Skip to main content

Advertisement

Log in

Effects of straw and biochar amendments on aggregate stability, soil organic carbon, and enzyme activities in the Loess Plateau, China

  • Research Article
  • Published:
Environmental Science and Pollution Research Aims and scope Submit manuscript

Abstract

Soil from the Loess Plateau of China is typically low in organic carbon and generally has poor aggregate stability. Application of organic amendments to these soils could help to increase and sustain soil organic matter levels and thus to enhance soil aggregate stability. A field experiment was carried out to evaluate the effect of the application of wheat straw and wheat straw-derived biochar (pyrolyzed at 350–550 °C) amendments on soil aggregate stability, soil organic carbon (SOC), and enzyme activities in a representative Chinese Loess soil during summer maize and winter wheat growing season from 2013 to 2015. Five treatments were set up as follows: no fertilization (CK), application of inorganic fertilizer (N), wheat straw applied at 8 t ha−1 with inorganic fertilizer (S8), and wheat straw-derived biochar applied at 8 t ha−1 (B8) and 16 t ha−1 (B16) with inorganic fertilizer, respectively. Compared to the N treatment, straw and straw-derived biochar amendments significantly increased SOC (by 33.7–79.6%), microbial biomass carbon (by 18.9–46.5%), and microbial biomass nitrogen (by 8.3–38.2%), while total nitrogen (TN) only increased significantly in the B16 plot (by 24.1%). The 8 t ha−1 straw and biochar applications had no significant effects on soil aggregation, but a significant increase in soil macro-aggregates (>2 mm) (by 105.8%) was observed in the B16 treatment. The concentrations of aggregate-associated SOC increased by 40.4–105.8% in macro-aggregates (>2 mm) under straw and biochar amendments relative to the N treatment. No significant differences in invertase and alkaline phosphatase activity were detected among different treatments. However, urease activity was greater in the biochar treatment than the straw treatment, indicating that biochar amendment improved the transformation of nitrogen in the soil. The carbon pool index and carbon management index were increased with straw and biochar amendments, especially in the B16 treatment. In conclusion, application of carbonized crop residue as biochar, especially at a rate of 16 t ha−1, could be a potential solution to recover the depleted SOC and enhance the formation of macro-aggregates in Loess Plateau soils of China.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5

Similar content being viewed by others

Abbreviations

ASD:

Aggregate size distribution

MWD:

Mean weight diameter

LI:

Lability index

CMI:

Carbon management index

CPI:

Carbon pool index

FTIR:

Fourier transform infrared

HLOC:

High labile organic carbon

LLOC:

Low labile organic carbon

LOC:

Labile organic carbon

MBC:

Microbial biomass carbon

MBN:

Microbial biomass nitrogen

PCA:

Principal component analysis

SOC:

Soil organic carbon

SOM:

Soil organic matter

TN:

Total nitrogen

References

  • Abiven S, Hund A, Martinsen V, Cornelissen G (2015) Biochar amendment increases maize root surface areas and branching: a shovelomics study in Zambia. Plant Soil 395:1–11

    Article  Google Scholar 

  • Alburquerque JA, Calero JM, Barrón V, Torrent J, del Campillo MC, Gallardo A, Villar R (2014) Effects of biochars produced from different feedstocks on soil properties and sunflower growth. J Plant Nutr Soil Sci 177:16–25

    Article  Google Scholar 

  • Ameloot N, De Neve S, Jegajeevagan K, Yildiz G, Buchan D, Funkuin YN, Prins W, Bouckaert L, Sleutel S (2013) Short-term CO2 and N2O emissions and microbial properties of biochar amended sandy loam soils. Soil Biol Biochem 57:401–410

    Article  CAS  Google Scholar 

  • Ataallah K, Muhammad N, Goswin H, K.G.I.D. K, Lis Wollesen de J, Lars E, Hans-Jörg V, Bo V I (2014) Biochar effects on soil aggregate properties under no-till maize. Soil Sci 179:273–283

  • Awad YM, Blagodatskaya E, Ok YS, Kuzyakov Y (2013) Effects of polyacrylamide, biopolymer and biochar on the decomposition of 14C-labelled maize residues and on their stabilization in soil aggregates. Eur J Soil Sci 64:488–499

    Article  CAS  Google Scholar 

  • Bailey VL, Fansler SJ, Smith JL, Jr BH (2011) Reconciling apparent variability in effects of biochar amendment on soil enzyme activities by assay optimization. Soil Biol Biochem 43:296–301

