Yuan Ye, Liu Chang-hong, Dai Xiao-qin, Wang Hui-min
Ying Yong Sheng Tai Xue Bao. 2015 Jan;26(1):147-54.
In this study, the CO2 and CH4 fluxes in the first year after land use conversion from paddy rice to vegetables were measured by static opaque chamber and gas-chromatograph (GC) method to investigate the land conversion effects on soil CO2 and CH4 emissions. Our results showed that the differences in CO2 fluxes depended on the vegetable types, growing status and seasons. The CO2 flux from the vegetable field was greater than that from the paddy rice field when cowpea was planted, but was lower when pepper was planted. The CH4 flux significantly decreased from 6.96 mg C . m-2 . h-1 to -0.004 mg C . m-2 . h-1 with the land use conversion from rice to vegetables.The net carbon absorption ( CO2 + CH4) of the vegetable fields was 543 kg C . hm-2, significantly lower than that (3641 kg C . hm-2) of the rice paddies. However, no significant difference was found in their global warming impact. In addition, soil carbon content increased in vegetable fields compared to the paddy rice fields after a year of conversion, especially in the 10-20 cm soil layer.
在本研究中，采用静态不透明箱和气相色谱（GC）法测量了从水稻田转变为蔬菜地后的第一年中的二氧化碳和甲烷通量，以研究土地转变对土壤二氧化碳和甲烷排放的影响。我们的结果表明，二氧化碳通量的差异取决于蔬菜类型、生长状况和季节。种植豇豆时，蔬菜地的二氧化碳通量大于稻田，但种植辣椒时则较低。随着土地利用从水稻转变为蔬菜，甲烷通量从6.96毫克碳·平方米·小时显著降至-0.004毫克碳·平方米·小时。蔬菜地的净碳吸收量（二氧化碳+甲烷）为543千克碳·公顷，显著低于稻田的净碳吸收量（3641千克碳·公顷）。然而，它们的全球变暖影响没有显著差异。此外，转变一年后，与稻田相比，蔬菜地的土壤碳含量增加，特别是在10-20厘米土层。
