[Variations of water use efficiency and its relationship with leaf nutrients of different altitudes of Wuyi Mountains, China]. / æ¦å¤·å±±ä¸åæµ·ææ¤ç©æ°´åå©ç¨æççåååå
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Ying Yong Sheng Tai Xue Bao
; 28(7): 2102-2110, 2017 Jul 18.
Article
em Zh
| MEDLINE
| ID: mdl-29741038
ABSTRACT
We determined the water use efficiency and nitrogen and phosphorus concentrations of plants at different altitudes (600, 900, 1300, 1500, 1800, 2000, 2100 m) in Wuyi Mountains to understand the relationship of water use efficiency with foliar nutrients. The results showed that plant water use efficiency increased with altitude, and the leaf δ18O of tree showed no significant variance with altitude. On the whole, leaf nitrogen concentration showed no obvious trend, while leaf phosphorus concentration at high altitude was significantly higher than that at low altitude. No significant relationship between water use efficiency and foliar nitrogen concentration was found in this study, but water use efficiency had a positive correlation with foliar phosphorus concentration. In conclusion, the change of water use efficiency was mainly caused by the difference in photosynthetic rate. The effect of water status on plant water use efficiency was not significant. The variances of leaf phosphorus concentrations along the altitudinal gradient may affect photosynthetic rate and in turn the water use efficiency of plant in this area.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Fotossíntese
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Água
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Altitude
País/Região como assunto:
Asia
Idioma:
Zh
Ano de publicação:
2017
Tipo de documento:
Article