    Article  CAS  Google Scholar 

  • Benbi DK, Senapati N (2010) Soil aggregation and carbon and nitrogen stabilization in relation to residue and manure application in rice-wheat systems in northwest India. Nutr Cycl Agroecosyst 87:233–247

    Article  Google Scholar 

  • Blair GJ, Lefroy RD, Lisle L (1995) Soil carbon fractions based on their degree of oxidation, and the development of a carbon management index for agricultural systems. Crop Pasture Sci 46:1459–1466

    Article  Google Scholar 

  • Bossuyt H, Denef K, Six J, Frey SD, Merckx R, Paustian K (2001) Influence of microbial populations and residue quality on aggregate stability. Appl Soil Ecol 16:195–208

    Article  Google Scholar 

  • Burns RG, DeForest JL, Marxsen J, Sinsabaugh RL, Stromberger ME, Wallenstein MD, Weintraub MN, Zoppini A (2013) Soil enzymes in a changing environment: current knowledge and future directions. Soil Biol Biochem 58:216–234

    Article  CAS  Google Scholar 

  • Burrell DL, Zehetner F, Rampazzo N, Wimmer B, Soja G (2016) Long-term effects of biochar on soil physical properties. Geoderma 282:96–102

    Article  CAS  Google Scholar 

  • Calderón F, Haddix M, Conant R, Magrini-Bair K, Paul E (2013) Diffuse–reflectance Fourier-transform mid-infrared spectroscopy as a method of characterizing changes in soil organic matter. Soil Sci Soc Am J 77:1591–1600

    Article  Google Scholar 

  • Castellano M, Turturro A, Riani P, Montanari T, Finocchio E, Ramis G, Busca G (2010) Bulk and surface properties of commercial kaolins. App Clay Sci 48:446–454

    Article  CAS  Google Scholar 

  • Chen JH, Liu XY, Zheng JW, Zhang B, Lu HF, Chi ZZ, Pan GX, Li LQ, Zheng JF, Zhang XH, Wang JF, Yu XY (2013) Biochar soil amendment increased bacterial but decreased fungal gene abundance with shifts in community structure in a slightly acid rice paddy from Southwest China. Appl Soil Ecol 71:33–44

    Article  Google Scholar 

  • Chenu C, Bissonnais LY, Arrouays D (2000) Organic matter influence on clay wettability and soil aggregate stability. Soil Sci Soc Am J 64:1479–1486

    Article  CAS  Google Scholar 

  • De Gryze S, Six J, Brits C, Merckx R (2005) A quantification of short-term macroaggregate dynamics: influences of wheat residue input and texture. Soil Biol Biochem 37:55–66

    Article  CAS  Google Scholar 

  • De la Rosa JM, Faria SR, Varela ME, Knicker H, González-Vila FJ, González-Pérez JA, Antonio J, Keizer J (2012) Characterization of wildfire effects on soil organic matter using analytical pyrolysis. Geoderma 191:24–30

    Article  CAS  Google Scholar 

  • Demisie W, Liu ZY, Zhang MK (2014) Effect of biochar on carbon fractions and enzyme activity of red soil. Catena 121:214–221

    Article  CAS  Google Scholar 

  • Dong XL, Guan TY, Li GT, Lin QM, Zhao XR (2016) Long-term effects of biochar amount on the content and composition of organic matter in soil aggregates under field conditions. J Soils Sediments 16:1481–1497

    Article  CAS  Google Scholar 

  • Du ZL, Zhao JK, Wang YD, Zhang QZ (2016) Biochar addition drives soil aggregation and carbon sequestration in aggregate fractions from an intensive agricultural system. J Soil Sediment. doi:10.1007/s11368-015-1349-2

    Google Scholar 

  • Ellerbrock RH, Gerke HH (2004) Characterizing organic matter of soil aggregate coatings and biopores by Fourier transform infrared spectroscopy. Eur J Soil Sci 55:219–228

    Article  Google Scholar 

  • Gelaw AM, Singh BR, Lal R (2015) Organic carbon and nitrogen associated with soil aggregates and particle sizes under different land uses in Tigray, Northern Ethiopia. Land Degrad Dev 26:690–700

    Article  Google Scholar 

  • Grandy SA, Salam SD, Wickings K, McDaniel MD, Culman SW, Snapp SS (2013) Soil respiration and litter decomposition response to nitrogen fertilization rate in no-till corn systems. Agri Ecosyst Environ 179:35–40

