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黄土高原半干旱区退化草地恢复与利用过程研究

DOI: 10.1360/052013-280, PP. 267-279

Keywords: 黄土高原,退化草地,封禁,群落演替,放牧,刈割

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Abstract:

草地退化表现为土壤和植被遭到彻底破坏,草地演替过程受到强烈抑制.实验采用长期(30年)封禁措施,定位监测退化草地从次生半裸地演变为近似原生植被(进展演替)的变化过程.结果表明,随着封禁时间的变化,退化草地恢复演替经历了4个阶段,群落盖度、植株密度、物种丰富度和多样性指数、地上生物量和地下生物量在草地群落恢复过程中逐渐增加,其特征变化出现的峰值均在封禁第20年(地下生物量峰值在第15年),其中地上生物量最高达520.5g/m2;直到封禁的第20~25年,以本氏针茅为建群种的草原群落衰败退化现象明显,而大针茅种群密度剧增;在封禁的第26年以上以大针茅为优势的群落生长较为稳定,从目前群落演替进程看,大针茅有替代本氏针茅的趋势.另外,在草原沟道两侧以斑块状聚集分布有中旱生灌木,群落的演替进入了一个新的阶段.随着封禁时间的延续,退化草地从自然封禁恢复的0~26年,通过侵入-竞争-扩散-定居的几个演替阶段,目前形成以大针茅为建群种相对稳定的“亚顶级”.虽然草地生物量有一定下降,但草地质量提高,物种多样性丰富,促进草地的进展演替.草地植物群落主要由禾本科、豆科和菊科组成;多年生植物、C3和旱生物种可以作为草地演替过程和植被恢复的指示物种.长期封育对草地物种更新和生态系统稳定性有负面影响,因此,合理的封育时间是草地生态恢复中非常重要的一个因素.本研究提出,在黄土区退化草地封育10~15年后可以开始进行合理的利用,例如通过两年一次刈割和轻度放牧(2只羊/hm2).本研究可为干旱区、半干旱区相似的退化草地恢复提供理论依据.

