural soil as OF insight from changes in carbon, nitrogen and microbial community. Furthermore, the result of UV-vision showed that the largest amount of aromatic structure was observed in IC relative to CP. It can be concluded that CP was more conducive to fix carbon and provide available nitrogen for crops among four OFs.

Investigating the Effect of Vermifiltration with Different Bulking Agents on Some Important Properties of Municipal Sewage Influent

Background: Farmers have been persuaded to use wastewater in agriculture due to drought and water deficiency. However, an important challenge is the environmental constraints. Methods: This study investigated the effect of vermifiltration on the properties of sewage influent. The sewage influent was obtained from the aerated lagoons of the Qahdarijan wastewater treatment plant, Isfahan Province, Iran. The sewage was mixed with Rice Husk (RH) and Wheat Straw (WS) as the bulking agents at three proportions (0%, 5%, and 10%v/v). Then, EarthWorm (EW) (Eisenia fetida) were added to the sewage sludge in two proportions (0 and 50 adult earthworms/6 kg sewage sludge). Results: The results showed a significant decrease in electrical conductivity (about 100% decrease compared to the control), total dissolved solids (up to 3 times in RH0+ EW treatment less than the control), total suspended solids (up to 90 times in WS10+EW and RH+EW treatments decrease compared to the control), biochemical oxygen demand (significant decrease in RH levels+EW compared to other treatments), and chemical oxygen demand (a reverse status was observed for WS and RH treatments, but the role of vermifiltration was considerable). The concentration of Pb was significantly decreased in WS when it was enriched with earthworms (about an 8% decrease compared to control), but a reverse status was observed for RS treatment. Conclusion: Vermifiltration may be an efficient tool for improving the properties of wastewater to use in agriculture, but more studies are suggested to evaluate different aspects of this technique.

Impact of mixed lignocellulosic substrate and fungal consortia to enhance cellulase production and its application in NiFe2O4 nanoparticles mediated enzymatic hydrolysis of wheat straw

Economic biowaste to biofuels production technology suffers from issues including high production cost of cellulase enzyme and its low efficiency. In this study five lignocellulosic biomass based on their high cellulosic contents are employed in 1:1 ratio with mixed fungal consortia to achieve enhance cellulase production via solid state fermentation. Under the optimum condition total 41 IU/gds FP activity was achieved in 120 h at 40 °C and pH 6.0. Further, crude cellulase was evaluated to improve thermal and pH stability under the influence of 2.0 mg/L NiFe2O4 nanoparticles, showed stability at 70 °C and pH 6.0 up to 8 h. Consequently, NiFe2O4 nanoparticles treated cellulase was used for the enzymatic hydrolysis of alkali treated wheat straw, and total 53 g/L reducing sugars could be produced in 18 h at 65 °C and pH 6.0. Thus, nanoparticles mediated enzymatic hydrolysis exhibited ∼ 29% and ∼ 28% higher sugar yield and productivity as compared to control after 18 h.

Valorisation of wheat straw and bioethanol production by a novel xylanase- and cellulase-producing Streptomyces strain isolated from the wood-feeding termite, Microcerotermes species

Lignocellulosic biomass represents an unlimited and ubiquitous energy source, effectively addressing current global energy demand challenges. However, the recalcitrant nature of lignocellulose hinders microbial degradation, necessitating an appropriate hydrolytic enzyme production source for biomass valorisation and bioethanol production. This study might be the first to explore a novel bacterial species Streptomyces sp. strain MS-S2, isolated from the higher wood-feeding termite, Microcerotermes sp.; capable of concurrent degradation and saccharification of wheat straw for the liberation of reducing sugars, which can further be converted to bioethanol. The Streptomyces sp. MS-S2 demonstrated the capacity to efficiently utilise wheat straw as the sole carbon source for the secretion of xylanase and cellulase enzymes. The highest cellulase and xylanase productions were observed for ten days when the bacterium was cultured in the medium amended with 15 g/L of wheat straw and 1.5% yeast extract at pH 8.0, 30 ℃. Under optimum conditions, xylanase and cellulase activities were estimated to be 6.560 ± 0.160 and 0.866 ± 0.067 U/mL, respectively. Through Scanning electron microscopy analysis, the surface accessibility of cellulose fibrils in treated wheat straw was observed, indicating the efficiency of the hydrolysis process. In addition, functional group modifications from Fourier transform infrared spectroscopy analysis demonstrated the successful depolymerisation of wheat straw. Further, excreted enzymes produced under optimal conditions were applied to wheat straw hydrolysis for the liberation of reducing sugars. Then, ethanol production was obtained at a maximum concentration of 10.8 g/L. The findings of this study could open a new path for the search of new lignocellulolytic-producing bacteria inhabiting the gut symbionts of wood-feeding termites to valorise lignocellulosic biomass into biotechnologically value-added products such as biofuels.

