Chinese Journal of Plant Ecology (植物生态学报) 2012/36:6 PP.530-538
Aims Land use change may alter nitrogen (N) dynamics in terrestrial ecosystems, but its effects remain poorly quantified. Due to reorganization of the land use by government, a large cultivated area has converted to wood-land and shrubland plantation since the 1980’s in Danjiangkou Reservoir area, China. Our objective was to inves-tigate effects of agricultural land use change on soil N dynamics in this area. Methods We conducted in situ close-top tube incubation experiment to determine soil inorganic N (NH4+-N, NO3–-N), soil net nitrogen minerali-zation and nitrification in three adjacent land use types (afforestation, shrubland and cropland) in the Qingtang river basin around Danjiangkou Reservoir in Spring of 2011. Important findings Soil NO3–-N concentration (mg·kg–1) was 1.27 ± 0.18, 3.51 ± 0.11 and 9.00 ± 0.73 in afforestation, shrubland and cropland, respectively. Soil NO3–-N concentration significantly increased from afforestation to shrubland to cropland, whereas NH4+-N con-centration (mg·kg–1) was not significantly different among afforestation (1.33 ± 0.20), shrubland (1.67 ± 0.17) and cropland (1.62 ± 0.13). We found that NO3–-N was the main form of inorganic N under shrubland and cropland, and the proportion of NO3–-N to soil inorganic N content was 67.8% and 84.8% in shrubland and cropland, respec-tively; however, the concentration of NO3–-N was approximately equal to NH4+-N under afforestation. Soil net N mineralization rate (mg·kg–1·30 d–1) were 0.98 ± 0.12, 2.52 ± 1.25 and 6.58 ± 2.29, respectively in afforestation, shrubland to cropland. Soil net N mineralization rate was not significantly different among the land use types, whereas nitrification rate (mg·kg–1·30 d–1) was significantly different: cropland (7.13 ± 2.19), shrubland (2.56 ± 1.07) and afforestation (0.85 ± 0.10). Soil net N mineralization rate was positively correlated with nitrification rate. Nitrification rate accounts for approximately 87% of soil mineralization rate in afforestation, whereas nitrifi-cation was higher than mineralization rate in shrubland and cropland soil due to the ammonification rate being be-low zero. Both soil N mineralization and nitrification were regulated by soil water content and soil temperature with more sensitive to soil water content during the incubation period. Additionally, soil N mineralization and ni-trification were negatively correlated with soil C:N ratio. Our results suggest that change in soil microclimate and soil C:N ratio under land use change would impact soil N dynamics.
Adams MA, Attiwill PM (1986). Nutrient cycling and nitrogen mineralization in eucalypt forests of southeastern Australia II. Indexes of nitrogen mineralization. Plant and Soil, 92, 341-362.
Beck T, Joergensen RG, Kandeler E, Makeschin F, Nuss E, Oberholzer HR, Scheu S (1997). An inter-laboratory comparison of ten different ways of measuring soil microbial biomass C. Soil Biology & Biochemistry, 29, 1023-1032.
Binkley D, Hart SC (1989). The components of nitrogen availability assessments in forest soils. Advances in Soil Science, 10, 57-112.
Booth MS, Stark JM, Rastetter E (2005). Controls on nitrogen cycling in terrestrial ecosystems: a synthetic analysis of literature data. Ecological Monographs, 75, 139-157.
Bregliani MM, Ros GH, Temminghoff EJM, van Riemsdijk WH (2010). Nitrogen mineralization in soils related to initial extractable organic nitrogen: effect of temperature and time. Communications in Soil Science and Plant Analysis, 41, 1383-1398.
Brookes PC, Landman A, Pruden G, Jenkinson DS (1985). Chloroform fumigation and the release of soil nitrogen: a rapid direct extraction method to measure microbial biomass nitrogen in soil. Soil Biology & Biochemistry, 17, 837-842.
Chapin FS III, Matson PA, Mooney HA (2002). Principles of Terrestrial Ecosystem Ecology. Springer-Verlag, New York.
Dalias P, Anderson JM, Bottner P, Coûteaux MM (2002). Temperature responses of net nitrogen mineralization and nitrification in conifer forest soils incubated under standard laboratory conditions. Soil Biology & Biochemistry, 34, 691-701.
de Boer W, Kowalchuk GA (2001). Nitrification in acid soils: micro-organisms and mechanisms. Soil Biology & Biochemistry, 33, 853-866.
