梭梭幼苗个体生长规律与死亡率关系研究

doi:10.7525/j.issn.1673-5102.2016.01.012

植物研究 ›› 2016, Vol. 36 ›› Issue (1): 84-89.doi: 10.7525/j.issn.1673-5102.2016.01.012

梭梭幼苗个体生长规律与死亡率关系研究

田媛¹；唐立松^2,4；乔瑞平^1,3

1.博天环境集团股份有限公司，北京　100082；
2.中国科学院新疆生态与地理研究所荒漠与绿洲生态国家重点实验室，乌鲁木齐　830011；
3.北京博天环境设计研究院有限公司，北京　100081；
4.中国科学院阜康荒漠生态系统研究站，阜康　831500

出版日期:2016-01-15 发布日期:2016-05-18

Relationships between the Mortality and Morphoallaxis of Haloxylon ammodendron Seedling

TIAN Yuan¹；TANG Li-Song^2,4；QIAO Rui-Ping^1,3

1.Poten Environment Group Co.,Ltd,Beijing　100082；
2.State Key Laboratory of Desert and Oasis Ecology,Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,Urumqi　830011；
3.Poten(Beijing) Environment Design & Research Institute Co.,Ltd.,Beijing　100081；
4.Fukang Stations of Desert Ecology,Chinese Academy of Sciences,Fukang　831500

Online:2016-01-15 Published:2016-05-18

摘要/Abstract

摘要： 以古尔班通古特沙漠南缘建群种梭梭的一年生幼苗为研究对象，对幼苗生长和周边环境因子进行了全生长期的连续监测，以期探明一年生梭梭的生长、存活规律。结果表明：梭梭幼苗在水分条件较好的早春生长迅速，但随着降水的减少，7月幼苗地上地下部分都出现了不同程度的凋落，8月恢复生长。在整个生长期中，幼苗死亡率呈现下降趋势，这说明较高的死亡率使得梭梭幼苗快速生长以抢占更多资源；当遭遇干旱时，幼苗又通过同化枝凋落迅速建立了根系供水与地上部分需水之间的新平衡，从而降低了死亡率。同时，幼苗以牺牲地上部分生长为代价将更多的光合产物转向根系，使得幼苗能够获得更多的水分保证生存。

关键词: 梭梭幼苗, 死亡率, 根系, 水分, 生物量

Abstract: We studied the growth of Haloxylon ammodendron seedlings to reveal their growth traits and adaptabilities in the southern edge of Gurbantunggut Desert. The the seedlings grew well from early spring when the soil water content was high. With the consumption of soil moisture, the above- and below-ground part of the plant began to fall off, and then both parts recovered growing in August. Seedling mortality showed a downward trend in the whole growth period. H.ammodendron seedling could occupy more resource through rapid growth because of the high mortality rate. The falling of the assimilating branches during the drought period could maintain balance between water supply deficit and water consume of the assimilating organs. This morphological adjustment reduced seedling mortality effectively. Also, the fact that more photosynthate was assigned toward root could ensure seedling survival and recover growth quickly at proper water conditions.

Key words: Haloxylon ammodendron seedlings, mortality rate, root, water, biomass

田媛1；唐立松2,4；乔瑞平1,3. 梭梭幼苗个体生长规律与死亡率关系研究[J]. 植物研究, 2016, 36(1): 84-89.

TIAN Yuan1；TANG Li-Song2,4；QIAO Rui-Ping1,3. Relationships between the Mortality and Morphoallaxis of Haloxylon ammodendron Seedling[J]. Bulletin of Botanical Research, 2016, 36(1): 84-89.

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梭梭幼苗个体生长规律与死亡率关系研究

Relationships between the Mortality and Morphoallaxis of Haloxylon ammodendron Seedling

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