Abstract
Given the same amount of irrigation volume, applying alternate partial root-zone irrigation (PRI) has improved crop N nutrition as compared to deficit irrigation (DI), yet the mechanisms underlying this effect remain unknown. Therefore, the objective of this study was to investigate whether PRI induced soil dry/wet cycles facilitate soil organic N mineralization hereby contributing to the improvement of N nutrition in tomatoes. The plants were grown in split-root pots in a climate-controlled glasshouse and were subjected to PRI and DI treatments during early fruiting stage. 15N-labeled maize residues were incorporated into the soils. Results showed that PRI resulted in 25% higher net 15N mineralization than did DI, indicating that the enhanced mineralization of soil organic N alone could account for the 16% increase of N accumulation in the PRI than in the DI plants. The higher net N mineralization under PRI was coincided with an intensified soil microbial activity. In addition, even though soil chloroform fumigation labile carbon (CFL-C, as an index of microbial biomass) was similar for the two irrigation treatments, a significant increase of chloroform fumigation labile nitrogen (CFL-N) was found in the PRI wetting soil. Consequently, the C:N ratio of the chloroform fumigation labile pool was remarkably modified by the PRI treatment, which might indicate physiological changes of soil microbes or changes in labiality of soil organic C and N due to the dry/wet cycles of soils, altering conditions for net N mineralization. Moreover, in both soil compartments PRI caused significantly less extractable organic carbon (EOC) as compared with DI; whilst in the PRI wetting soil significantly higher extractable organic nitrogen (EON) was observed. A low EOC:EON ratio in the PRI wetting soil may indicate an increasing net mineralization of the organic N as a result of microbial metabolism. Conclusively, PRI induced greater microbial activity and higher microbial substrates availability are seemingly responsible for the enhanced net N mineralization and improved N nutrition in tomato plants.







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Austin AT, Yahdjian L, Stark JM, Belnap J, Porporato A, Norton U, Ravetta DA, Schaeffer SM (2004) Water pulses and biogeochemical cycles in arid and semiarid ecosystems. Oecologia 141:221–235
Birch HF (1958) The effect of soil drying on humus decomposition and nitrogen availability. Plant Soil 10:9–31
Borken W, Matzner E (2009) Reappraisal of drying and wetting effects on C and N mineralization and fluxes in soils. Glob Chang Biol 15:808–824
Brooks PD, Stark JM, McInteer BB, Preston T (1989) Diffusion method to prepare soil extracts for automated nitrogen-15 analysis. Soil Sci Soc Am J 53:1707–1711
Butterly CR, Bünemann EK, McNeill AM, Marschner P (2009) Carbon pulses but not phosphorus pulses are related to decreases in microbial biomass during repeated drying and rewetting of soils. Soil Biol Biochem 41:1406–1416
Dodd IC (2007) Soil moisture heterogeneity during deficit irrigation alters root-to-shoot signaling of abscisic acid. Funct Plant Biol 34:439–448
Dodd IC (2009) Rhizposphere manipulations to maximize ‘crop per drop’ during deficit irrigation. J Exp Bot 60:1–6
English MJ, Raja SJ (1996) Perspectives on deficit irrigation. Agric Water Manage 32:1–14
Fierer N, Schimel JP (2003) A proposed mechanism for the pulse in carbon dioxide production commonly observed following the rapid rewetting of a dry soil. Soil Sci Soc Am J 67:798–805
Hu T, Kang S, Li F, Zhang J (2009) Effects of partial root-zone irrigation on the nitrogen absorption and utilization of maize. Agric Water Manage 96:208–214
IPCC Fourth Assessment Report (2007) Climate Change 2007. United Nations Intergovernmental Panel on Climate Change (IPCC)
Jensen KD, Beier C, Michelsen A, Emmett BA (2003) Effects of experimental drought on microbial processes in two temperate healthlands at contrasting water conditions. Appl Soil Ecol 24:165–176
Joergensen RG, Anderson TH, Wolters V (1995) Carbon and nitrogen relationships in the microbial biomass of soils in beech (Fagus sylvatica L.) forests. Biol Fertil Soils 19:141–147
Jones DL, Shannon D, Murphy DV, Farrar J (2004) Role of dissolved organic nitrogen (DON) in soil N cycling in grassland soils. Soil Biol Biochem 36:749–756
Killham K (1994) Soil ecology. Cambridge University Press, Cambridge, p 260
