Abstract
Soil labile fractions play an important role in improving soil quality due to its ability of maintaining soil fertility and minimizing negative environmental impacts. The objective of this study was to evaluate the effects of forest transition (conversion of natural broadleaf forests into monoculture tree plantations) on soil labile fractions (light fraction organic carbon, particulate organic carbon, and microbial biomass carbon). Soil samples were collected from a natural forest of Castanopsis kawakamii Hayata (NF) and two adjacent 36-year-old monoculture plantations of C. kawakamii (CK) and Cunninghamia lanceolata Lamb. (Chinese fir) (CF) at Xinkou Experimental Forestry Centre, southeastern China. In the 0–100 cm depth, the light fraction organic carbon (LFOC), particulate organic carbon (POC) and microbial biomass carbon (MBC) were significantly lower in the CK and CF than in the NF (P < 0.05). Generally, LFOC, POC and MBC contents declined consistently with profile depth. Significant differences in LFOC, POC and MBC concentrations between the native forest and two plantations were detected at 0–40 cm depth, especially the top 10 cm, whereas there was less change below 40 cm, indicating that labile fraction losses due to forest transition mainly occurred in the surface soils. The three indices of labile organic carbon were closely correlated, suggesting they are interrelated properties. Labile fractions (LFOC, POC and MBC) were more sensitive indicators of SOC change resulting from the forest transition. We also found that forest types significantly affected the water stable aggregate >0.25 mm content (WSA) at the 0–10 cm depth. It suggested that converting old-growth native forest to intensively-managed plantations would reduce labile organic C, which may be attributed to a combination of factors including quantity of litter materials, microbial activity and management disturbances, which would change greatly with the forest conversion. How long these changes would persist needs the further study.
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References
Anderson TH, Domsch KH (1989) Ratios of microbial biomass carbon to total organic carbon in arable soils. Soil Biol Biochem 21:471–479. doi:10.1016/0038-0717(89)90117-X
Bayer C, Mielniczuk J, Martin-Neto L, Ernani PR (2002) Stocks and humification degree of organic matter fractions as affected by no-tillage on a subtropical soil. Plant Soil 238:133–140. doi:10.1023/A:1014284329618
Boone RD (1994) Light-fraction soil organic matter: origin and contribution to net nitrogen mineralization. Soil Biol Biochem 26:1459–1468. doi:10.1016/0038-0717(94)90085-X
Cambardella CA, Elliot ET (1992) Particulate soil organic-matter changes across a grassland cultivation sequence. Soil Sci Soc Am J 56:777–783
Cambardella CA, Elliot ET (1993) Carbon and nitrogen distribution in aggregates of cultivated and native grassland soils. Soil Sci Soc Am J 57:1071–1076
Campbell MR, Biederbeck VO, McConkey BG (1999) Soil quality-effect of tillage and fallow frequency: soil organic matter quality as influenced by tillage and fallow frequency in a silt loam in southwestern Saskatchewan. Soil Biol Biochem 31:1–7. doi:10.1016/S0038-0717(97)00212-5
Chan KY, Bowman A, Oates A (2001) Oxidizible organic carbon fractions and soil quality changes in an Oxic Paleustalf under different pasture leys. Soil Sci 166:61–67. doi:10.1097/00010694-200101000-00009
Chan KY, Heenan DP, Oates A (2002) Soil carbon fractions and relationship to soil quality under different tillage and stubble management. Soil Tillage Res 63:133–139. doi:10.1016/S0167-1987(01)00239-2
Chen CR, Xu ZH, Mathers NJ (2004a) Soil carbon pools in adjacent natural and plantation forests of subtropical Australia. Soil Sci Soc Am J 68:282–291
Chen GS, Yang YS, Xie JS, Li L, Gao R (2004b) Soil biological changes for a natural forest and two plantations in subtropical China. Pedosphere 14(3):297–304
Chen CR, Xu ZH, Zhang SL, Keay P (2005a) Soluble organic nitrogen pools in forest soils of subtropical Australia. Plant Soil 277:285–297. doi:10.1007/s11104-005-7530-4
Chen GS, Yang YS, Xie JS, Guo JF, Gao R, Qian W (2005b) Conversion of a natural broad-leafed evergreen forest into pure plantation forests in a subtropical area: effects on carbon storage. Ann For Sci 62:659–668. doi:10.1051/forest:2005073
Cromack K Jr, Miller RE, Helgerson OT, Smith RB, Anderson HW (1999) Soil carbon and nutrients in a coastal Oregon Douglas-fir plantation with red alder. Soil Sci Soc Am J 63(1):232–239
Franzluebbers AJ, Arshad MA (1997) Particulate organic carbon content and potential mineralization as affected by tillage and texture. Soil Sci Soc Am J 61:1382–1386
Gale WJ, Cambardella CA, Bailey TB (2000) Root-derived carbon and the formation and stabilization of aggregates. Soil Sci Soc Am J 64:201–207
Golchin A, Oades JM, Skjemstad JO, Clarke P (1994) Study of free and occluded particulate organic matter in soils by solid state 13C CP/MAS NMR spectroscopy and scanning electron microscopy. Aust J Soil Res 32:285–309. doi:10.1071/SR9940285
Gregorich EG, Janzen HH (1996) Storage of soil carbon in the light fraction and macro organic matter. In: Carter MR, Stewart BA (eds) Advances in soil science. Structure and organic matter storage in agricultural soils. CRC Lewis, Boca Raton, pp 167–190