Elser JJ, Bracken MES, Cleland EE, Gruner DS, Harpole WS, Hillebrand H, Ngai JT, Seabloom EW, Shurin JB, Smith JE (2007). Global analysis of nitrogen and phosphorus limitation of primary producers in freshwater, marine and terrestrial ecosystems. Ecology Letters, 10, 1135-1142.
Fu MJ (傅民杰), Wang CK (王传宽), Wang Y (王颖), Liu S (刘实) (2009). Temporal and spatial patterns of soil nitrogen mineralization and nitrification in four temperate forests. Acta Ecologica Sinica (生态学报), 29, 3747-3758. (in Chinese with English abstract)
Grenon F, Bradley RL, Titus BD (2004). Temperature sensitivity of mineral N transformation rates, and heterotrophic nitrification: possible factors controlling the post-disturbance mineral N flush in forest floors. Soil Biology & Biochemistry, 36, 1465-1474.
Guntiñas M, Leirós MC, Trasar-Cepeda C, Gil-Sotres F (2011). Effects of moisture and temperature on net soil nitrogen mineralization: a laboratory study. European Journal of Soil Biology, 48, 73-80.
Knoepp JD, Swank WT (1998). Rates of nitrogen mineralization across an elevation and vegetation gradient in the southern Appalachians. Plant and Soil, 204, 235-241.
Knoepp JD, Swank WT (2002). Using soil temperature and moisture to predict forest soil nitrogen mineralization. Biology and Fertility of Soils, 36, 177-182.
Li SY, Cheng XL, Xu ZF, Han HY, Zhang QF (2009). Spatial and temporal patterns of the water quality in the Danjiangkou Reservoir, China. Hydrological Sciences Journal, 54, 124-134.
Liu GS (刘光崧), Jiang NH (蒋能慧), Zhang LD (张连弟), Liu ZL (刘兆礼) (1996). Soil Physical and Chemical Analysis and Description of Soil Profile (土壤理化分析与剖面描述). Standards Press of China, Beijing. 34-35. (in Chinese)
Liu WZ, Liu GH, Li SY, Zhang QF (2010). Phosphorus sorption and desorption characteristics of wetland soils from a subtropical reservoir. Marine and Freshwater Research, 61, 507-512.
Lovett GM, Weathers KC, Arthur MA, Schultz JC (2004). Nitrogen cycling in a northern hardwood forest: do species matter? Biogeochemistry, 67, 289-308.
Meng Y (孟盈), Xue JY (薛敬意), Sha LQ (沙丽清), Tang JW (唐建维) (2001). Variations of soil NH4+-N, NO3--N and N mineralization under different forests in Xishuangbanna, southwest China. Acta Phytoecologica Sinica (植物生态学报), 25, 99-104. (in Chinese with English abstract)
Mikan CJ, Schimel JP, Doyle AP (2002). Temperature controls of microbial respiration in arctic tundra soils above and below freezing. Soil Biology & Biochemistry, 34, 1785-1795.
Quideau SA, Chadwick OA, Benesi A, Graham RC, Anderson MA (2001). A direct link between forest vegetation type and soil organic matter composition. Geoderma, 104, 41-60.
Rabalais NN (2002). Nitrogen in aquatic ecosystems. AMBIO, 31, 102-112.
Raison RJ, Connell MJ, Khanna PK (1987). Methodology for studying fluxes of soil mineral-N in-situ. Soil Biology & Biochemistry, 19, 521-530.
Ross DS, Lawrence GB, Fredriksen G (2004). Mineralization and nitrification patterns at eight northeastern USA forested research sites. Forest Ecology and Management, 188, 317-335.
Sierra J (1997). Temperature and soil moisture dependence of N mineralization in intact soil cores. Soil Biology & Biochemistry, 29, 1557-1563.
State Forestry Administration (国家林业局) (1999). LY/T1230-1999 Forestry Industry Standards of the People’s Republic of China (中华人民共和国林业行业标准). Standards Press of China, Beijing. 81-83. (in Chinese)
Ste-Marie C, Paré D (1999). Soil, pH and N availability effects on net nitrification in the forest floors of a range of boreal forest stands. Soil Biology & Biochemistry, 31, 1579-1589.