    Article  CAS  Google Scholar 

  • Guan SY (1986) Soil enzyme and its research method. Agriculture Press, Beijing

  • Gul S, Whalen JK, Thomas BW, Sachdeva V, Deng H (2015) Physico-chemical properties and microbial responses in biochar-amended soils: mechanisms and future directions. Agric Ecosyst Environ 206:46–59

    Article  CAS  Google Scholar 

  • Hansen V, Müller-Stöver D, Munkholm LJ, Peltre C, Hauggaard-Nielsen H, Jensen LS (2016) The effect of straw and wood gasification biochar on carbon sequestration, selected soil fertility indicators and functional groups in soil: an incubation study. Geoderma 269:99–107

    Article  CAS  Google Scholar 

  • Hartley W, Riby P, Waterson J (2016) Effects of three different biochars on aggregate stability, organic carbon mobility and micronutrient bioavailability. J Environ Manag 181:770–778

    Article  CAS  Google Scholar 

  • Herath H, Camps-Arbestain M, Hedley M (2013) Effect of biochar on soil physical properties in two contrasting soils: an Alfisol and an Andisol. Geoderma 209:188–197

    Article  Google Scholar 

  • Hontoria C, Gómez-Paccard C, Mariscal-Sancho I, Benito M, Pérez J, Espejo R (2016) Aggregate size distribution and associated organic C and N under different tillage systems and Ca-amendment in a degraded Ultisol. Soil Till Res 160:42–52

    Article  Google Scholar 

  • Huang S, Zeng YJ, Wu JF, Shi QH, Pan XH (2013) Effect of crop residue retention on rice yield in China: a meta-analysis. Field Crop Res 154:188–194

    Article  Google Scholar 

  • Ibrahim M, Cao CG, Zhan M, Li CF, Iqbal J (2015) Changes of CO2 emission and labile organic carbon as influenced by rice straw and different water regimes. Inter J Environ Sci Tech 12:263–274

    Article  CAS  Google Scholar 

  • Jenkinson DS, Ladd JN (1981) Microbial biomass in soil: measurement and turnover. In: Paul EA, Ladd JN (eds) Soil biochemistry, vol 5. Marcel Dekker, New York, pp 415–471

    Google Scholar 

  • Joseph SD, Camps-Arbestain M, Lin Y, Munroe P, Chia CH, Hook J, Zwieten LV et al (2010) An investigation into the reactions of biochar in soil. Soil Res 48:501–515

    Article  CAS  Google Scholar 

  • Lal R (2009) Challenges and opportunities in soil organic matter research. Eur J Soil Sci 60:158–169

    Article  CAS  Google Scholar 

  • Lehmann J, Joseph S (2015) Biochar for environmental management: an introduction. In: Lehmann J, Joseph S (eds) Biochar for environmental management: science, technology and implementation, 2nd edn. Earthscan from Routledge, London, pp 1–1214

    Google Scholar 

  • Lehmann J, Rillig MC, Thies J, Masiello CA, Hockaday WC, Crowley D (2011) Biochar effects on soil biota—a review. Soil Biol Biochem 43:1812–1836

    Article  CAS  Google Scholar 

  • Lenka NK, Lal R (2013) Soil aggregation and greenhouse gas flux after 15 years of wheat straw and fertilizer management in a no-till system. Soil Till Res 126:78–89

    Article  Google Scholar 

  • Li B, Bi ZC, Xiong ZQ (2016a) Dynamic responses of nitrous oxide emission and nitrogen use efficiency to nitrogen and biochar amendment in an intensified vegetable field in southeastern China. GCB Bioenergy

  • Li S, Li YB, Li XS, Tian XH, Zhao AQ, Wang SJ, Wang XX, Shi JL (2016b) Effect of straw management on carbon sequestration and grain production in a maize–wheat cropping system in Anthrosol of the Guanzhong Plain. Soil Tillage Res 157:43–51

    Article  Google Scholar 

  • Li S, Zhang SR, Pu YL, Li T, Xu XX, Jia YX, Deng OP, Gong GS (2016c) Dynamics of soil labile organic carbon fractions and C-cycle enzyme activities under straw mulch in Chengdu Plain. Soil Tillage Res 155:289–297

