Responses of leaf carbon, nitrogen, and phosphorus stoichiometry of Carex muliensis to water table drawdown in an alpine marsh on the Ruoergai Plateau, China.
Ying Yong Sheng Tai Xue Bao
; 32(7): 2426-2432, 2021 Jul.
Article
en En
| MEDLINE
| ID: mdl-34313060
ABSTRACT
Based on a field water table drawdown manipulation platform of Naleqiao marsh on the Rueorgai Plateau, we lifted in situ soil block of 1 m×1 m by 20 cm for simulating water table decline, and analyzed the response of carbon, nitrogen, and phosphorus stoichiometry in the wetland species Carex muliensis from June to September 2020. The results showed that there was no significant difference in leaf C content during the whole growing season, while N and P content gra-dually decreased along the growing season. After the drawdown of water table, the C content in leaves during the growing season was not consistent. Water table drawdown increased leaf C content in the early and middle growth stages, but changed little in the peak growth stage. Water table drawdown significantly increased leaf N content, while significantly decreased leaf P content. CN, CP, and NP for leaves all increased along the whole growing period. The relative growth rate of C. muliensis was positively correlated with leaf CN, but negatively correlated with leaf CP and NP. Water table drawdown significantly decreased leaf CN, while significantly increased leaf CP and NP, which significantly reduced the relative growth rate of C. muliensis. The decrease of foliar P content induced by water table drawdown was the main regulating factor for the decrease of single leaf weight and specific leaf weight.
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Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Agua Subterránea
/
Carex (Planta)
País/Región como asunto:
Asia
Idioma:
En
Revista:
Ying Yong Sheng Tai Xue Bao
Asunto de la revista:
SAUDE AMBIENTAL
Año:
2021
Tipo del documento:
Article
País de afiliación:
China