Sun ZG (孙志高), Liu JS (刘景双), Li XH (李新华) (2008). Changes of nitrogen storage in soil under different land uses in the Sanjiang Plain. System Sciences and Comprehensive Studies in Agriculture (农业系统科学与综合研究), 24, 270-274. (in Chinese with English abstract)
Templer PH, Groffman PM, Flecker AS, Power AG (2005). Land use change and soil nutrient transformations in the Los Haitises region of the Dominican Republic. Soil Biology & Biochemistry, 37, 215-225.
Uri V, Lõhmus K, Kund M, Tullus H (2008). The effect of land use type on net nitrogen mineralization on abandoned agricultural land: silver birch stand versus grassland. Forest Ecology and Management, 255, 226-233.
Usman S, Singh SP, Rawat YS (2000). Nitrification mineralisation and inorganic-N uptake in evergreen forests of the central Himalayas. European Journal of Soil Biology, 36, 65-71.
Verchot LV, Holmes Z, Mulon L, Groffman PM, Lovett GM (2001). Gross vs net rates of N mineralization and nitrification as indicators of functional differences between forest types. Soil Biology & Biochemistry, 33, 1889-1901.
Vitousek PM, Aber JD, Howarth RW, Likens GE, Matson PA, Schindler DW, Schlesinger WH, Tilman DG (1997). Human alteration of the global nitrogen cycle: sources and consequences. Ecological Applications, 7, 737-750.
Vitousek PM, Howarth RW (1991). Nitrogen limitation on land and in the sea: How can it occur? Biogeo- chemistry, 13, 87-115.
Wang CH, Wan SQ, Xing XR, Zhang L, Han XG (2006). Temperature and soil moisture interactively affected soil net N mineralization in temperate grassland in Northern China. Soil Biology & Biochemistry, 38, 1101-1110.
Wang CH (王常慧), Xing XR (邢雪荣), Han XG (韩兴国) (2004). The effects of temperature and moisture on the soil net nitrogen mineralization in an Aneulolepidium chinensis grassland, Inner Mongolia, China. Acta Ecologica Sinica (生态学报), 24, 2472-2476. (in Chinese with English abstract)
Wei XR, Shao MG, Fu XL, Ågren GI, Yin XQ (2011). The effects of land use on soil N mineralization during the growing season on the northern Loess Plateau of China. Geoderma, 160, 590-598.
Wu JS (吴金水), Lin QM (林启美), Huang QY (黄巧云), Xiao HA (肖和艾) (2006). Soil Microbial Biomass- Methods and Applications (土壤微生物生物量测定方法及其应用). China Meteorological Press, Beijing. (in Chinese)
Yan ER, Wang XH, Huang JJ, Li GY, Zhou W (2008). Decline of soil nitrogen mineralization and nitrification during forest conversion of evergreen broad-leaved forest to plantations in the subtropical area of Eastern China. Biogeochemistry, 89, 239-251.
Yu L (余泺), Gao M (高明), Ci E (慈恩), Wang ZF (王子芳), Wei CF (魏朝富), Xu C (徐畅) (2010). Study on the characteristics of mineralization and nitrification in different cultivation modes. Ecology and Environ- mental Sciences (生态环境学报), 19, 733-738. (in Chinese with English abstract)
Zhang M (张敏), Zou XM (邹晓明) (2009). Comparison of soil C and N in rubber plantation and seasonal rain forest. Chinese Journal of Applied Ecology (应用生态学报), 20, 1013-1019. (in Chinese with English abstract)
Zhang QF, Xu ZF, Shen ZH, Li SY, Wang SS (2009). The Han River watershed management initiative for the South-to-North Water Transfer project (Middle Route) of China. Environmental Monitoring and Assessment, 148, 369-377.
Zhang XL, Wang QB, Li LH, Han XG (2008). Seasonal variations in nitrogen mineralization under three land use types in a grassland landscape. Acta Oecologica, 34, 322-330.
Zhou CP (周才平), Ouyang H (欧阳华) (2001). Temperature and moisture effects on soil nitrogen mineralization in deciduous broad-leaved forest. Acta Phytoecologica Sinica (植物生态学报), 25, 204-209. (in Chinese with English abstract)
Zhu MM (朱明勇), Tan SD (谭淑端), Gu S (顾胜), Zhang QF (张全发) (2010). Characteristics of soil erodibility in the Danjiangkou Reservoir region, Hubei Province. Chinese Journal of Soil Science (土壤通报), 41, 434-436. (in Chinese with English abstract)