Effect of different nitrogen supply on Fraxinus mandshurica seedling's biomass,N partitioning and their seasonal variation

Abstract

Abstract: Nitrogen is one of the most important limiting nutrients for tree growth in temperature forest ecosystems.In this paper,the effects of nitrogen treatments on nitrogen partition and biomass allocation in roots and leaves of one-year-old Fraxinus mandshurica seedlings were studied during a five-month period.The plants were sand-cultured in pots supplied with various concentrations of N (1,4,8,16 mmol稬^-1).The results suggested that N supply could significantly increase the N concentration in roots and leaves.In the initial (June) and middle growth stage (July and August),the N concentration in leaves was over 9.40,9.55 and 4.21 mg穏^-1 respectively,which was higher than that in roots,but in the latter growth stage (September),it was lower than that in roots.From June to September,the N content of whole plant increased markedly,and was 4 times more in September than in June.The N content in Ash seedlings varied with N supply.It increased by 5.5 times in 16 mmol稬^-1 N treatment,in comparing with 1 mmol稬^-1 N treatment in September.The N allocation also varied in leaf,stem,and root.The proportion of N allocation in leaf was the highest in June (43% in average),and the lowest in September (9% in average).The proportion of N allocation to root increased with plant growth,which was the highest in September (81% in average).Regardless N treatments and tree growth stages,the proportion of N allocation to root was the highest,followed by to leaf,and the lowest was to stem.These results provided the theoretical foundation for the further studies of nitrogen absorption and carbon allocation mechanism in root system of Manchurian ash.

Key words: Fraxinus mandshurica, Root, Leaf, N availability, Biomass allocation

CLC Number:

S718

FAN Zhiqiang, WANG Zhengquan, WU Chu, LI Hongxin . Effect of different nitrogen supply on Fraxinus mandshurica seedling's biomass,N partitioning and their seasonal variation[J]. Chinese Journal of Applied Ecology, 2004, (9): 1497-1501.

References

[1] Adamas MB, Campbell RG, Allen HL, et al. 1987. Root and foliar nutrient concentrations in loblolly pine: Effects of season, site and fertilization. For Sci, 33: 984 ～ 996
[2] Andrews K, Sppent JI, Raven JA, et al. 1999. Relationships between shoot to root ratio, growth and leaf soluble protein concentration of Pisum sativum,Phaseolus vulgaris and Triticum aestivum under different nutrient deficiencies. Plant Cell Environ,22:949～958
[3] Burton AJ, Pregitzer KS, Hendrick RL. 2000. Relationships between fine root dynamics and nitrogen availability in Michigan northern hardwood forests. Oecologia, 125: 389～ 399
[4] Burton AJ, Pregitzer KS, Zogg GP, et al. 1996. Latitudinal variation in sugar maple fine root respiration. Can J For Res, 26:1761 ～1768
[5] Chapin FS Ⅲ, Vitousek PM, Van Cleve K. 1987. Plant response to multiple environmental factors. BioScience, 37: 49 ～ 57
[6] Chapin FS, Matson PA, Mooney HA. 2002. Principles of Terrestrial Ecosystem Ecology. New York:Springer-Verlag Inc.
[7] Chen X(陈欣),Yu W-T(宇万太),Zhang L(张璐),et al.1995. Comparative study on internal and external nutrient cyclings of poplar tree under different fertilization Ⅱ. Effect of fertilization on concentration and storage of major nutrients in poplar leaves before and after leaf fallen. Chin J Appl Ecol(应用生态学报),6(4):346～348(in Chinese)
[8] Cumming JR, Brown SM. 1994. Effects of elevated nitrate and aluminium on the growth and nutrition of red spruce(Picea rubens)seedlings. Tree Ph ysiol, 14:589～599
[9] Eissenstat DM, Yanai RD. 1997. The ecology of root lifespan. Adv Ecol Res, 27:1 ～ 60
[10] Ericsson T. 1995. Growth and shoot: Root ration of sesdlings in relation to nutrient availability. Plant Soil, 168～169:205～214
[11] Evans JR. 1989. Photosynthesis and nitrogen relationship in leaves of C3 plants. Oecologia, 78: 9～ 19
[12] Farrar JF, Jones DL. 2000. The control of carbon acquisition by roots. New Phytol, 147:43～53
[13] Field C, Mooney HA. 1986. The photosynthesis-nitrogen relationship in wild plants. In: Givinish TJ ed. On the Economy of Plant Form and Function. Cambridge: Cambridge University Press. 25 ～55
[14] Hendricks JJ, Nadelhoffer KJ, Aber JD. 1993. Assessing the role of fine roots in carbon and nutrient cycling. Trends Ecol Evol, 8:174～ 178
[15] Hikosaka K, Hirose T. 2001. Nitrogen uptake and use by competing individuals in a Xanthium canadense stand. Oecologia, 126:174～181
[16] Hogberg P, Hogbom L and Schinkel H. 1998. Nitrogen related root variables of trees along an N deposition gradient in Europe. Tree Physiol, 18:823 ～828
[17] Huttl RF. 1990. Nutrient supply and fertilizer experiments in view of N saturation. Plant Soil, 128:45 ～ 58
[18] Jarkko U, Toini H. 2001. Influence of nitrogen and phosphorus availability and ozone stress on Norway spruce seedlings. Tree Physiol, 21:447～456
[19] King JS, Albaugh TJ, Allen HL, et al. 2002. Seasonal dynamics of fine roots relative to foliage and stem growth in loblolly pine(Pinus taeda L.) as affected by water and nutrient availability. New Phytol, 154:389～398
[20] Livonen S, Rikala R, Vapaavuori E. 2001. Seasonal root growth of Scots pine seedlings in relation to shoot phenology, Carbohydrate status and nutrient supply. Can J For Res, 31:1569～ 1578
[21] Marschner H, Kirkby EA and Engels C. 1997. Importance of cycling and recycling of mineral nutrients within plants for growth and development. Bot Acta, 110:265～ 273
[22] Murthy R, Dougherty PM, Zarnoch SJ, et al. 1996. Effects of carbon dioxide fertilization, and irrigation on photosynthetic capacity of loblolly pine trees. Tree Physiol, 16:537～546
[23] Nadelhoffer KJ. 2000. Potential effects of nitrogen deposition on fine-root production in forest ecosystems. New Phytol, 147: 131 ～139
[24] Ostertag R. 2001. Effects of nitrogen and phosphorus availability on fine-root dynamics in Hawaiian montane forests. Ecology, 82:485～499
[25] Reich PB, Grigal DF, Aber JD, et al. 1997. Nitrogen mineralization and productivity in 50 hardwood and conifer stands on diverse soils.Ecology, 78: 335 ～ 347
[26] Seith B, George E, Marschner H, et al. 1996. Effects of varied soil nitrogen supply on Norway spruce(Picea abies L. Karst.) I. Shoot and root growth and nutrient uptake. Plant Soil, 184:291～ 298
[27] Shen S-M(沈善敏),Yu W-T(宇万太),Zhang L(张璐),et al.1992. Internal and external nutrient cyclings of poplar tree I.Changes of nutrient storage in different parts of poplar tree before and after leaf fallen. Chin J Appl Ecol(应用生态学报),3(4):296～301(in Chinese)
[28] Shen S-M(沈善敏),Yu W-T(宇万太),Zhang L(张璐),et al.1993. Internal and external nutrient cyclings of poplar tree Ⅱ.Transferring and cycling of nutrients in and out of the trees before and after leaf fallen. Chin J Appl Ecol(应用生态学报),4(1):27～ 31 (in Chinese)
[29] SunX-L(孙雪利),Liu J-S(刘景双),ChuY-R(褚衍儒).2000.Nitrogen dynamics in different organs of Calamagrostis angustifolia and Carex lasiocarpa in Sanjiang Plain. Chin J Appl Ecol (应用生态学报),11(6):893～897.(in Chinese)
[30] Xue L(薛立),Luo S(罗山),TangT-Y(谭天泳).2003.Seasonal changes of nitrogen and phosphorus and their translocation from leaves of ten tree species in central Japan. Chin J Appl Ecol (应用生态学报),14(6):875 878(in Chinese)
[31] Yu W-T(宇万太),Chen X(陈欣),Zhang L(张璐),et al.1995. Comparative study on internal and external nutrient cyclings of poplar tree under different fertilization I. Effect of fertilization on biomass of poplar tree and its internal and external cycling of N before and after leaf fallen. Chin J Appl Ecol(应用生态学报),6(4):341～345(in Chinese)
[32] Zhang Y-D(张彦东),Bai S-B(白尚斌).2003.Effects of nitrogen forms on nutrient observation and growth of trees. Chin J Appl Ecol(应用生态学报),14(11):1695～1672(in Chinese)