responsesofrootgrowthofalhagisparsifoliashapfabaceaetodifferentsimulatedgroundwaterdepthsinthesouthernfringeofthetaklimakandesertchina
文献类型：期刊论文
| 作者 | Zeng Fanjiang2; Song Cong2; Guo Haifeng2; Liu Bo2; Luo Weicheng2; Gui Dongwei2; Arndt Stefan1; Guo Dali3 |
| 刊名 | journalofaridland
 |
| 出版日期 | 2013 |
| 卷号 | 5期号:2页码:220 |
| ISSN号 | 1674-6767 |
| 英文摘要 | Alhagi sparsifolia Shap. (Fabaceae) is a spiny, perennial herb. The species grows in the salinized, arid regions in North China. This study investigated the response characteristics of the root growth and the distribution of one-year-old A. sparsifolia seedlings to different groundwater depths in controlled plots. The ecological adaptability of the root systems of A. sparsifolia seedlings was examined using the artificial digging method. Results showed that: (1) A. sparsifolia seedlings adapted to an increase in groundwater depth mainly through increasing the penetration depth and growth rate of vertical roots. The vertical roots grew rapidly when soil moisture content reached 3%-9%, but slowly when soil moisture content was 13%-20%. The vertical roots stopped growing when soil moisture content reached 30% (the critical soil moisture point). (2) The morphological plasticity of roots is an important strategy used by A. sparsifolia seedlings to obtain water and adapt to dry soil conditions. When the groundwater table was shallow, horizontal roots quickly expanded and tillering increased in order to compete for light resources, whereas when the groundwater table was deeper, vertical roots developed quickly to exploit space in the deeper soil layers. (3) The decrease in groundwater depth was probably responsible for the root distribution in the shallow soil layers. Root biomass and surface area both decreased with soil depth. One strategy of A. sparsifolia seedlings in dealing with the increase in groundwater depth is to increase root biomass in the deep soil layers. The relationship between the root growth/distribution of A. sparsifolia and the depth of groundwater table can be used as guidance for harvesting A. sparsifolia biomass and managing water resources for forage grasses. It is also of ecological significance as it reveals how desert plants adapt to arid environments. |
| 语种 | 英语 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/84928]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 作者单位 | 1.墨尔本大学 2.中国科学院新疆生态与地理研究所 3.中国科学院地理科学与资源研究所 |
| 推荐引用方式 GB/T 7714 | Zeng Fanjiang,Song Cong,Guo Haifeng,et al. responsesofrootgrowthofalhagisparsifoliashapfabaceaetodifferentsimulatedgroundwaterdepthsinthesouthernfringeofthetaklimakandesertchina[J]. journalofaridland,2013,5(2):220. |
| APA | Zeng Fanjiang.,Song Cong.,Guo Haifeng.,Liu Bo.,Luo Weicheng.,...&Guo Dali.(2013).responsesofrootgrowthofalhagisparsifoliashapfabaceaetodifferentsimulatedgroundwaterdepthsinthesouthernfringeofthetaklimakandesertchina.journalofaridland,5(2),220. |
| MLA | Zeng Fanjiang,et al."responsesofrootgrowthofalhagisparsifoliashapfabaceaetodifferentsimulatedgroundwaterdepthsinthesouthernfringeofthetaklimakandesertchina".journalofaridland 5.2(2013):220. |
入库方式： OAI收割
来源：地理科学与资源研究所
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