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N-enriched biochar increases carbon, nitrogen, and phosphorus accumulation associated with changes in plant ecological stoichiometry in subtropical rice paddy fields

Published online by Cambridge University Press:  05 July 2023

Jie Hei
Affiliation:
Key Laboratory of Humid Subtropical Eco-geographical Process, Ministry of Education, Fujian Normal University, Fuzhou 350117, China Institute of Geography, Fujian Normal University, Fuzhou 350117, China
Xiaolei Yin
Affiliation:
Key Laboratory of Humid Subtropical Eco-geographical Process, Ministry of Education, Fujian Normal University, Fuzhou 350117, China Institute of Geography, Fujian Normal University, Fuzhou 350117, China
Weiqi Wang*
Affiliation:
Key Laboratory of Humid Subtropical Eco-geographical Process, Ministry of Education, Fujian Normal University, Fuzhou 350117, China Institute of Geography, Fujian Normal University, Fuzhou 350117, China
Jordi Sardans*
Affiliation:
CSIC, Global Ecology Unit CREAF-CSIC-UAB, 08913 Bellaterra, Catalonia, Spain CREAF. 08913 Cerdanyola del Vallès, Catalonia, Spain
Chun Wang
Affiliation:
Key Laboratory of Humid Subtropical Eco-geographical Process, Ministry of Education, Fujian Normal University, Fuzhou 350117, China Institute of Geography, Fujian Normal University, Fuzhou 350117, China
Xiaoxuan Chen
Affiliation:
Key Laboratory of Humid Subtropical Eco-geographical Process, Ministry of Education, Fujian Normal University, Fuzhou 350117, China Institute of Geography, Fujian Normal University, Fuzhou 350117, China
Akash Tariq
Affiliation:
State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China Cele National Station of Observation and Research for Desert-Grassland Ecosystems, Cele 848300, China
Fanjiang Zeng
Affiliation:
State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China Cele National Station of Observation and Research for Desert-Grassland Ecosystems, Cele 848300, China
Abdulwahed Fahad Alrefaei
Affiliation:
Department of Zoology, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
Josep Peñuelas
Affiliation:
CSIC, Global Ecology Unit CREAF-CSIC-UAB, 08913 Bellaterra, Catalonia, Spain CREAF. 08913 Cerdanyola del Vallès, Catalonia, Spain
*
Corresponding authors: Weiqi Wang; Email: wangweiqi15@163.com; Jordi Sardans; Email: j.sardans@creaf.uab.cat
Corresponding authors: Weiqi Wang; Email: wangweiqi15@163.com; Jordi Sardans; Email: j.sardans@creaf.uab.cat

Summary

N-enriched biochar can increase the accumulation of carbon (C), nitrogen (N), phosphorus (P), and biomass in rice plants. On the other hand, the biomass and C, N, and P contents of plant organs are important indicators to reflect plant C, N, and P storages. We established control, 4 t ha−1, and 8 t ha−1 N-enriched biochar treatment plots in a subtropical paddy field in China to investigate the effect of these treatments on C, N, and P storages, ecological stoichiometry in various rice plant organs, and their relationships with edaphic factors. The application of N-enriched biochar increased the biomass and storages of C, N, and P in rice roots, stems, leaves, and grains, mainly at 4 t ha−1. The application of N-enriched biochar decreased the C/N and C/P ratios of rice organs, but increased their N/P ratio. Changes in C/N were mainly due to the changes in storage, while N/P was positively correlated with N storage of stems, leaves, and grains and negatively correlated with P storage in roots. Pearson’s correlation analysis revealed that pH was negatively correlated, and soil N content was positively correlated with P storage in various organs of rice. In addition, soil P content and chlorophyll were positively correlated with N storage. In conclusion, we found that the application of N-enriched biochar improved plant N and P storage and stoichiometrical relations among rice organs.

Information

Type
Research Article
Copyright
© The Author(s), 2023. Published by Cambridge University Press

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