文献类型： 外文期刊

作者： Mustafa, Adnan ¹ ; Frouz, Jan ² ; Naveed, Muhammad ³ ; Zhu Ping ⁴ ; Sun Nan ¹ ; Xu Minggang ¹ ; Nunez-Delgado, Avelino ⁵ ;

作者机构： 1.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Natl Engn Lab Improving Qual Arable Land, Beijing 100081, Peoples R China

2.Czech Acad Sci, Biol Ctr, SOWA RI, Ceske Budejovice 37005, Czech Republic

3.Univ Agr Faisalabad, Inst Soil & Environm Sci, Faisalabad 38040, Pakistan

4.Jilin Acad Agr Sci, Inst Agr Resources & Environm, Changchun 130124, Peoples R China

5.Univ Santiago Compostela, Engn Polytech Sch, Dept Soil Sci & Agr Chem, Campus Univ Lugo, Santiago, Spain

关键词： Mollisol; Pig manure; Fertilization; SOC fractionation; Mineralization; Aromaticity

期刊名称：ENVIRONMENTAL RESEARCH （ 影响因子：8.431； 五年影响因子：8.399 ）

ISSN： 0013-9351

年卷期： 2022 年 205 卷

页码：

收录情况： SCI

摘要： Long-term fertilization has shown a high relevance as regards soil organic carbon (SOC) sequestration, but the degree of stability of the sequestered SOC has not been widely studied up to now. Using physical fractionation combined with laboratory incubation and NMR spectroscopy, we evaluated the differences in SOC stability caused by long-term fertilization. Four SOC fractions were isolated and examined for contents and chemical composition and cumulative amount of CO2-C respired from the fractions under six fertilization treatments: control (CK); balanced inorganic fertilization (NPK); NPK combined with pig manure (MNPK); NPK combined 1.5 times of pig manure (1.5MNPK); and NPK combined with high amount of manure (M2NPK). The highest contents of SOC were recorded for the coarse particulate organic carbon (cPOC) fraction, ranging from 17.25 to 30.47 g kg-1 under CK and M2NPK. The highest cumulative amount of CO2-C was released from the cPOC fraction under manure treatments (M2NPK and 1.5NPKM), which was 56 and 43% higher than that from CK, whereas the lowest amount of CO2-C was released from the mineral associated-C (MOC) fraction under the same treatments, being 65 and 49% higher than that released from CK, suggesting low SOC stability in cPOC and high SOC stability in MOC fractions. However, manure treatments (M2NPK and 1.5NPKM) greatly lowered the specific amount of C-mineralized (C-mineralized per unit total SOC) in fractions and whole soil, suggesting the ability of manure to accumulate more SOC by reducing SOC losses. Moreover, carbonyl-C was found to be the form of SOC experiencing major degree of sequestration under current fertilization practices. The SOC stability indices; aromaticity index (AI), hydrophobicity index (HI) and alkyl-C/O-alkyl-C were found to be higher in manure treated plots further suggesting higher stability of SOC under manure addition. Thus, long-term manure combined with mineral fertilizers would enhance SOC stability through minimizing SOC losses and promoting accumulation of stable C forms in a Chinese Mollisol.