Improving the nutritional value and digestibility of wheat straw, rice straw, and corn cob through solid state fermentation using different Pleurotus species.

The growing food-feed-fuel competition, declining availability of traditional feeds, higher prices, and the urgent need to provide long-term sustainability for animal production have all triggered global research into the optimum extraction of energy and nutrients from lignin-rich plant biomass. Recent studies have shown that the Pleurotus species of white rot fungus can selectively degrade lignin in lignin-rich plant biomass; however, its effectiveness in selectively degrading lignin depends on the type of substrate and species of fungus. This study was therefore designed to treat wheat straw, rice straw, and corn cob, with Pleurotus eryngii, P. ostreatus, and P. florida for 30 days under solid-state fermentation, to identify a promising fungus-substrate combination for the selective degradation of lignin and optimal improvement in the nutritional value and digestibility of each substrate. The type of fungus strongly influenced (P < 0.01) selectivity in lignin degradation, and the level of improvement in crude protein (CP), in vitro dry matter digestibility (IVDMD), and in vitro gas production (IVGP), in wheat straw, rice straw, and corn cob. Fungus-substrate interaction data revealed that P. ostreatus caused maximum (P < 0.05) degradation of lignin, and greater (P < 0.05) improvement in CP, IVDMD, and IVGP in wheat straw and rice straw. The lowest (P < 0.05) degradation of lignin and improvement in CP, IVDMD, and IVGP was caused by P. eryngii in corn cob. Among the fungi, the maximum (P < 0.05) degradation of lignin, and greater (P < 0.05) improvement in CP, IVDMD, and IVGP were caused by P. florida as compared with those of P. ostreatus and P. eryngii. The results highlight significant influence of fungus-substrate combination for selective lignin degradability and the consequent improvement in the nutritional value of the substrates. Maximum selective lignin degradability and improvement in nutritional value and digestibility was caused by P. ostreatus in wheat straw and in rice straw, and by P. florida in corn cob. © 2021 Society of Chemical Industry.

Dimensional stability and mechanical properties of bio-based composites produced from hydro-thermal treated wheat straw

Bio-composites were produced from untreated (UT) and hydro-thermally treated (HTT) wheat straw (WS) particles and wood, and their dimensional stability and mechanical properties were investigated. The HTT treatment consisted of subjecting the WS particles to a steam explosion process for 8 min at 180 °C. The HTT and UT WS particles were mixed with the wood particles at 10, 20, 30, and 40% ratios. The physical properties, including density, water absorption (WA), and thickness swelling (TS), were determined for the bio-based composites. The mechanical properties evaluated included the modulus of rupture, modulus of elasticity, and internal bond strength. Statistical analyses showed that the hydro-thermal treatment and the WS ratio had significant effects on the dimensional stability and mechanical properties of the bio-composites. The WA of the composites after 2-h and 24-h rose significantly when the HTT WS particle ratio was increased from 10 to 40%. The 2-h and 24-h WA values of HTT-10 were 6.3% and 5.3% lower than those of UT-10, respectively. Improvements in the 2-h TS value were achieved by the HTT WS particles at the 10% ratio, and in the 24-h TS value at the 10 and 40% ratios. The mechanical properties of the composites were higher in the HTT group, but decreased in both the UT and HTT groups as the WS ratio increased.

Evaluation of physiochemical, thermal and kinetic properties of wheat straw by demineralising with leaching reagents for energy applications

The augmented concerns towards greenhouse emissions have stimulated the innovative technologies to reduce the carbon footprints and lessen the usage of fossil fuel by replacing them with biomass. Wheat straw is a biowaste and has a great potential for energy-production. However, the inorganic contents in the wheat straw cause operational problems such as low heat transfer and ash-deposition in combustion chamber leading to high maintenance requirements. Demineralization of wheat straw with various basic and acidic leaching reagents (NaOH, HCl, HNO3) was investigated in this study. The concentrations of leachants was varied from 0.6, 0.4 and 0.2M to study their effect on physical, chemical, thermal and kinetic behavior of the biomass. The 0.6 M HCl solution reduced the maximum ash content up to 92.71 % and raised the heating value to 3.98 % than raw wheat straw. The kinetic study of the samples treated with 0.6M HCl demonstrated the superior ignition and the activation-energy than other samples. On other hand NaOH damaged the structure of the wheat straw and had adverse effects on their physical and chemical properties. The results of the current study suggested that HCl treated wheat straw can provide a cost effective and eco-friendly solution for energy generation.

Effects of Different Biochar Amendments on Soil Enzyme Activities and Carbondioxide Emission

ABSTRACT Biochar production from organic waste offers an important alternative for waste management, also improves soil properties (bio-physico-chemical) and reduces heavy metal pollution risk caused by the excessive use of chemical fertilizers applied directly to the soils. Biochar is also proposed as an important management strategy to mitigate the negative impacts of greenhouse gases, which are among the most important causes of global climate change. This study aimed to investigate the effects of biochars produced from six different plant wastes on soil enzyme activity, CO2–C emission, total nitrogen (Nt), and nitrate (NO3–N) concentrations. Almond shell (AS), tobacco waste (TW), pomegranate peel (PP), cotton waste (CW), orange peel (OP), and wheat straw (WS) biochars were applied to the soil at the rates of 0.5, 1.0, and 1.5%, and the biochar amended soils were incubated in the laboratory environment (25 ± 2) for 37 weeks. The highest CO2 ̶ C emission was recorded in OP biochar treatment, while the lowest emission was measured in PP treatment, indicating that OP biochar addition tended to decrease C mineralization in the soil. The addition of AS biochar significantly increased the dehydrogenase and urease enzyme activities, while urease activity did not show a significant increase. The results can be attributed to the differences in composition and properties (C: N ratio, pH) of the biochars applied as well as the nature of the feedstocks used in biochar production. Biochar applications increased the Nt and NO3–N concentrations of the soils, and the highest increase was obtained in the WS treatment. The results of the study revealed that PP biochar can be recommended to reduce CO2–C emission from soils, AS biochar has a significant effect on urease and dehydrogenase enzyme activities, and the effect of WS biochar on Nt and NO3–N concentrations of soils were higher than the other five biochar types.

Effect of Anaerobic Digestion Temperature and Manure Type on N and S Mineralization

ABSTRACT Digested, undigested and green organic amendments were used to improve soil fertility and minimize any harmful effects. To understand the events in soil, we evaluated the nitrogen (N) and sulfur (S) mineralization in soil after adding with cattle manure and green manure. Eleven organic amendments were fresh dairy cattle manure, digested cattle manure with different temperature, green manure digested and undigested. The organic matter mixed soil was 200 mg total N kg−1 soil on dry weight basis, and this rate was equivalent to about 180 kg N/ha. Water was added to each soil sample and was incubated at temperatures 20 ± 2 °C under anaerobic condition. Soil sampling was done at 7-day intervals up to 84 days of the experiment for analysis of available N and S contents. The availability of N and S in all amended soils increased with incubation time showing a maximum mineralization occurring within 84 days for N and 49 days for S then decreased. Soils amended with digested green manure released 169.8 mg N kg−1 during the 84-day incubation. At the end of the incubation, net N mineralization was observed from alfalfa digested treatment as 71.3% of the applied total N. At the end of the incubation (84 days), net S mineralization ranged from 1.75% in Alfalfa digested (T11) to 26.0% in wheat straw (T3) treatment. Significantly lower amounts of S mineralization was observed for the soil treated with different digested cattle slurry and straw condition as compared to undigested cattle manure.

Study on anti-corrosion of PVA-treated wheat straw and its application in reinforcement of a silty soil

Silty soils are usually with poor mechanical performance and thus need reinforcement to meet the requirements in geotechnical practices. Wheat straw is low-cost, environment-friendly and wide spread, which has a great potential for use as reinforcement of the silty soils. In this study, the anti-corrosion effect of polyvinyl alcohol (PVA) treated wheat straw was investigated through the pore area ratio tests and the tensile tests. Test results indicated that the wheat straw was greatly improved in anti-corrosion, and tensile strength was considerably enhanced after the treatment. The optimum concentration of PVA solution and immersion duration were suggested. The PVA-treated wheat straw was then buried in the silty soil, and its corrosion resistance to the environment in the soil was validated under different moisture conditions. The treated wheat straw was then used as the reinforcing material for improvement of a silty soil. Triaxial compression were carried out on the samples reinforced with the material of various inclusion contents and lengths. Stress–strain curves and strength of the reinforced soil samples were analyzed, and the optimum inclusion content and length were discussed. The California bearing ratio (CBR) tests were then performed for the reinforced soil with the optimum inclusion content and length, and the test results showed that the reinforced silty soils met the requirements on CBR of the subgrade.

Assessing the nutritional quality of fungal treated wheat straw: Compounds formed after treatment with Ceriporiopsis subvermispora and Lentinula edodes

A variety of secondary metabolites are formed and compounds released during the bioconversion of lignocellulosic biomass by white-rot fungi that can affect the nutritional value and acceptance of the biomass by ruminants. Changes in pH, ergosterol content, fibre and metabolites composition of wheat straw (WS) incubated with either Ceriporiopsis subvermispora or Lentinula edodes for up to 8 weeks were investigated. With increases in mycelium content, significant decreases in absolute amount of hemicellulose, acid detergent lignin and, to a lesser extent, cellulose were observed in both fungal treatments. Acidification mainly occurred within the first four weeks of incubation, coinciding with the largest changes in metabolites profile. Diverse compounds, including organic acids and soluble sugars increased or decreased with C. subvermispora and L. edodes treatment. None of the thirty-four common mycotoxins analyzed were detected in WS after 8 weeks of fungal incubation. These results provide important information for application of fungal treated WS that might affect animal acceptance and performance.

Effect of Silane Coupling Agent on Flexural Strength and Hardness of Wheat Straw Polystyrene Composites

In the present research work, the effect of silane treatment along with alkali treatment on flexural strength, flexural modulus, and hardness investigated. Wheat straw as a filler was added (5%, 10%, 15% and 20%) to polystyrene matrix to prepare wheat straw polystyrene composite. The wheat straw fibre was first treated with 20% NaOH and 1% silane coupling agent to prepare wheat straw polystyrene composite. The compounding process was carried out in twin-screw extruder and samples were prepared by the compression moulding process. There was an increase in flexural modulus (214%), flexural strength (44%), and hardness (28%) of composite with the addition of alkali and silane treated wheat straw fibre.

Studies on morphological, physico-chemical and mechanical properties of wheat straw reinforced polyester resin composite

In this research, wheat straw (the agricultural by-product from the wheat plant, scientific name Triticum) reinforced unsaturated polyester resin composites were developed by applying a simple and easy technique to improve supportable composite materials. Therefore, untreated and sodium hydroxide-treated wheat straws have been used to form a strong and durable composite. The morphological, chemical and thermal properties of these composites were explained scientifically by using scanning electron microscopy, Fourier-transform infrared spectroscopy, thermogravimetric analysis, differential scanning calorimetry, X-ray diffraction etc. Moreover, these eco-friendly composites were analyzed their mechanical, biodegradability, and water absorption properties and compared them. In detail, the tensile strengths of virgin resin (VR), untreated wheat straw reinforced composite (UTWSC), and 2% sodium hydroxide treated wheat straw reinforced composite (2TWSC) were found to be 11.75, 14.45, and 19.84 N/mm2 respectively. Therefore, the reinforcement performance of tensile strength for 2% sodium hydroxide treated composite of wheat straw (2TWSC) and the composite of untreated wheat straw (UTWSC) increased by ~ 69% and ~ 23% respectively than the composite of virgin resin. Again, the modified composite (2TWSC) was stronger (27%) and more durable (17%) than the untreated composite considering the mechanical strength and biodegradability. The TGA results indicate that the composites are stable up to 315 °C. This modified composite also shows superior crystallinity compared to the untreated one. The typical water absorption behavior follows the Fickian diffusion law. This developed sustainable composite could be used for chair, table, door panel, seatback, dashboard, park bench, cabinet, particleboard, fence, rooftop, etc.

Wheat straw and biochar effect on soil carbon fractions, enzyme activities, and nutrients in a tobacco field

Annual removal of tobacco residues and insufficient input of organic materials have exacerbated total organic carbon (TOC) depletion and soil degradation in a tobacco field in the Huanghuai area. Straw residue and biochar application may be effective ways to increase TOC accumulation and improve soil fertility. In this field experiment, wheat straw (WS) and wheat-straw-derived biochar (BC) with mineral fertilizer were compared with mineral fertilizer alone (CK), and we assessed their effects on soil organic carbon fractions, enzyme activities, and nutrients in Shandong Province, China, during 2016 and 2017. At 0–20 cm depth, the WS treatment had a greater overall effect on the measured soil properties. Compared with the control, the WS treatment significantly increased the concentrations of microbial biomass carbon (MBC), hot-water-extractable carbon (HWC), and permanganate-oxidizable carbon concentrations (POXC; by 252.41%, 107.02%, and 65.53%, respectively); the activities of sucrase, urease, and phosphatase (by 112.52%, 7.81%, and 34.33%, respectively); and the contents of alkaline hydrolysable nitrogen, available phosphorus, and available potassium (by 92.22%, 100.78%, and 10.57%, respectively). Compared with the control, the BC treatment significantly increased TOC content, MBC content, light fraction organic carbon (LFOC), and potassium (TK) concentration (by 74.93%, 86.24%, 153.73%, and 21.92%, respectively). Most soil enzyme activity and nutrient parameters were significantly correlated with MBC. Thus, straw application improved soil fertility by increasing the concentrations of high labile organic carbon fractions (HWC, MBC, and POXC), stimulating soil enzyme activities, and releasing more soil available nutrients, and BC addition contributed to the accumulation of TOC, MBC, LFOC, and TK.