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Changes in soil carbon, nitrogen, and phosphorus contents, storages, and stoichiometry during land degradation in jasmine croplands in subtropical China

Published online by Cambridge University Press:  17 May 2021

Qiang Jin ,
Josep Peñuelas ,
Jordi Sardans Open the ORCID record for Jordi Sardans [Opens in a new window] ,
Estela Romero ,
Sicong Chen ,
Xuyang Liu ,
Shaoying Lin  and
Weiqi Wang
Qiang Jin
Affiliation:
Key Laboratory of Humid Subtropical Eco-geographical Process, Ministry of Education, Fujian Normal University, Fuzhou350007, China Institute of Geography, Fujian Normal University, Fuzhou350007, China
Josep Peñuelas
Affiliation:
CSIC, Global Ecology CREAF-CSIC-UAB, Bellaterra, 08193Barcelona, Catalonia, Spain CREAF, Cerdanyola del Valles, 08193Barcelona, Catalonia, Spain
Jordi Sardans*
Affiliation:
CSIC, Global Ecology CREAF-CSIC-UAB, Bellaterra, 08193Barcelona, Catalonia, Spain CREAF, Cerdanyola del Valles, 08193Barcelona, Catalonia, Spain Department of Environmental Sciences, Faculty of Meteorology, Environment and Arid Land Agriculture, King Abdulaziz University, P.O.Box 80216, Jeddah21589, Saudi Arabia
Estela Romero
Affiliation:
CSIC, Global Ecology CREAF-CSIC-UAB, Bellaterra, 08193Barcelona, Catalonia, Spain CREAF, Cerdanyola del Valles, 08193Barcelona, Catalonia, Spain
Sicong Chen
Affiliation:
Agriculture Bureau of Fuzhou City, Fuzhou350026, China
Xuyang Liu
Affiliation:
Key Laboratory of Humid Subtropical Eco-geographical Process, Ministry of Education, Fujian Normal University, Fuzhou350007, China Institute of Geography, Fujian Normal University, Fuzhou350007, China
Shaoying Lin
Affiliation:
Key Laboratory of Humid Subtropical Eco-geographical Process, Ministry of Education, Fujian Normal University, Fuzhou350007, China Institute of Geography, Fujian Normal University, Fuzhou350007, China
Weiqi Wang*
Affiliation:
Key Laboratory of Humid Subtropical Eco-geographical Process, Ministry of Education, Fujian Normal University, Fuzhou350007, China Institute of Geography, Fujian Normal University, Fuzhou350007, China
*
*Corresponding authors. Emails: wangweiqi15@163.com; j.sardans@creaf.uab.cat
*Corresponding authors. Emails: wangweiqi15@163.com; j.sardans@creaf.uab.cat
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Abstract

Soil degradation is characterized by loss of soil organic matter, decline in fertility, imbalance in elemental content, deterioration of soil structure, and overall a deterioration of soil environment. According to the classification method of Pieri et al. (1992), the soil is classified into different degradation classes by calculating the soil structural stability index (St) of each sample point. We aimed to investigate changes in the contents, storages and stoichiometry of soil carbon (C), nitrogen (N), and phosphorus (P) together with changes in soil physical traits along a soil degradation gradient in jasmine croplands in Fuzhou area (China). The content and storage of soil C and N decreased with increasing intensity of land degradation. Soil organic C content was 15.4%, 32.3%, and 38.8% lower, respectively, in the low, medium, and high degree of degradation soils, than in the nondegraded soils. The soil C:N ratio was 18.5% higher in soils in the middle degree of degradation than in the nondegraded soils. Compared with nondegraded soils, the bulk density of the degraded soils increased and water content decreased. The decrease of soil pH coupled with salinity (conductivity) and the loss of aggregate stability are the main traits that distinguish degraded from nondegraded soils. We also detected a general N and P deficiency that is aggravated by the degradation process. Unreasonable management easily leads to degradation associated with a loss of organic C and total soil nutrients, thus impairing even more a general N and P deficiency in this area. Therefore, higher inputs of organic fertilizer should be added to alleviate the lack of organic matter, and appropriate burial should be conducted to reduce nutrient loss. Moreover, a rise of N and P fertilizer application is also advisable.

Keywords

Soil degradation indexCarbonNitrogenPhosphorusStorageStoichiometryJasmine
Type
Research Article
Information
Experimental Agriculture , Volume 57 , Issue 2 , April 2021 , pp. 113 - 125
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Copyright
© The Author(s), 2021. Published by Cambridge University Press

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