西南林业大学学报2013，Vol.33Issue(2)：10-14,5.DOI:10.3969/j.issn.2095-1914.2013.02.003
3种湿地植物克隆生长及其生物量对不同水淹的响应
Response of Clonal Growth and Biomass Allocation of 3 Aquatic Plant Species to Different Inundation Levels
摘要
Abstract
The effects of different water level gradients on the stem length,number of clonal ramets,biomass accumulation and biomass allocation patterns of 3 aquatic plants,namely Pontederia cordata,Acorus calamus,and Iris wilsonii were studied through artificial simulation of water level control experiment.Two sets of treatments were designed with water levels for the fixed water levels (including low water level that submerged 1/2 of the pot height,medium water level that reached to the right top of pots and high water level which exceeded the pot top by 12 cm) and the fluctuated water level (i.e.low water level to 1/2 of the pot height for 14 d,then transferred to high water level that exceeded the pot top by 12 cm for 7 d),and the 2 water levels alternated in turn for 56 d,and the entire test duration was 8 weeks.The results showed that the water level gradients significantly affected on the above indexes observed of all the 3 species.The indexes of plant height,number of ramets of Pontederia cordata,Acorus calamus plants treated with the fluctuated water level were all significantly higher than those plants treated by the fixed water level (P ＜ 0.05).The biomasses of the rhizomes,leaves and root system of Pontederia cordata plants treated with the fixed high water level as well as with the fluctuated water level were all significantly higher than those plants treated by the fixed medium and low water level.Only the leaf biomass of Acorus calamus was significantly affected by the fluctuated and the fixed high water levels treatments,whose value was significantly higher than that of treated by the fixed medium and low water level.There was no significant difference in the biomasses of leaves,rhizomes and roots of Iris wilsonii among the different water level treatments (P ＞ O.05).Comprehensive speaking,the fluctuated water level treatment was more beneficial to the population establishment of the three aquatic plant species.关键词
水位梯度/水生植物/克隆生长/生物量分配Key words
water level gradient/ aquatic plant/ clonal growth/ biomass allocation分类
农业科技引用本文复制引用
闫道良,金水虎,夏国华,梅丽..3种湿地植物克隆生长及其生物量对不同水淹的响应[J].西南林业大学学报,2013,33(2):10-14,5.基金项目
浙江省科技厅重点创新团队项目(2010R50039)资助. （2010R50039）