    Article  Google Scholar 

  • Liu ZX, Chen XM, Jing Y, Li QX, Zhang JB, Huang QR (2014) Effects of biochar amendment on rapeseed and sweet potato yields and water stable aggregate in upland red soil. Catena 123:45–51

    Article  CAS  Google Scholar 

  • Lu RK (2000) Methods of soil and agro-chemical analysis. China Agric Sci Tech Press, Beijing in Chinese

    Google Scholar 

  • Lu N, Liu XR, Du ZL, Wang YD, Zhang QZ (2014) Effect of biochar on soil respiration in the maize growing season after 5 years of consecutive application. Soil Res 52:505–512

    Article  CAS  Google Scholar 

  • Luo Y, Durenkamp M, De Nobili M, Lin Q, Devonshire BJ, Brookes PC (2013) Microbial biomass growth, following incorporation of biochars produced at 350 °C or 700 °C, in a silty–clay loam soil of high and low pH. Soil Biol Biochem 57:513–523

    Article  CAS  Google Scholar 

  • Ma NN, Zhang LL, Zhang YL, Yang LJ, Yu CX, Yin GH, Doane TA, Wu ZJ, Zhu P, Ma XZ (2016) Biochar improves soil aggregate stability and water availability in a Mollisol after three years of field application. PLoS One 11:e0154091

    Article  Google Scholar 

  • Malhi SS, Nyborg M, Solberg ED, McConkey B, Dyck M, Puurveen D (2011) Long-term straw management and N fertilizer rate effects on quantity and quality of organic C and N and some chemical properties in two contrasting soils in Western Canada. Biol Fertil Soils 47:785–800

    Article  CAS  Google Scholar 

  • Medina J, Monreal C, Barea JM, Arriagada C, Fernando B, Cornejo P (2015) Crop residue stabilization and application to agricultural and degraded soils: a review. Waste Manag 42:41–54

    Article  CAS  Google Scholar 

  • Nan XX, Tian XH, Zhang L, You DH, Wu YH, Cao YH (2010) Decomposition characteristics of maize and wheat straw and their effects on soil carbon and nitrogen contents. Plant Nutr Fertil Sci 16:626–633

    CAS  Google Scholar 

  • Nannipieri P, Giagnoni L, Renella G, Puglisi E, Ceccanti B, Masciandaro G, Fornasier F, Moscatelli MC, Marinari S (2012) Soil enzymology: classical and molecular approaches. Biol Fertil Soils 48:743–762

    Article  Google Scholar 

  • Oleszczuk P, Jośko L, Futa B, Pasieczna-Patkowska S, Pałys E, Kraska P (2014) Effect of pesticides on microorganisms, enzymatic activity and plant in biochar-amended soil. Geoderma 214:10–18

    Article  Google Scholar 

  • Paz-Ferreiro J, Fu S, Méndez A, Gascó G (2014) Interactive effects of biochar and the earthworm Pontoscolex corethrurus on plant productivity and soil enzyme activities. J Soils Sediments 14:483–494

    Article  CAS  Google Scholar 

  • Pedersen JA, Simpson MA, Bockheim JG, Kumar K (2011) Characterization of soil organic carbon in drained thaw-lake basins of Arctic Alaska using NMR and FTIR photoacoustic spectroscopy. Org Geochem 42:947–954

    Article  CAS  Google Scholar 

  • Peltre C, Bruun S, Du C, Thomsen IK, Jensen LS (2014) Assessing soil constituents and labile soil organic carbon by mid-infrared photoacoustic spectroscopy. Soil Biol and Biochem 77:41–50

    Article  CAS  Google Scholar 

  • Powlson DS, Glendining MJ, Coleman K, Whitmore AP (2011) Implications for soil properties of removing cereal straw: results from long-term studies. Agron J 103:279–287

    Article  CAS  Google Scholar 

  • Puttaso A, Vityakon P, Rasche F, Saenjan P, Treloges V, Cadisch G (2013) Does organic residue quality influence carbon retention in a tropical sandy soil? Soil Sci Soc Am J 77:1001–1011

    Article  CAS  Google Scholar 

  • Rebecca R (2007) Rethinking biochar. Environ Sci Technol 41:6032–6033

    Google Scholar 

  • Rossel RV, Behrens T (2010) Using data mining to model and interpret soil diffuse reflectance spectra. Geoderma 158:46–54

    Article  CAS  Google Scholar 

  • Simkovic I, Dlapa P, Doerr SH, Mataix-Solera J, Sasinkova V (2008) Thermal destruction of soil water repellency and associated changes to soil organic matter as observed by FTIR spectroscopy. Catena 74:205–211

