ACTA AGRICULTURAE BOREALI-SINICA ›› 2019, Vol. 34 ›› Issue (S1): 190-196. doi: 10.7668/hbnxb.20190163

Special Issue: Sweet pepper

• Resource and Environment·Plant Protection • Previous Articles     Next Articles

Comparison of Daily Variation of CO2 Emission Flux in Sweet Pepper Ridge and Ridge Embedded Substrate Cultivation in the Facility

LI Baoshi, LIU Wenke, LI Zonggeng, ZHANG Yubin, ZHA Lingyan, ZHOU Chengbo, SHAO Mingjie   

  1. Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Key Laboratory of Energy Conservation and Waste Management of Agricultural Structures, Ministry of Agriculture, Beijing 100081, China
  • Received:2019-03-17 Published:2019-12-28

Abstract: In order to explore the CO2 emissions and the characteristic of daily emissions variation of sweet pepper seedlings in the new cultivation mode, and to put forward that the optimal cultivation model of reducing emissions of vegetables under the new cultivation mode. Based on static box-gas chromatography technology which was used for the continuous determination of gas in-growing areas of three cultivation modes soil cultivation in-line substrate cultivation (SSC) standard ridges, SSC dwarf ridges, and the whole ridge of sown cultivation and ridge cultivation, SSC standard ridges, and SSC dwarf ridges were continuously taken. The results showed that the CO2 emission fluxes at the seedling stage of facility sweet pepper presented a single-peak pattern during the measurement period, which was consistent with the variation trend of indoor air temperature and the temperature at a depth of 5 cm under the surface. CO2 emission fluxes showed a phenomenon of high day and low night. In the daytime, the average CO2 emission fluxes in the rows of soil rows were the highest,325 mg/(m2 · h), and the average CO2 emission fluxes in the rows of SSC standard rows were the lowest,164 mg/(m2 · h). At night, the average emission fluxes of CO2 at the ridge of the soil row were the highest,110 mg/(m2 · h), and the average emission fluxes of CO2 at the ridge of the SSC low row were the lowest,78 mg/(m2 · h). The diurnal variation of CO2 emission fluxes in soil rows fluctuated greatly, and the diurnal variation of CO2 emission fluxes in SSC cultivation were relatively stable. In addition, the diurnal variation of root zone temperature of the three cultivation treatments tended to be consistent, and the peak value lagged behind the indoor air temperature for 1-3 h.In summary, SSC cultivation mode is beneficial to the emission reduction effect of facility vegetables, and has promising prospect for the cultivation technology of facility vegetables in solar greenhouse.

Key words: Facility vegetable, CO2, Emission flux, Daily change, Substrate culture

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Cite this article

LI Baoshi, LIU Wenke, LI Zonggeng, ZHANG Yubin, ZHA Lingyan, ZHOU Chengbo, SHAO Mingjie. Comparison of Daily Variation of CO2 Emission Flux in Sweet Pepper Ridge and Ridge Embedded Substrate Cultivation in the Facility[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2019, 34(S1): 190-196. doi: 10.7668/hbnxb.20190163.

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