References

[1]  29 王占军, 蒋齐, 潘占兵, 等. 宁夏毛乌素沙地退化草原恢复演替过程中物种多样性与生产力的变化, 草业科学, 2005, 22: 5-8
[2]  30 李永宏, 汪诗平. 放牧对草原植物的影响. 中国草地, 1999, 3: 11-19
[3]  31 Vickery P J. Grazing and net primary production of a temperate grassland. J Appl Ecol, 1992, 9: 307-314
[4]  32 Mcnaushton S J. Serengeti migratory wildebeest: facilitation of energy flow by grazing. Science, 1976, 191: 92-94
[5]  33 Risser P G. Making ecological information practical for resource managers. Ecol Appl, 1993, 3: 37-38
[6]  34 张继义, 赵哈林. 科尔沁沙地草地植被恢复演替进程中群落优势种群空间分布格局研究. 生态学杂志, 2004, 23: 1-6
[7]  35 Noy-Meir I. Compensating growth of grazed plants and its relevence to the use of rangelands. Ecol Appl, 1993, 3: 32-34
[8]  36 闫玉春, 唐海萍, 辛晓平, 等. 围封对草地的影响研究进展. 生态学报, 2009, 29: 5039-5046
[9]  37 李永强, 许志信. 典型草原区撂荒地植物群落演替过程中物种多样性变化. 内蒙古农业大学学报, 2002, 23: 26-31
[10]  38 Dumont B, Farruggia A, Garel J P, et al. How does grazing intensity influence the diversity of plants and insects in a species-rich upland grassland on basalt soils? Grass Forage Sci, 2009, 64: 92-105
[11]  39 Hickman K R, Hartnett D C, Cochran R C, et al. Grazing management effects on plant species diversity in tallgrass prairie. J Range Manage, 2004, 57: 58-65
[12]  40 Sarmiento G, Pinillos M, da Silva M P, et al. Effects of soil water regime and grazing on vegetation diversity and production in a hyperseasonal savanna in the Apure Llanos, Venezuela. J Trop Ecol, 2004, 20: 209-220
[13]  41 Hobbs R J, Huenneke L F. Disturbance, diversity, and invasion: implications for conservation. Conserv Biol, 1992, 6: 324-337
[14]  42 He N P, Zhang Y H, Yu Q, et al. Grazing intensity impacts soil carbon and nitrogen storage of continental steppe. Ecosphere, 2011, 2: art8
[15]  43 Zhou H K, Tang Y H, Zhao X Q, et al. Long-term grazing alters species composition and biomass of a shrub meadow on the Qinhai-Tibet Plateau. Pak J Bot, 2006, 38: 1055-1069
[16]  44 闫玉春, 唐海萍. 围栏禁牧对内蒙古典型草原群落特征的影响. 西北植物学报, 2007, 27: 1225-1232
[17]  45 张金屯. 植被数量生态学方法. 北京: 中国科学技术出版社, 1995. 259-266
[18]  46 张大勇. 理论生态学研究. 北京: 高等教育出版社, 2000. 170-172
[19]  47 Kimmins J P. Forest Ecology. New York: Macmillan Publishing Company, 1987. 305-308蔡飞, 宋永昌. 武夷山木荷种群结构和动态的研究. 植物生态学报, 1997, 21: 138-148
[20]  28 许志信, 李永强, 额尔德尼, 等. 草原弃耕地植物群落特征和植被演替情况的调查研究. 内蒙古草业, 2002, 14: 10-13
[21]  12 Jiao J Y, Tzanopoulos J, Xofis P, et al. Factors affecting the distribution of vegetation types on abandoned cropland in the hilly-gullied Loess Plateau region of China. Pedosphere, 2008, 18: 24-33
[22]  13 Bai Y F, Han X G, Wu J G, et al. Ecosystem stability and compensatory effects in the Inner Mongolia grassland. Nature, 2004, 431: 181-184
[23]  14 Cheng J, Cheng J M, Hu T M, et al. Dynamic changes of Stipa bungeana steppe species diversity as better indicators for soil quality and sustainable utilization mode in Yunwu Mountain Nature Reserve, Ningxia, China. Clean Soil Air Water, 2012, 40: 127-133
[24]  15 He N, Han X, Yu G, et al. Divergent changes in plant community composition under 3-decade grazing exclusion in continental steppe. PLoS ONE, 2011, 6: e26506
[25]  16 Dang X H, Liu G B, Xue S. Models of soil and water conservation and ecological restoration in the loess hilly region of China. 农业工程学报, 2010, 26: 72-80
[26]  17 张新时. 毛乌素沙地的生态背景及草地建设的原则与优化模式. 植物生态学报, 1994, 18: 1-16
[27]  18 陈佐忠. 草原生态系统20年定位研究进展与展望. 中国草地, 1999, 27: 1-10
[28]  19 柳海鹰, 李政海, 刘玉虹, 等. 羊草草原在放牧退化与围封恢复过程中群落性状差异的变化规律. 内蒙古大学学报(自然科学版), 2000, 31: 314-318
[29]  20 赵哈林, 赵学勇, 张铜会, 等. 沙漠化过程中植物的适应对策及植被稳定性机理. 广州: 海洋出版社, 2004
[30]  21 张龙生. 毛乌素沙地东南部人工植被演替研究. 中国沙漠, 1994, 14: 79-82
[31]  22 陈生永. 沙地植被演替研究成果综述. 山西水土保持科技, 2001, 4: 23-36
[32]  23 辛晓平, 徐斌, 单宝庆, 等. 恢复演替中草地斑块动态及尺度转换分析. 生态学报, 2000, 20: 587-593
[33]  24 徐彩琳, 李自珍. 干旱荒漠区人工植物群落演替模式及其生态学机制研究. 应用生态学报, 2003, 14: 1451-1456
[34]  25 陈云云, 谢应忠. 退化草地恢复过程中植被与环境动态特征研究. 宁夏农学院学报, 2004, 25: 21-24
[35]  26 焦菊英, 张振国, 贾燕锋, 等. 陕北丘陵沟壑区撂荒地自然恢复植被的组成结构与数量分类. 生态学报, 2008, 28: 2981-2997
[36]  27 杜峰, 山仑, 陈小燕, 等. 陕北黄土丘陵区撂荒演替研究-撂荒演替序列. 草地学报, 2005, 13: 328-333
[37]  1 Zhan X, Li L, Cheng W. Restoration of Stipa krylovii steppes in Inner Mongolia of China: assesment of seed banks and vegetation composition. J Arid Environ, 2007, 68: 298-307
[38]  2 Zhang J T, Ru W M, Li B. Relationships between vegetation and climate on the Loess Plateau in China. Folia Geobot, 2006, 41: 151-163
[39]  3 Slimani H, Aidoud A, Roze F. 30 years of protection and monitoring of a steppic rangeland undergoing desertification. J Arid Environ, 2010, 74: 685-691
[40]  4 Simmons M T, Venhaus H C, Windhager S. Exploiting the attributes of regional ecosystems for landscape design: the role of ecological restoration in ecological engineering. Ecol Eng, 2007, 30: 201-205
[41]  5 Wang X H, Yu J B, Zhou D, et al. Vegetative ecological characteristics of restored reed (Phragmites australis) wetlands in the Yellow River Delta, China. Environ Manage, 2012, 49: 325-333
[42]  6 Walker K, Stevens P, Stevens D, et al. The restoration and re-creation of species-rich lowland grassland on land formerly managed for intensive agriculture in the UK. Biol Conserv, 2004, 119: 1-18
[43]  7 Wei J, Cheng J, Li W, et al. Comparing the effect of naturally restored forest and grassland on carbon sequestration and its vertical distribution in the Chinese Loess Plateau. PLoS ONE, 2012, 7: e40123
[44]  8 Zhang J, Dong Y. Factors affecting species diversity of plant communities and the restoration process in the loess area of China. Ecol Eng, 2010, 36: 345-350
[45]  9 Zhang J T. Succession analysis of plant communities in abandoned croplands in the eastern Loess Plateau of China. J Arid Environ, 2005, 63: 458-474
[46]  10 Gattie D K, Smith M C, Tollner E W, et al. The emergence of ecological engineering as a discipline. Ecol Eng, 2003, 20: 409-420
[47]  11 Jiao J Y, Tzanopoulos J, Xofis P, et al. Can the study of natural vegetation succession assist in the control of soil erosion on abandoned croplands on the Loess Plateau, China? Restor Ecol, 2007, 15: 391-399

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