    Article  CAS  Google Scholar 

  • Six J, Conant RT, Paul EA, Paustian K (2002) Stabilization mechanisms of soil organic matter: implications for C-saturation of soils. Plant Soil 241:155–176

    Article  CAS  Google Scholar 

  • Smidt E, Meissl K (2007) The applicability of Fourier transform infrared (FTIR) spectroscopy in waste management. Waste Manag 27:268–276

    Article  CAS  Google Scholar 

  • Soon KY, Lupwayi ZN (2012) Straw management in a cold semi-arid region: impact on soil quality and crop productivity. Field Crop Res 139:39–46

    Article  Google Scholar 

  • Soriano-Disla JM, Janik LJ, Viscarra Rossel RA, Macdonald LM, McLaughlin MJ (2014) The performance of visible, near-, and mid-infrared reflectance spectroscopy for prediction of soil physical, chemical, and biological properties. App Spectrosc Rev 49:139–186

    Article  CAS  Google Scholar 

  • Sparks DL, Page AL, Helmke PA, Loeppert RH, Soltanpour PN, Tabatai MA, Johnson CT, Sumner ME (1996) Methods of soil analysis: part 3—chemical methods. ASA-CSSA-SSSA, Madison, WI

    Google Scholar 

  • Udom BE, Nuga BO, Adesodun JK (2016) Water-stable aggregates and aggregate-associated organic carbon and nitrogen after three annual applications of poultry manure and spent mushroom wastes. Appl Soil Ecol 101:5–10

    Article  Google Scholar 

  • Vance ED, Brookes PC, Jenkinson DS (1987) An extraction method for measuring soil microbial biomass C. Soil Biol Biochem 19:703–707

    Article  CAS  Google Scholar 

  • Vieira FCB, Bayer C, Zanatta JA, Dieckow J, Mielniczuk J, He ZL (2007) Carbon management index based on physical fractionation of soil organic matter in an Acrisol under long-term no-till cropping systems. Soil Tillage Res 96:195–204

    Article  Google Scholar 

  • Villamil MB, Little J, Nafziger ED (2015) Corn residue, tillage, and nitrogen rate effects on soil properties. Soil Tillage Res 151:61–66

    Article  Google Scholar 

  • Wang JY, Zhang M, Xiong ZQ, Liu PL, Pan GX (2011) Effects of biochar addition on N2O and CO2 emissions from two paddy soils. Biol Fertil Soils 47:887–896

    Article  CAS  Google Scholar 

  • Wang ZL, Li YF, Chang SX, Zhang JJ, Jiang PK, Zhou GM, Shen ZM (2014) Contrasting effects of bamboo leaf and its biochar on soil CO2 efflux and labile organic carbon in an intensively managed Chinese chestnut plantation. Biol Fertil Soils 50:1109–1119

    Article  CAS  Google Scholar 

  • Wang ZQ, Guo SL, Sun QQ, Li NN, Jiang JS, Wang R, Zhang YJ, Liu QF, Wu DF, Li RJ (2015a) Soil organic carbon sequestration potential of artificial and natural vegetation in the hilly regions of Loess Plateau. Ecol Eng 82:547–554

    Article  Google Scholar 

  • Wang XJ, Jia ZK, Liang LY, Yang BP, Ding RX, Nie JF, Wang JP (2015b) Maize straw effects on soil aggregation and other properties in arid land. Soil Till Res 153:131–136

    Article  Google Scholar 

  • Wang XB, Song DL, Liang GQ, Zhang Q, Ai C, Zhou W (2015c) Maize biochar addition rate influences soil enzyme activity and microbial community composition in a fluvo-aquic soil. Appl Soil Ecol 96:265–272

    Article  Google Scholar 

  • Wang JY, Xiong ZQ, Kuzyakov Y (2016) Biochar stability in soil: meta-analysis of decomposition and priming effects. GCB Bioenergy 8:512–523

    Article  CAS  Google Scholar 

  • Wardle DA, Nilsson MC, Zackrisson O (2008) Fire-derived charcoal causes loss of forest humus. Science 320:629–629

    Article  CAS  Google Scholar 

  • Wei T, Zhang P, Wang K, Ding RX, Yang BP, Nie JF, Jia ZK, Han QF (2015) Effects of wheat straw incorporation on the availability of soil nutrents and enzyme activities in semiarid areas. PLoS One 10:e0120994

