科尔沁草甸草地放牧和割草条件下土壤种子库研究

摘要/Abstract

摘要： 研究了科尔沁沙地草甸草地在放牧、割草两种利用方式下的土壤种子库的大小、组成及其与地上植被的关系.结果表明,在自由放牧下,土壤种子库密度为6 158±1 647粒·m^-2,在割草利用下,土壤种子库密度为8 312±2 540粒·m^-2.放牧干扰下,种子库组成以矮小、短命的一年生植物为主,其中一二年生植物占81.66%,占比例最大的前4种植物分别为虎尾草(38.55%)、灰绿藜(15.42%)、毛马唐(14.95%)和狗尾草(9.83%),多年生植物种子密度仅为1 129±302粒·m^-2;割草干扰下,一二年生植物占68.08%,其中狗尾草占52.7%;而割草地多年生植物种子密度为2 653±811粒·m^-2.放牧地土壤种子库密度与地上植物相关不显著;割草地土壤种子库密度与地上植物多度显著相关(r=0.76,P<0.01).放牧地种子库的Shannon-Wiener指数、丰富度指数分别为2.96和2.98,明显小于割草地的3.10和5.09,表明自由放牧更易使物种多样性下降.

关键词: 科尔沁沙地, 草甸, 放牧, 割草, 种子库

Abstract: This study on the size and composition of seed bank and its relationship with vegetation showed in Keerqin meadow grassland,the density of soil seed bank was 6 158?1 647 grains穖^-2 under grazing and 8 312?2 540 grains穖^-2 under harvesting.Under grazing,the seed bank was mainly composed of some dwarf and short-life annuals.The seeds of the annuals and biennials accounted for 81.66% of the seeds in seed bank.The four species with largest proportion of seed bank were Chloris virgata,Chenopodium glaucum,Digitaria cilliaris and Setaria viridis,and the proportions were 38.55%,15.42%,14.95%,and 9.83%,respectively.The density of perennials in soil seed bank was 1 129?302 grains穖^-2.Under harvesting,the seeds of annuals and biennials accounted for 68.08% of the seed in seed bank,and the proportion of Setaria viridis was 52.7%.In the harvesting meadow grassland,the seed density of perennials was 2 653?811 grains穖^-2.There was no significant correlation between the seed density in soil and the vegetation under grazing,but a significant correlation between the seed density in soil and the species abundance of vegetation under harvesting (r=0.76,P<0.01).The index of Shannon-Wiener and richness of grazing meadow grassland were 2.96 and 2.98,respectively,distinctly smaller than 3.10 and 5.09 of harvesting meadow,which showed that free grazing made the diversity of seed bank decrease easily.

Key words: Keerqin sandy land, Meadow, Grazing, Harvesting, Seed bank

中图分类号:

Q948.1

蒋德明, 李荣平, 刘志民, 阎巧玲. 科尔沁草甸草地放牧和割草条件下土壤种子库研究[J]. 应用生态学报, 2004, (10): 1860-1864.

JIANG Deming, LI Rongping, LIU Zhimin, YAN Qiaoling. Soil seed bank in Keerqin meadow grassland under grazing and harvesting[J]. Chinese Journal of Applied Ecology, 2004, (10): 1860-1864.

