湿地土壤埋深对芦苇、香蒲种子萌发的影响  

Effects of soil burial depth on the seed germination of Phragmites australis and Typha domingensis

作　　者：孟焕[1,2] 王雪宏[1] 佟守正[1] 吕宪国[1] 张文广[1] 霍莉莉[1,2] 娄晓楠[1] 孟宪坤 

机构地区：[1]中国科学院湿地生态与环境重点实验室,中国科学院东北地理与农业生态研究所,长春130012 [2]中国科学院大学,北京100049 [3]富锦沿江湿地自然保护区管理局,黑龙江富锦156100

出　　处：《生态学杂志》2013年第9期2320-2325,共6页Chinese Journal of Ecology

基　　金：国家自然科学基金项目(40971053);水体污染控制与治理科技重大专项(2012ZX07201004)资助

摘　　要：土壤埋藏深度是影响湿地植物种子萌发与幼苗生长的重要因子。通过室内模拟实验,分析了松花江下游沿江湿地7种土壤埋深(0、5、10、15、20、25和30 mm)对芦苇和香蒲2种典型湿地植物种子发芽率、发芽速率、芽长和根长的影响,旨在利用芦苇、香蒲等湿地植物以有性繁殖的方式为松花江下游沿江湿地恢复提供技术支持。结果表明:土壤埋深对芦苇、香蒲种子的发芽率和发芽速率均有显著影响,2种植物种子发芽率、发芽速率随土壤埋深增加波动变化;0和25 mm土壤埋深时芦苇种子发芽率较高、发芽速度较快;0和>20 mm土壤埋深时香蒲种子发芽率较高、发芽速度较快;从芽长和根长来看,<10 mm的土壤埋深更利于2种植物存活和生长;相同土壤埋深情况下,芦苇种子较香蒲种子具有更强的萌发能力。Soil burial depth is one of the key factors affecting the seed germination and seedling growth of wetland plants. In this paper, a laboratory simulation experiment was conducted to study the effects of soil burial depths （0, 5, 10, 15, 20, 25, and 30 mm） on the seed germina- tion percentage （GP）, germination speed （GS）, shoot length （SL） , and root length （RL） of Phragmites australis and Typha domingensis in the riparian wetlands along the downstream of Songhua River, Northeast China. The main objective of this study was to provide the technique and strategy for guiding vegetation restoration via sexual reproduction approaches for P. australis and T. domingensis along the downstream of Songhua River. Significant effects of soil burial depth on the GP and GS were observed for both P. australis and T. domingensis. The seed GP and GS of P. australis and T. P. australis were higher when domingensis varied with soil burial the soil burial depths 0 mm and 25 depth. The seed GP and GS of mm, while those of T. domin- gensis were higher when the soil burial depths were 0 mm and 〉 25 mm. From the viewpoints of SL and RL, the soil burial depths of 〈 10 mm were more beneficial to the survival and growth of P. australis and T. domingensis. At the same soil burial depths, the seeds of P. australis had stronger germination ability than those of T. domingensis.

关 键 词：有性繁殖 环境因子 湿地植物 

分 类 号：S564.2[农业科学—作物学] S564.4