Abstract
Carbon sequestration potential of agroforestry systems has attracted worldwide attention following the recognition of agroforestry as a greenhouse gas mitigation strategy. However, little is known about carbon stocks in poplar–maize intercropping systems in arid regions of China. This study was conducted in the temperate desert region of northwestern China, a region with large area of poplar–maize intercropping systems. The objective of this study was to assess biomass production and carbon stock under three poplar–maize intercropping systems (configuration A, 177 trees ha−1; configuration B, 231 trees ha−1; and configuration C, 269 trees ha−1). We observed a significant difference in the carbon stock of poplar trees between the three configurations, with the highest value of 36.46 t ha−1 in configuration C. The highest carbon stock of maize was achieved in configuration B, which was significantly higher than configuration A. The grain yield was highest in configuration A, but there was no significant difference from the other two configurations. In the soil system (0–100 cm depth), the total carbon stock was highest in configuration C (77.37 t ha−1). The results of this study suggest that configuration C is the optimum agroforestry system in terms of both economic benefits and carbon sequestration.
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Acknowledgments
This work was financially supported by the National Key Basic Research Program of China (2013CB956604), the National Natural Sciences Foundation of China (31300323) and the China Postdoctoral Science Foundation Funded Project (2014M552515). The study was carried out at Linze Inland River Basin Research Station.
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Xie, T.T., Su, P.X., An, L.Z. et al. Carbon stocks and biomass production of three different agroforestry systems in the temperate desert region of northwestern China. Agroforest Syst 91, 239–247 (2017). https://doi.org/10.1007/s10457-016-9923-1
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DOI: https://doi.org/10.1007/s10457-016-9923-1