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- Title
Soil organic carbon active fractions as early indicators for total carbon change under straw incorporation.
- Authors
Xu, Minggang; Lou, Yilai; Sun, Xiaolin; Wang, Wei; Baniyamuddin, Muhammad; Zhao, Kai
- Abstract
Changes in total organic C ( C), water-soluble organic C ( C), microbial biomass C ( C), C mineralization, particulate organic C ( C), labile organic C ( C), C management index (CMI), and C storage in surface Hapli-Ustic Cambisol (0-20 cm) under straw incorporation after both 2- and 10-year durations were investigated in a maize ( Zea mays L.) field experiment in northeast China, in order to examine the effectiveness of these active C fractions and CMI as early indicators for total C change. The treatments included straw removal (0%S), 50% of straw incorporation (50%S), and 100% of straw incorporation (100%S). Under the straw incorporation, C concentration and C storage did not significantly change under 2-year duration, while were significantly increased under 10-year duration. However, C, total C mineralization ( C), C, and C, and CMI were significantly increased under the straw incorporation even after only 2-year duration, and the responses were more significant after 10-year duration. There were positive correlations between all these C indicators with each other. Our findings demonstrate that the measured active C fractions (except for C) and CMI can provide an early indication of change in total soil organic C induced by straw incorporation.
- Subjects
CORN; BIOMINERALIZATION; EXPERIMENTAL agriculture; AGRICULTURAL experimentation; SOIL fertility
- Publication
Biology & Fertility of Soils, 2011, Vol 47, Issue 7, p745
- ISSN
0178-2762
- Publication type
Article
- DOI
10.1007/s00374-011-0579-8