参考文献

[1] An S-Q(安树青),Lin X-Y(林向阳),Hong B-G(洪必恭).1996.A preliminary study on the soil seed bank of the dominant vegetstion forms on Baohua Mountain. Acta Phytoecol Sin(植物生态学报),20(1) :41～50(in Chinese)
[2] Coffin DP, Lauenroth WR. 1989. Spatial and temporal variation in the seed bank of a semiarid grassland. Ame J Bot, 76 (1): 53 ～ 58
[3] Deng Z-F(邓自发), Zhou X-M(周兴民), Wang Q-J(王启基).1997. The studies of seed bank of Kobresia huilis meadow in Qingzang Plateau. Chin J Ecol(生态学杂志), 16(5): 19 ～ 23(in Chinese)
[4] Guo QF, Rundel PW, Goodall DW. 1998. Horizontal and vertical distribution of desert seed banks: patterns, causes, and implications.J Arid Environ, 38: 465 ～ 478
[5] Han Y-Z(韩有志), Wang Z-Q(王政权). 2003. Quantification comparison of spatial pattern of soil seed bank of Fraxinus mandshurica in two stands. Chin J Appl Ecol ( 应用生态学报 ), 14(4):487～ 492 (in Chinese)
[6] How CD, Chancellor RJ. 1983. Factors affecting the viable seed content of soils beneath lowland pastures. J Appl Ecol, 20:915 ～922
[7] Johnson RG, Anderson RC. 1986. The seed bank of a tall-grasa prairie in Illinois. American Midland Naturalist, 115:1223～ 1230
[8] Johnston A, Smoliak S, Stringer PW. 1969. Viable seed populations in prairie topsoils. Can J Plant Sci, 49:75～82
[9] Kelt DA & Valone TJ. 1995. Effects of grazing on the abundance and diversity of annual plants in Chihuahuan desert scrub habitat.Oecologia, 103:191 ～ 195
[10] Liu Z-M(刘志民), Li X-H(李雪华), Li R-P(李荣平), et al.2003. A comparative study on seed shape of 70 species in Keerqin sandy land. Acta Pratacul Sin (草业学报), 12(5) :55～61
[11] Ma W-L(马万里),Jing T(荆涛),Joni K, et al. 2001. The dynamics of seed rain and seed bank of Juglans mandshurica population in Changbai Mountain. J Beijing For Univ(北京林业大学学报), 23(3) :70～72(in Chinese)
[12] O'Connor TG, Pickett GA. 1992. The influence of grazing on seed production and seed bank of some African savanna grasslands. J Appl Ecol, 29: 247 ～ 260
[13] Osman AE, Cocks PS, Russi L & Pagnotta M. 1991. Response of Mediterrancan grassland to phosphate and stocking rates: biomass production and botanical composition. J Agric Sci, 116:37 ～ 46
[14] Rabinowitz D. 1981. Buried viable seeds in a north American tallgreen prairie: the resemblance of their abundance and composition to dispersing seeds. Oikos, 36:191 ～ 195
[15] Russi L, Cocks PS & Roberts EH. 1992. The fate of legume seeds caten by sheep from a Mediterrancan grassland. J Appl Ecol, 29:772～778
[16] Sudebilige H, Sa R(萨仁), Zhou H(周禾), et al. 2001. The study on regeneration of species in a subtropical pasture undergoing retrogression process. Acta Ecol Sin ( 生态学报 ), 21 ( 7 ): 1104 ～ll08(in Chinese)
[17] Sun S-C(孙书存),Chen L-Z(陈灵芝).2000. Seed demography of Quercus liaotungensis in Dongling mountain region. Acta Phytoecol Sin (植物生态学报), 24(2) :215 ～221 (in Chinese)
[18] Thompson K, Grime JP. 1979. Seasonal variation in the seed banks of herbaceous species in ten contrasting habitats. J Ecol, 67: 893 ～921
[19] Thompson K. 1987. Seeds and seed banks. New Phytologist, 106:23～ 48
[20] Waser NM & Price MV. 1981. Effects of grazing on diversity of annual plants in the Sonoran Desert, Arizona, USA. Oecologia, 50:407～411
[21] Watt AS. 1981. A comparison of grazed and ungrazed grassland in East Anglian Breckland. J Range Man, 42: 266～ 274
[22] Wei J(魏均),Nan Y-H(南寅镐) 1984.Study on content of reserved material of rhizome grass in different habitats. In: Cao X-S (曹新孙 ) ed. Studies on the Integrated Control of Wind, Sand Drifting and Draught in Eastern Inner Mongolia (2). Huhehot: Inner Mongolia People' s Press. 211 ～ 221 (in Chinese)
[23] Whipple SA. 1978. The relationship of buried, germinating seeds to vegetation in an old -growth Colorado subalpine forest. Can J Bot,56:1505 ～ 1509
[24] Xu H-C(凭化成), Ban Y(班勇 ). 1996. The distribution of seeds in the soil and the sustainability of the seed bank of Larix gmelinii in northern Daxinganling Mountains. Acta Phytoecol Sin ( 植物生态学报), 20(1) :28～34(in Chinese)
[25] Yang L-M(杨利民), Li J-D(李建东), Yang Y-F(杨允菲). 1999.β-diversity of grassland communities along gradient of grazing disturbance. Chin J Appl Ecol ( 应用生态学报 ), 10(4) :442～446(in Chinese)
[26] Yang Y-F (杨允菲 ), Zhu L ( 祝玲 ), Li J-D ( 李建东 ). 1995.Quantitative characters of vegetative propagation and sexual reproduction of Puccinellia tenuiflora population on alkalized meadow of Songren Plain. Chin J Appl Ecol ( 应用生态学学 ), 6 (2): 166 ～171(in Chinese)
[27] Yang Y-F(杨允菲), Zhu L(祝玲). 1995. Comparative analysis on seed banks in saline-alkali communities in the Songnen Plain of China. Acta Phytoecol Sin(植物生态学报), 19(2): 144～ 148 (in Chinese)
[28] Zeng Y-J(曾彦军), Wang Y-R(王彦龙), Nan Z-B(南志标).2003. Soil seed banks of different grassland types of Alashan arid desert region, Inner Mongolia. Chin J Appl Ecol ( 应用生态学报 ),14(9).. 1457 ～ 1463(in Chinese)
[29] Zhang Y-M(张咏梅), He J(何静), Pan K-W(潘开文), et al.2003. Potential contribution of soil seed banks to the restoration of native plants. Chin J Appl Environ Biol ( 应用与环境生物学报 ),9 (3): 326 ～ 332 ( in Chinese )
[30] Zhao W-Z(赵文智 ), Bai S-M( 白四明 ). 2001. Characteristics of seed banks of enclosing grassland in Keerqin sand region. J Desert Res(中国沙漠), 21(2) :204～208(in Chinese)