水深梯度对菹草生长的影响

生态学杂志

水深梯度对菹草生长的影响

何伟¹;王国祥¹;杨文斌^1,2;陈秋敏¹;陆贻超¹

¹南京师范大学地理科学学院江苏省环境演变与生态建设重点实验室, 南京 210046; ²安徽师范大学环境科学学院，安徽芜湖 241003

收稿日期:2008-10-22 修回日期:1900-01-01 出版日期:2009-07-10 发布日期:2009-07-10

Growth response of Potamogeton crispus to water depth gradient.

HE Wei¹;WANG Guo-xiang¹;YANG Wen-bin^1,2;CHEN Qiu-min¹;LU Yi-chao¹

¹Jiangsu Key Laboratory of Environmental Change and Ecological Construction, School of Geography Science, Nanjing Normal University, Nanjing 210046, China;²College of Environmental Science, Anhui Normal University, Wuhu 241003, Anhui, China

Received:2008-10-22 Revised:1900-01-01 Online:2009-07-10 Published:2009-07-10

摘要/Abstract

摘要： 用盆栽试验方法，将菹草石芽种植在水下30、60、90、120、150、180 cm的花盆内，研究了水深梯度对菹草生长的影响。结果表明：菹草株高与水深显著相关（P<0.01），菹草生长的适宜水深范围为90～150 cm;5月7日前后，除水深180 cm组外，其他实验组虽然株高有所增加，但叶片数量反而减少，植株开始衰老腐烂;水深差异对菹草叶片光合色素含量影响不明显;水深30、60 cm组菹草的F_v/F_m、ETR值低于深水处其他处理组，表明在菹草生长的中后期，水面光照对水深浅于60 cm的菹草叶片光合电子传递效率有一定的阻碍作用;从快速光响应曲线可以看出，在菹草生长的中后期，水深<60 cm、>150 cm对菹草生长不利。

关键词: 荫香, 光合作用的限制, 温度增高, CO₂浓度增高

Abstract: In a pot culture experiment, Potamogeton crispus was planted at the water depths 30, 60, 90, 120, 150, and 180 cm, with its growth response to the water depth gradient was studied. The stem length of P. crispus had a significant correlation with water depth (P<001), and the appropriate water depth for P. crispus growth was 90〖KG-*2〗-〖KG-*7〗150 cm. Around May 7th, the leaf numbers of P. crispus in all treatments except at the water depth 180 cm decreased, indicating that the plant became senescent. The difference in water depth had no significant effects on the photosynthetic pigment content of P. crispus. At the water depths 30 and 60 cm, the Fv/Fm and photosynthetic electron-transport rate (ETR) of P. crispus were lower, illustrating that a water depth less than 60 cm had certain inhibitory effects on the photosynthetic electron-transport rate during the mid- or late growth period of P. crispus. It was suggested that water depth less than 60 cm or more than 150 cm was not beneficial to the P. crispus during its mid or late growth period.

Key words: Cinnamomum burmannii, Restriction of photosynthesis, Elevated temperature, Elevated CO₂ concentration

何伟;王国祥;杨文斌;陈秋敏;陆贻超. 水深梯度对菹草生长的影响[J]. 生态学杂志.

HE Wei¹;WANG Guo-xiang¹;YANG Wen-bin^1,2;CHEN Qiu-min¹;LU Yi-chao¹ . Growth response of Potamogeton crispus to water depth gradient.[J]. cje.