PDF
Full
Outline
The technology of planting Sesuvium portulacastrum for ecological restoration has been widely used in Fujian and other places with remarkable results. It is worth discussing whether it can be applied in Hangzhou Bay with eutrophication. The rapid growth of S. portulacastrum can absorb large amounts of nitrogen and phosphorus and remove excess nutrients from water. In this paper, the ecological adaptability of S. portulacastrum to different light intensity, salinity and temperature were studied, and the low temperature and high salinity stress and compound stress were studied further, which is to meet the actual restoration necessary of Hangzhou Bay wetland or water area using S. portulacastrum. S. portulacastrum had a wide tolerance to light intensity, with a light saturation point of 300 μmol/(m2·s), and was intolerant to high light irradiation, but the inhibition of high light on relative electron transfer efficiency was low. S. portulacastrum had a wide range of tolerance to salinity, which could grow in low salinity or fresh water, and the species can tolerate high salt stress more than 25. It grew better in salinity 15 than those of all treatment groups (P<0.05). Appropriate salt treatment could promote root growth and development. S. portulacastrum could tolerate a wide range of temperature expect for very low temperature. S. portulacastrum still maintained a high growth rate in high temperature, 25 ℃ was the best status for the species growth, and the growth rate was significantly higher than that of other treatment group (P<0.05) with accumulation of dry matter faster, plant height, root length grew rapidly and leaf number increased. Low temperature stress in 5 ℃ was reversible and the plant could grow when temperature roise. But the plant was completely dead under 0 ℃ in about 24 days. The plants in the fresh water group died at 5 ℃, but the survival rate of salinity 15 was 100% at 25 ℃, the survival rate of salinity 25 was 40% at 0 ℃, and all plants in the fresh water group died, indicating that salt stress may be beneficial to plant resistance to low temperature stress. Outdoor experiments showed that S. portulacastrum could adapt to Hangzhou Bay climate, but the effect of extreme weather needs to be considered. In conclusion, the ecological restoration technology of S. portulacastrum could be applied in Hangzhou Bay basically, and the study would provide a new idea for the ecological restoration of Hangzhou Bay.
PDF
40
10
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62199257
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