    Article  Google Scholar 

  • Wu FP, Jia ZK, Wang SG, Chang XS, Startsev A (2013) Contrasting effects of wheat straw and its biochar on greenhouse gas emissions and enzyme activities in a Chernozemic soil. Biol Fertil Soils 49:555–565

    Article  CAS  Google Scholar 

  • Xu JM, Tang C, Chen ZL (2006) Chemical composition controls residue decomposition in soils differing in initial pH. Soil Biol Biochem 38:544–552

    Article  CAS  Google Scholar 

  • Xu MX, Li Q, Wilson G (2016) Degradation of soil physicochemical quality by ephemeral gully erosion on sloping cropland of the hilly Loess Plateau, China. Soil Tillage Res 155:9–18

    Article  Google Scholar 

  • Yuan JH, Xu RK, Qian W (2011) Comparison of the ameliorating effects on an acidic ultisol between four crop straws and their biochars. J Soils Sediments 11:741–750

    Article  CAS  Google Scholar 

  • Zhang K, Dang H, Tan S, Cheng X, Zhang Q (2010a) Change in soil organic carbon following the ‘Grain-for-Green’ programme in China. Land Degradation& Development 21:13–23

    Article  Google Scholar 

  • Zhang AF, Cui LQ, Pan GX, Li LQ, Hussain Q, Zhang XH, Zheng JW, Crowley D (2010b) Effect of biochar amendment on yield and methane and nitrous oxide emissions from a rice paddy from Tai Lake plain, China. Agri Ecosyst Environ 139:469–475

    Article  CAS  Google Scholar 

  • Zhang AF, Bian RJ, Hussain Q, Li LQ, Pan GX, Zheng JW, Zhang XH, Zheng JF (2013) Change in net global warming potential of a rice–wheat cropping system with biochar soil amendment in a rice paddy from China. Agri Ecosyst Environ 173:37–45

    Article  Google Scholar 

  • Zhang P, Wei T, Jia ZK, Han QF, Ren XL (2014) Soil aggregate and crop yield changes with different rates of straw incorporation in semiarid of northwest China. Geoderma 230-231:41–49

    Article  Google Scholar 

  • Zhao LB, Jiang Y (1986) Discussion on measurements of soil phosphates. Chi J Soil Sci 17:138–141

    CAS  Google Scholar 

  • Zheng JF, Chen JH, Pan GX, Liu XY, Zhang XH, Li LQ, Bian RJ, Cheng K, Zheng JW (2016) Biochar decreased microbial metabolic quotient and shifted community composition four years after a single incorporation in a slightly acid rice paddy from Southwest China. Sci Total Environ 571:206–217

    Article  CAS  Google Scholar 

  • Zong YT, Xiao Q, Lu SG (2015) Acidity, water retention, and mechanical physical quality of a strongly acidic ultisol amended with biochars derived from different feedstocks. J Soils Sediments 16:177–190

    Article  Google Scholar 

Download references

Acknowledgements

This work was supported by the National Natural Science Foundation of China (41301305, 41471222, 41601321), the National 863 Research Program (2013AA102904), Technology Co-innovation Projects in Shaanxi Province (2016KTZDNY03-06), the NWAFU Research Project (Z111021302, Z109021614), and the Chinese Universities Scientific Fund (2014YB062, 2452015355).

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Afeng Zhang.

Additional information

Responsible editor: Hailong Wang

Electronic supplementary material

Fig S1.

Correlation between mean weight diameter (MWD) and the content of >0.25 mm water-stable soil aggregates (a); Correlation between MWD and high labile organic C (HLOC), low labile organic C (LLOC) and soil organic carbon (SOC) (b). (PDF 51 kb)

Fig S2

Principal component analysis (PCA) based on FTIR spectra of the different treatments in all various aggregate fractions. 1, 2, 3 and 4 represent >2 mm, 1–2 mm, 0.25–1 mm and <0.25 mm soil aggregates fraction, respectively. (PDF 29 kb)

Table S1

(DOCX 15 kb)

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Zhang, M., Cheng, G., Feng, H. et al. Effects of straw and biochar amendments on aggregate stability, soil organic carbon, and enzyme activities in the Loess Plateau, China. Environ Sci Pollut Res 24, 10108–10120 (2017). https://doi.org/10.1007/s11356-017-8505-8

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s11356-017-8505-8

Keywords

Navigation