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CATENA ◽  
2022 ◽  
Vol 209 ◽  
pp. 105843
Author(s):  
Carla Candeias ◽  
Paula F Ávila ◽  
Cristina Sequeira ◽  
Albuquerque Manuel ◽  
Fernando Rocha

Author(s):  
Zia Ur Rahman Farooqi ◽  
Ghulam Murtaza ◽  
Sadia Bibi ◽  
Muhammad Sabir ◽  
Gary Owens ◽  
...  
Keyword(s):  

2022 ◽  
Author(s):  
Chenhao Lyu ◽  
Jiawei Chen ◽  
Lei Li ◽  
Zhuqing Zhao ◽  
Liu Xinwei
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PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e12611
Author(s):  
YaLan Liu ◽  
Bo Liu ◽  
Zewei Yue ◽  
Fanjiang Zeng ◽  
Xiangyi Li ◽  
...  

The effects of increasing nitrogen (N) and phosphorus (P) deposition on the nutrient stoichiometry of soil and plant are gaining improving recognition. However, whether and how the responses of N cycle coupled with P of the soil–plant system to external N and P deposition in alpine grassland is still unclear. A short-term external N and P addition experiment was conducted in an alpine grazing grassland in the KunLun Mountain to explore the effects of short-term N and P addition on the nutrient stoichiometry in soil and plant. Different rates of N addition (ranging from 0.5 g N m−2 yr−1 to 24 g N m−2 yr−1) and P addition (ranging from 0.05 g N m−2 yr−1 to 3.2 g P m−2 yr−1) were supplied, and the soil available N, P, leaf N and P stoichiometry of Seriphidium rhodanthum which dominant in the alpine ecosystem were measured. Results showed that N addition increased soil inorganic N, leaf C, leaf N, and leaf N:P ratio but decreased soil available P and leaf C:P. Furthermore, P addition increased soil available P, leaf P, soil inorganic N, leaf N, and leaf C and reduced leaf C:N, C:P, and N:P ratios. Leaf N:P was positively related to N addition gradient. Leaf C:P and leaf N:P were significantly negatively related to P addition gradient. Although external N and P addition changed the value of leaf N:P, the ratio was always lower than 16 in all treatments. The influences of P addition on soil and plant mainly caused the increase in soil available P concentration. In addition, the N and P cycles in the soil–plant system were tightly coupled in P addition but decoupled in N addition condition. The nutrient stoichiometry of soil and leaf responded differently to continuous N and P addition gradients. These data suggested that the alpine grazing grassland was limited by P rather than N due to long-term N deposition and uniform fertilization. Moreover, increasing P addition alleviated P limitation. Therefore, the imbalanced N and P input could change the strategy of nutrient use of the grass and then change the rates of nutrient cycling in the alpine grassland ecosystem in the future.


Author(s):  
Marcin Trojan ◽  
Jan Taler ◽  
Krzysztof Smaza ◽  
Wojciech Wróbel ◽  
Piotr Dzierwa ◽  
...  

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