蒙古莸种群繁殖更新策略
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摘要
采用固定样方观测法对位于黄土丘陵沟壑区的蒙古莸自然种群有性繁殖和营养繁殖现状进行调查,总结出蒙古莸自然种群繁殖更新策略。并在自然群落中通过遮阴浇水处理研究其繁殖扩散限制因子。结果表明:蒙古莸自然种群繁殖更新以有性繁殖为主,营养繁殖为辅。营养繁殖发生在冠型较大植株枝条被沙埋后,分株数量随着基株基径的增大而增多。5月至7月蒙古莸实生苗萌生出土,一年内实生苗的存活率为19.75%,更新强度为0.11株/m~2。高温、干旱降低幼苗存活率,缺乏光照幼苗生长受限。
Caryopteris mongolica,a rare and endangered small shrub with high economic and ecological values,is mainly found in arid grasslands in northern China. To explore the population regeneration strategy for the plant,the study combined the field investigation with experiment to investigate the reproductive features of the plant,including sexual reproduction and asexual propagation in Daliuta,arid grasslands of Northern China. The main results are as follows: C. mongolica mainly via sexual reproduction for regeneration,although it was capable of asexual propagation by stolon. Vegetative propagation occurred when the branches were buried in the field conditions. The number of ramet increased significantly with the increase of maternal plant base diameter. The seedlings of C. mongolica were discovered from May to July,and the seedlings wer the most in the middle and late July. In the natural field condition,the survival rate and reproduction strength of seedlings of C. mongolica were 19. 75% and 0. 11 plants/m~2,respectively. High temperature and drought reduced the survival rate of C.mongolica seedlings,and the lack of illumination restricted their growth.
Caryopteris mongolica,a rare and endangered small shrub with high economic and ecological values,is mainly found in arid grasslands in northern China. To explore the population regeneration strategy for the plant,the study combined the field investigation with experiment to investigate the reproductive features of the plant,including sexual reproduction and asexual propagation in Daliuta,arid grasslands of Northern China. The main results are as follows: C. mongolica mainly via sexual reproduction for regeneration,although it was capable of asexual propagation by stolon. Vegetative propagation occurred when the branches were buried in the field conditions. The number of ramet increased significantly with the increase of maternal plant base diameter. The seedlings of C. mongolica were discovered from May to July,and the seedlings wer the most in the middle and late July. In the natural field condition,the survival rate and reproduction strength of seedlings of C. mongolica were 19. 75% and 0. 11 plants/m~2,respectively. High temperature and drought reduced the survival rate of C.mongolica seedlings,and the lack of illumination restricted their growth.
引文
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[19]He Y,He X,Liu Z,Zhao S,Bao L,Li Q,Yan L.Coal mine subsidence has limited impact on plant assemblages in an arid and semi-arid region of northwestern China[J].Ecoscience,2017,24(3-4):91-103.
[20]陈燕.西南区野生马蹄金繁殖特性研究[D].成都:四川农业大学,2008.
[21]郭春燕.蒙古莸生殖生物学研究[D].呼和浩特:内蒙古农业大学,2009.
[2]王颖,蔺吉祥,丁雪梅,张娜,韩相奎.降水格局变化对植物繁殖策略影响的研究进展[J].中国农学通报,2014,30(36):253-256.
[3]袁秀英,袁登胜,白玉明.固定和半固定沙丘花棒克隆生长构型的比较研究[J].西北林学院学报,2006,21(6):32-34.
[4]张建华,马成仓,李清芳,乌云其其格,高玉葆.垫状锦鸡儿的繁殖方式及其在适应干旱荒漠环境中的生态意义[J].天津师范大学学报(自然科学版),2011,31(4):55-59.
[5]陈玉福,董鸣.毛乌素沙地根茎灌木羊柴的基株特征和不同生境中的分株种群特征[J].植物生态学报,2000,24(1):40-45.
[6]扈顺.四合木繁殖特性及扦插生根解剖学研究[D].呼和浩特:内蒙古农业大学,2014.
[7]金洪,高润宏,庄光辉,谢君仁.阿拉善荒漠绵刺克隆生长格局研究[J].北京林业大学学报,2003,25(2):24-27.
[8]Baker P.Seedling establishment and growth across forest types in an evergreen deciduous forest mosaic in western Thailand[J].Natural History Bulletin of the Siam Society,1997,45:17-41.
[9]苏嫄,焦菊英,王志杰.陕北黄土丘陵沟壑区坡沟立地环境下幼苗的存活特征[J].植物生态学报,2014,38(7):694-709.
[10]张凯,慕小倩,孙晓玉,汪梦竹,胡胜武.温度变化对油菜及其伴生杂草种苗生长和幼苗生理特性的影响[J].植物生态学报,2013,37(12):1132-1141.
[11]王晓江,李爱平,宁明世,张纪刚.生态灌木蒙古莸的生物生态学特性及其经济价值评价[J].干旱区资源与环境,2006,20(2):191-194.
[12]赵一之.蒙古莸的植物区系地理分布研究[J].内蒙古大学学报(自然科学版),1995,26(2):195-197.
[13]郭春燕,贺晓,高建平,刘果厚.蒙古莸的开花物候与生殖特征[J].西北植物学报,2012,32(10):2040-2046.
[14]高建平,贺晓,郭春燕,石小兰.蒙古莸小孢子发生和雄配子体发育的研究[J].西北植物学报,2009,29(6):1149-1154.
[15]郭春燕,贺晓,刘果厚,钱连红,卢立娜.蒙古莸结实格局研究[J].干旱区资源与环境,2014,28(7):156-160.
[16]郭春燕,贺晓,刘果厚,高建平,卢立娜.不同储藏环境和时间对蒙古莸种子萌发的影响[J].种子,2014,33(6):17-20.
[17]郝翠枝,郝连瑞,贾文峰.浅谈蒙古莸在二连浩特的栽培技术[J].内蒙古林业,2010(6):22.
[18]贺一鸣,贺晓,包丽颖,郭春燕,高建平,李琪.蒙古莸(Caryopteris mongolica)种群空间格局及枝系构型[J].中国沙漠,2016,36(4):1007-1013.
[19]He Y,He X,Liu Z,Zhao S,Bao L,Li Q,Yan L.Coal mine subsidence has limited impact on plant assemblages in an arid and semi-arid region of northwestern China[J].Ecoscience,2017,24(3-4):91-103.
[20]陈燕.西南区野生马蹄金繁殖特性研究[D].成都:四川农业大学,2008.
[21]郭春燕.蒙古莸生殖生物学研究[D].呼和浩特:内蒙古农业大学,2009.