| Characteristics of soil carbon emission under the model of raising geese in corn field in Tibet |
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| DOI：10.7606/j.issn.1000-7601.2022.01.23 |
| Key Words: Raising geese in corn field soil respiration soil temperature volume water content characteristics of soil carbon emission |
| Author Name | Affiliation | | YANG Hong | Resources & Environment College,Tibet Agriculture & Animal Husbandry University, Linzhi, Tibet 860000, China | | LIU Wenjie | Resources & Environment College,Tibet Agriculture & Animal Husbandry University, Linzhi, Tibet 860000, China | | LIU Heman | College of Agronomy,Xinyang Agriculture and Forestry University, Xinyang, Henan 464000, China | | CAO Lihua | College of Agronomy,Xinyang Agriculture and Forestry University, Xinyang, Henan 464000, China |
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| Abstract: |
| To explore the effect of raising geese in corn field production model on soil respiration rate of alpine farmland, our study applied an experiment to compare the difference of soil respiration rates under two treatments of raising geese in corn field (RGC) and conventional maize planting (CK)in the alpine farmland of southeast Tibet. The open circuit soil carbon flux measurement system was used for field measurement. The results showed: (1) An asymmetric “single peak” trend was found for the diurnal variation of soil temperature, soil volumetric moisture content and soil respiration rate probably due tohysteresis of respiration rate. (2) During the whole growth period, the soil respiration rate showed the order of RGC > CK, meaning integration of agriculture and animal husbandry could effectively improve the efficiency of soil carbon emission. However,based on the spatial variability (coefficient of variation: CK > RGC) and temperature sensitivity coefficient (Q10 value: CK (1.19~1.38) > RGC (1.12~1.30)), the production model of “raising geese in corn field” could effectively improve soil respiration and resist external drought ability of disturbance and reduction of soil temperature sensitivity in alpine region. (3) The bivariate model fitted by soil temperature and soil volume moisture explained 0.862~0.981 of the daily variation of soil respiration rate, indicating the change of soil respiration rate was very significantly response to the synergistic change of soil temperature and soil volume moisture, but the response degree of different measurement dates was different. (4) For the two treatments, the soil respiration rate was RGC > CK, but the coefficient of variation was CK >RGC, meaning the soil respiration of CK was more easily changed by the changes of external environment. It is beneficial to improve soil fertility and soil carbon stability and reduce soil respiration rate temperature sensitivity in the alpine region. |
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