Next Article in Journal
Military Training Areas as Semicommons: The Territorial Valorization of Quirra (Sardinia) from Easements to Ecosystem Services
Previous Article in Journal
Empirical Modeling Analysis of Potential Commute Demand for Carsharing in Shanghai, China
Open AccessArticle

Mineralization Patterns of Maize Straw in Fluvio-Aquatic Soil as Determined by Isotopic Traces

1
College of Life Science and Agronomy, Zhoukou Normal University, Zhoukou 466001, China
2
National Key Laboratory of Wheat and Maize Crop Science, Agricultural College of Henan Agricultural University, Zhengzhou 450002, China
*
Authors to whom correspondence should be addressed.
Sustainability 2020, 12(2), 621; https://doi.org/10.3390/su12020621
Received: 18 December 2019 / Revised: 13 January 2020 / Accepted: 13 January 2020 / Published: 15 January 2020
(This article belongs to the Section Sustainable Agriculture, Food and Wildlife)
The mineralization of plant residues results in changes in soil C and N. However, it is difficult to determine the origins of C and N from either soil organic matter mineralization or residue decomposition using traditional methods. An incubation experiment containing two treatments (blank soil (BS) and soil with 6% maize straw (MS)) was conducted to assess the contributions of maize straw to gas emissions, and to soil organic carbon (SOC) and total nitrogen (TN) using isotopic tracers. About 11.5% of maize straw C was sequestered in soil, the cumulative amount of C emitted from MS was 2.5-fold higher than that in BS treatment. A positive priming effect of maize straw on native SOC in the first 14 days was observed, and then became negative, indicating the potential for a positive balance of SOC storage. Cumulative N2O emissions in MS markedly decreased by 22.4% compared with BS, and the loss of N via N2O in MS was approximately 3.3%. Maize straw significantly increased soil TN and contributed 15.8% to TN at day 120. Our study clearly demonstrated that the different dynamics of 13C and 15N in the soils and gases indicated differences of maize straw C and N during decomposition. Maize straw C preferred to contribute to CO2 emissions, while maize straw N contributed more to soil TN. View Full-Text
Keywords: CO2 emissions; isotopic signature; N2O emissions; priming effect; soil organic matter CO2 emissions; isotopic signature; N2O emissions; priming effect; soil organic matter
Show Figures

Figure 1

MDPI and ACS Style

Zhu, L.; Chen, J.; Li, L.; Zhang, F.; Liu, T. Mineralization Patterns of Maize Straw in Fluvio-Aquatic Soil as Determined by Isotopic Traces. Sustainability 2020, 12, 621.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop