TY - JOUR
T1 - Long-term winter wheat cropping influenced soil organic carbon pools in different aggregate fractions of Chernozem soil
AU - Šeremešić, Srdjan
AU - Ćirić, Vladimir
AU - Djalović, Ivica
AU - Vasin, Jovica
AU - Zeremski, Tijana
AU - Siddique, Kadambot H.
AU - Farooq, Muhammad
N1 - Funding Information:
This study is part of the TR31072 project financially supported by the Ministry of Education, Science and Technological Development of the Republic of Serbia.
Publisher Copyright:
© 2020 Informa UK Limited, trading as Taylor & Francis Group.
PY - 2020
Y1 - 2020
N2 - In this study, the role of the different management strategies was investigated, to elucidate soil organic carbon (SOC) loss under the long-term winter wheat cropping. Soil samples from wheat-based cropping systems and native vegetation were analyzed to assess SOC, total nitrogen, water-stable aggregates, mean weight diameter, and the carbon management index. Tillage practices involved moldboard plowing and field cultivators. Differences in SOC contents between treatments were dependant on tillage intensity, biomass production, and fertilization. In the 0–20 cm layer, the highest SOC contents occurred in the > 2000 µm soil fraction that received 40 t ha–1 farmyard manure every fourth year and the lowest SOC content occurred in the 53–250 µm fraction in the unfertilized treatment. Manure application influenced SOC content and its distribution among soil aggregate fractions but did not affect water-stable aggregates. SOC was primarily enriched within the > 2000 µm aggregates, so their turnover is essential for SOC preservation. The carbon management index was highest in 20–40 cm soil depth, which emphasizes the importance of deeper soil layers in SOC conservation. In conclusion, declining SOC levels are related to tillage practices which could not be compensated by fertilization or crop rotation.
AB - In this study, the role of the different management strategies was investigated, to elucidate soil organic carbon (SOC) loss under the long-term winter wheat cropping. Soil samples from wheat-based cropping systems and native vegetation were analyzed to assess SOC, total nitrogen, water-stable aggregates, mean weight diameter, and the carbon management index. Tillage practices involved moldboard plowing and field cultivators. Differences in SOC contents between treatments were dependant on tillage intensity, biomass production, and fertilization. In the 0–20 cm layer, the highest SOC contents occurred in the > 2000 µm soil fraction that received 40 t ha–1 farmyard manure every fourth year and the lowest SOC content occurred in the 53–250 µm fraction in the unfertilized treatment. Manure application influenced SOC content and its distribution among soil aggregate fractions but did not affect water-stable aggregates. SOC was primarily enriched within the > 2000 µm aggregates, so their turnover is essential for SOC preservation. The carbon management index was highest in 20–40 cm soil depth, which emphasizes the importance of deeper soil layers in SOC conservation. In conclusion, declining SOC levels are related to tillage practices which could not be compensated by fertilization or crop rotation.
KW - carbon management index
KW - cropping system
KW - fertilization
KW - Water-stable aggregates
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U2 - 10.1080/03650340.2019.1711065
DO - 10.1080/03650340.2019.1711065
M3 - Article
AN - SCOPUS:85078634049
SN - 0365-0340
VL - 66
SP - 2055
EP - 2066
JO - Archives of Agronomy and Soil Science
JF - Archives of Agronomy and Soil Science
IS - 14
ER -