Long‐term manure application enhances organic carbon and nitrogen stocks in Mollisol subsoil

Subsoils contain half of the total soil organic carbon (SOC) that is supposed to be relatively more persistent than that present in the topsoil. Improving SOC and total nitrogen (TN) stocks in croplands is crucial to mitigate climate change and ensuring food security. However, our insight into how t...

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Bibliographic Details
Published in:Land degradation & development 2023-02, Vol.34 (3), p.815-832
Main Authors: Abrar, Muhammad Mohsin, Shah, Syed Atizaz Ali, Sun, Nan, Mehmood, Khalid, Aziz, Tariq, Waqas, Muhammad Ahmed, Luo, Yiqi, Zhou, Baoku, Ma, Xingzhu, Xu, Minggang, Mustafa, Adnan
Format: Article
Language:English
Subjects:
Agricultural land
Agricultural production
animal manure
Cereal crops
Climate change
Climate change mitigation
climatic variables
Crop production
Crop yield
Cropping systems
Crops
Fertilizers
Food security
Grain
grain yield
Manures
mineral fertilization
Mineral fertilizers
Nitrogen
nitrogen stock
Organic carbon
Organic soils
SOC sequestration
soil profile
Soil profiles
Soil properties
Soybeans
Subsoils
Topsoil
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Summary:Subsoils contain half of the total soil organic carbon (SOC) that is supposed to be relatively more persistent than that present in the topsoil. Improving SOC and total nitrogen (TN) stocks in croplands is crucial to mitigate climate change and ensuring food security. However, our insight into how the management practices and climatic variables influence stocks of SOC and TN, and crop grain yields in the soil profile is limited. In this study, we assessed the long‐term impacts of mineral and manure fertilizers on SOC and TN stocks at soil profile levels (up to 100 cm), and cropping system (wheat–maize–soybean) grain yields. Results indicated that in the top 0–40‐cm layers SOC and TN stocks were the highest in manure plus mineral fertilizers (MNPK) compared with control, that is, non‐fertilized control (CK). Conversely, compared with NPK, sole application of manure (M) clearly increased SOC stocks by 19%, 40%, and 39% and TN stocks by 51%, 105%, and 116% in 40–60, 60–80, and 80–100 cm, respectively (p 
ISSN:1085-3278
1099-145X
DOI:10.1002/ldr.4498