OALib Journal期刊
ISSN: 2333-9721
费用：99美元

投递稿件

查看量	下载量

相关文章
更多...

中国沙漠 2015

梭梭(Haloxylonammodendron)种子密度对萌发及幼苗生长的影响

DOI: 10.7522/j.issn.1000-694X.2014.00127

王国华, 赵文智

Keywords: 种子密度,梭梭(Haloxylonammodendron),更新,生长高度

Full-Text Cite this paper Add to My Lib

Abstract:

研究了梭梭(Haloxylonammodendron)种子密度对萌发和幼苗生长、存活的影响及其对梭梭种群更新的作用。在自然条件下设置80、160、320、480、640、960粒·m-2等6个种子密度处理,每个处理5次重复,对梭梭种子萌发和幼苗生长进行了全生长季观测。结果表明:种子萌发率随密度的增加呈增长趋势,在密度为80粒·m-2时,萌发率为28%,当密度达到960粒·m-2时,萌发率为54%;幼苗存活率随种子密度增加呈现先增加后减小的趋势,160粒·m-2种子密度下出土幼苗存活率最高为25%,320粒·m-2种子密度下出土幼苗存活率最高为22%,当密度增加到960粒·m-2,萌发出土的幼苗成活率为11%;综合考虑种子萌发率和幼苗存活率,在1cm沙埋深度下320粒·m-2为最佳密度。幼苗生长高度会受到幼苗数量的影响,单位面积上一定范围内幼苗数量增加可以使幼苗生长高度增加,但当幼苗数量超过一定范围,幼苗生长减慢。单纯从幼苗数量来看,种子密度越大,幼苗更新数量越多。

References

[1]	Thompson K,Grime J P. Seasonal variationin the seed bank of herbaceous species in ten contrasting habitats[J].Journal of Ecology,1979,67:893-921.
[2]	Coffin D P,Lauenroth W R.Spatial and temporal variation in the seed bank of semiarid grass land[J].American Journal of Botany,1989,76(1):53-58.
[3]	杨允菲,祝玲.松嫩平原盐碱植物群落种子库的比较分析[J].植物生态学报,1995,19(2):144-148.
[4]	王刚,梁学功.沙坡头人工固沙区的种子库动态[J].植物学报,1995,37(3):231-237.
[5]	刘济明.贵州茂兰喀斯特森林中华蚊母树群落种子库及其萌发特征[J].生态学报,2001,21(2):197-203.
[6]	Hill M O,St even P A.The density of viable seed of forest plantation in uplands Britain[J].Journal of Ecology,1981,69:693-709.
[7]	王刚,梁学功,冯波.沙漠植物的更新生态位:油蒿、柠条、花棒的种子萌发条件的研究[J].西北植物学报,1995,15:102-105.
[8]	Guo Q,Rundel P W,Goodall D W.Horizontal and vertical distribution of desert seed banks:patterns,causes,and implications[J].Journal of Arid Environments,1998,38:465-478.
[9]	Guo Q,Rundel P W,Goodall D W.Structure of desert seed banks:Comparisons across four North American desert sites[J].Journal of Arid Environments,1999,42:1-14.
[10]	Cabin R J,Marshall D L.The demographic role of soil seed banks.I.Spatial and temporal comparisons of below and above ground populations of the desert mustard Lesquerella fendleri[J].Journal of Ecology,2000,88:283-292.
[11]	Marone,Rossi B E,Casenave J L.Granivore impact on soil seed reserves in the central Montedesert,Argentina[J].Functional Ecology,1998,12:640-645.
[12]	刘志民,赵文智,李志刚.西藏雅鲁藏布江中游河谷砂生槐种群种子库特征[J].生态学报,2002,22(5):715-722.
[13]	黄振英,Gutterman Y,胡正海,等.白沙蒿种子萌发特性的研究Ⅰ:粘液瘦果的结构和功能[J].植物生态学报,2001,25:22-28.
[14]	李荣平,蒋德明,刘志民,等.沙埋对六种植物种子萌发和幼苗出土的影响[J].应用生态学报,2004,15:1865-1868.
[15]	史胜青,齐力旺,孙晓梅,等.梭梭抗旱性相关研究现状及对今后研究的建议[J].世界林业研究,2006,19(5):27-32.
[16]	中国科学院中国植物志编辑委员会.中国植物志(第25卷,第二分册:被子植物门)[M].北京:科学出版社,1979.
[17]	刘瑛心.中国沙漠植物志(第一卷)[M].北京:科学出版社,1985.
[18]	刘家琼,黄子琛,鲁作民.民勤地区梭梭衰亡原因初步研究[J].中国沙漠,1982,2(2):44-46.
[19]	陈芳,纪永福,张锦春,等.民勤梭梭人工林天然更新的生态条件[J].生态学杂志,2010,29(9):1691-1695.
[20]	王继和,马全林.民勤绿洲人工梭梭林退化现状、特征与恢复对策[J].西北植物学报,2003,23(12):2107-2112.
[21]	Khan M A,Ungar I A.Influence of salinity and temperature on the germination of Haloxylon recurvum[J].Annals of Botany,1996,78:547-551.
[22]	Tobe K,Li X,Omasa K.Effects of sodium chloride on seed germination and growth of two Chinese desert shrubs,Haloxylon ammodendron and H.persicum(Chenopodiaceae)[J].Australian Journal of Botany,2000,48:455-460.
[23]	Wang X Y,Wei Y,Yan Ch,et al.Germination response of two species of Haloxylon to temperature and salinity[J].Arid Zone Research,2004,21(5):58-63.
[24]	魏岩,王习勇.果翅对梭梭属种子萌发行为的调控[J].生态学报,2006,26(12):4014-4018.
[25]	王锐,孙权,王青凤,等.不同控制条件对沙生植物发芽率的影响[J].林业实用技术,2009,9:10-11.
[26]	刘冰.荒漠区灌木对降水脉动响应研究[D].北京:中国科学院,2009.
[27]	Fenner M,Thompson K.The Ecology of Seeds[M].Cambridge,UK:Cambridge University Press,2005.
[28]	Bew ley J D,Black M.Seeds Physiology of Deve-lopment and Germination[M].New York,USA:Plenum Press,1994.
[29]	赵昕,李玉霖.高温胁迫下冷地型草坪草几项生理指标的变化特征[J].草业学报,2001,10(4):85-91.
[30]	夏日帕提力提甫.梭梭种子发芽生理初探[J].新疆大学学报(自然科学版),1996,13(3):69-72.
[31]	Huang Z Y,Zhang X S,Zheng G H,et al.Influence of light,temperature,salinity and storage on seed germination of Haloxylon ammodendron[J].Journal of Arid Environments,2003,55:453-464.
[32]	Ren J,Tao L,Liu X M.Effect of sand burial depth on seed germination and seedling emergence of Calligonum L.species[J].Journal of Arid Environments,2002,51(4):603-611.
[33]	Thompson P A.Seed germination in relation to ecological and geographical distribution[M]//Heywood V A.Taxonmy and Ecology.London,UK:Academic Press,1973.
[34]	Lloret F,Casanovas C,Penuelas J.Seedling survival of Mediterranean shrubland species in relation to root:shoot ratio,seed size and water and nitrogen use[J].Functional Ecology,1999,13:210-216.
[35]	Hofmann M,Isselstein J.Effects of drought and competition by a ryegrass sward on the seedling growth of a range of grassland species[J].Journal of Agronomy and Crop Science,2004,190:277-286.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133