Kirda C, Topcu S, Kaman H, Ulger AC, Yazici A, Cetin M, Derici MR (2005) Grain yield response and N-fertilizer recovery of maize under deficit irrigation. Field Crops Res 93:132–141
Kirda C, Topcu S, Cetin M, Dasgan HY, Kaman H, Topaloglu F, Derici MR, Ekici B (2007) Prospects of partial root zone irrigation for increasing irrigation water use efficiency of major crops in the Mediterranean region. Ann Appl Biol 150:281–291
Li Z, Zhang F, Kang S (2005) Impacts of the controlled roots divided alternative irrigation on water and nutrient use of winter wheat. Transactions of Chinese Society of Agricultural Engineering 21:17–21
Liu FL, Shahnazari A, Andersen MN, Jacobsen SE, Jensen CR (2006) Physiological responses of potato (Solanum tuberosum L.) to partial root-zone drying: ABA signaling, leaf gas exchange, and water use efficiency. J Exp Bot 57:3727–3735
Liu FL, Andersen MN, Jensen CR (2009) Capability of the ‘Ball-Berry’ model for predicting stomatal conductance and water use efficiency of potato leaves under different irrigation regimes. Sci Hortic 122:346–354
Lundquist EJ, Scow KM, Jackson LE, Uesugi SL, Johnson CR (1999) Rapid response of soil microbial communities from conventional, low input, and organic farming systems to a wet/dry cycle. Soil Biol Biochem 31:1661–1675
Magid J, Kjærgaard C, Gorissen A, Kuikman PJ (1999) Drying and rewetting of a loamy sand soil did not increase the turnover of native organic matter, but retarded the decomposition of added 14C-labelled plant material. Soil Biol Biochem 31:595–602
Mamilov A, Dilly OM (2002) Soil microbial eco-physiology as affected by short-term variation in environmental conditions. Soil Biol Biochem 34:1283–1290
Mingo DM, Theobald JC, Bacon MA, Davies WJ, Dodd IC (2004) Biomass allocation in tomato (Lycopersicon esculentum) plants grown under partial rootzone drying: enhancement of root growth. Funct Plant Biol 31:971–978
Nannipieri P, Paul E (2009) The chemical and functional characterization of soil N and its biotic components. Soil Biol Biochem 41:2357–2369
Paul EA, Clark FE (1996) Soil microbiology and biochemistry, 3rd edn. Academic, New York
Shahnazari A, Ahmadi SH, Laerke PE, Liu FL, Plauborg F, Jacobsen SE, Jensen CR, Andersen MN (2008) Nitrogen dynamics in the soil-plant system under deficit and partial root-zone drying irrigation strategies in potatoes. Eur J Agron 28:65–73
Sparling GP, Murphy DV, Thompson RB, Fillery IRP (1995) Short-term net N mineralization from plant residues and gross and net N mineralization from soil organic matter after rewetting of a seasonally dry soil. Aust J Soil Res 33:961–973
Stenberg B, Johansson M, Pell M, Sjödahl-svensson K, Stenström J, Torstensson L (1998) Microbial biomass and activities in soil as affected by frozen and cold stroage. Soil Biol Biochem 30:393–402
Vance ED, Brookes PC, Jenkinson DS (1987) An extraction method for measuring soil microbial C. Soil Biol Biochem 19:703–707
van Gestel M, Merckx R, Vlassak K (1993) Microbial biomass responses to soil drying and rewetting: the fate of fast-and slow-growing microorganisms in soils from different climates. Soil Biol Biochem 25:109–123
Wang J, Kang S, Li F, Zhang F, Li Z, Zhang J (2008) Effects of alternate partial root-zone irrigation on soil microorganism and maize growth. Plant Soil 302:45–52
Wang HQ, Liu FL, Andersen MN, Jensen CR (2009) Comparative effects of partial root-zone drying and deficit irrigation on nitrogen uptake in potatoes (Solanum tuberosum L.). Irrig Sci 27:443–448
Wang YS, Liu FL, Andersen MN, Jensen CR (2010) Improved plant nitrogen nutrition contributes to higher water use efficiency in tomatoes under alternate partial root-zone irrigation. Funct Plant Biol 37:175–182
Winter JP, Zhang Z, Tenuta M, Voroney RP (1994) Measurement of microbial biomass by fumigation-extraction in soil stored frozen. Soil Sci Soc Am J 58:1645–1651
WRI (2005) World Resources Institute: Freshwater resources
Xiang SR, Doyle A, Holden PA, Schimel JP (2008) Drying and rewetting effects on C and N mineralization and microbial activity in surface and subsurface California grassland soils. Soil Biol Biochem 40:2281–2289
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Wang, Y., Liu, F., de Neergaard, A. et al. Alternate partial root-zone irrigation induced dry/wet cycles of soils stimulate N mineralization and improve N nutrition in tomatoes. Plant Soil 337, 167–177 (2010). https://doi.org/10.1007/s11104-010-0513-0
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DOI: https://doi.org/10.1007/s11104-010-0513-0