Guo LB, Gifford RM (2002) Soil carbon stocks and land use change: a meta analysis. Glob Change Biol 8:345–360. doi:10.1046/j.1354-1013.2002.00486.x
He Y, Xu ZH, Chen CR, Burton J, Ma Q, Ge Y, Xu JM (2008) Using light fraction and macroaggregate associated organic matters as early indicators for management-induced changes in soil chemical and biological properties in adjacent native and plantation forests of subtropical Australia. Geoderma 147:116–125. doi:10.1016/j.geoderma.2008.08.002
Huang ZQ, Xu ZH, Chen CR, Boyd S (2008) Changes in soil carbon during the establishment of a hardwood plantation in subtropical Australia. For Ecol Manage 254:46–55
Insam H, Parkinson D, Domsch KH (1989) Influence of macroclimate on soil microbial biomass. Soil Biol Biochem 21:211–221. doi:10.1016/0038-0717(89)90097-7
Janzen HH, Campbell CA, Brandt SA, Lafond GP, Townley Smith L (1992) Light fraction organic matter in soils from long term crop rotations. Soil Sci Soc Am J 56:1799–1806
Omay AB, Rice CW, Maddux LD, Gordon WB (1997) Changes in soil microbial and chemical properties under long-term crop rotation and fertilization. Soil Sci Soc Am J 61:1672–1678
Post WM, Kwon KC (2000) Soil carbon sequestration and land-use change: processes and potential. Glob Change Biol 6:317–327. doi:10.1046/j.1365-2486.2000.00308.x
Powlson DS, Brookes PC, Christensen BT (1987) Measurement of soil microbial biomass provides an early indication of changes in total soil organic matter due to straw incorporation. Soil Biol Biochem 19:159–164. doi:10.1016/0038-0717(87)90076-9
Reeves DW (1997) The role of soil organic matter in maintaining soil quality in continuous cropping systems. Soil Tillage Res 43:131–167. doi:10.1016/S0167-1987(97)00038-X
Sarkhot DV, Jokela EJ, Comerford NB (2008) Surface soil carbon size–density fractions altered by loblolly pine families and forest management intensity for a Spodosol in the southeastern US. Plant Soil 307:99–111. doi:10.1007/s11104-008-9587-3
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. doi:10.1023/A:1016125726789
Sparling GP (1992) Ratio of microbial biomass carbon to soil organic carbon as a sensitive indicator of changes in soil organic matter. Aust J Soil Res 30:195–207. doi:10.1071/SR9920195
SPSS Inc (2004) SPSS 13.0. SPSS Inc., Chicago
Tisdall JM, Oades JM (1982) Organic matter and water stable aggregates in soil. J Soil Sci 33:141–163. doi:10.1111/j.1365-2389.1982.tb01755.x
Turchenek LW, Oades JM (1979) Fractionation of organo-mineral complexes by sedimentation and density techniques. Geoderma 21:311–343. doi:10.1016/0016-7061(79)90005-3
Vance ED, Brookes PC, Jenkinson DS (1987) An extraction method for measuring soil microbial biomass C. Soil Biol Biochem 19:703–707. doi:10.1016/0038-0717(87)90052-6
Von Lutzow M, Leifeld J, Kainz M, Kogel-Knabner I, Munch JC (2000) Indications for soil organic matter quality in soils under different management. Geoderma 105:243–258. doi:10.1016/S0016-7061(01)00106-9
Wander MM, Yang Z (2000) Influence of tillage on the dynamics of loose- and occluded-particulate and humified organic matter fractions. Soil Biol Biochem 32:1551–1560. doi:10.1016/S0038-0717(00)00031-6
Wu JG, Zhang XQ, Wang YH, Xu DY (2002) The effects of land use changes on the distribution of soil organic carbon in physical fractionation of soil. Scientia Silvae Sinicae 38(4):19–29. In Chinese with English abstract
Xu ZH, Ward S, Chen CR, Blumfield T, Prasolova N, Liu JX (2008) Soil carbon and nutrient pools, microbial properties and gross nitrogen transformations in adjacent natural forest and hoop pine plantations of subtropical Australia. J Soils Sediments 8:99–105. doi:10.1065/jss2008.02.276
Yang YS (1998) Studies on the sustainable management of Chinese fir plantations. China Forestry Press, Beijing, pp 118–126. In Chinese
Yang YS, Li ZW, Liu AQ (1993) Studies on soil fertility for natural forest of Castanopsis kawakamii replaced by broadleaf plantation. J Northeast For Univ 21(5):14–21. In Chinese with English abstract
Yang YS, Chen GS, Lin P, Xie JS, Guo JF (2004a) Fine root distribution, seasonal pattern and production in four plantations compared with a natural forest in subtropical China. Ann For Sci 61:617–627. doi:10.1051/forest:2004062
Yang YS, Guo JF, Chen GS, Lin RY, Cai LP, Lin P (2004b) Litterfall, nutrient return, and leaf-litter decomposition in four plantations compared with a natural forest in subtropical China. Ann For Sci 61:465–476 doi:10.1051/forest:2004040
Yang YS, Guo JF, Chen GS, Xie JS, Gao R, Li Z, Jin Z (2005) Carbon and nitrogen pools in Chinese fir and evergreen broadleaved forests and changes associated with felling and burning in mid-subtropical China. For Ecol Manage 216(1–3):216–226
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This research was funded by the Ministry of Education of China through the Supporting Program for University Key Teacher and by the Key Basic Research Project of Fujian Province (2000F004).
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Yang, Y., Guo, J., Chen, G. et al. Effects of forest conversion on soil labile organic carbon fractions and aggregate stability in subtropical China. Plant Soil 323, 153–162 (2009). https://doi.org/10.1007/s11104-009-9921-4
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DOI: https://doi.org/10.1007/s11104-009-9921-4