CAJ | 학술논문

采用静态箱—红外 CO2分析法研究了烟田垄体土壤呼吸、土壤微生物呼吸和垄间土壤呼吸在烤烟生长期的变化特征以及垄体土壤呼吸组分的贡献率，估算了烤烟生长期烟田生态系统碳平衡。结果表明，受烤烟生长和土壤温度的影响，垄体土壤呼吸速率具有明显的生长期变化特征，还苗期与伸根期土壤呼吸速率增长较慢，后期土壤呼吸速率逐步增大，在移栽后第107天达到最大值C 256.8 mg/(m2·h)。土壤微生物与垄间土壤呼吸速率在烤烟生长期变化较小。垄体土壤呼吸及其组分和垄间土壤呼吸在10 cm土层温度的Q10值大小顺序为：根系呼吸>垄体土壤呼吸>土壤微生物呼吸>垄间土壤呼吸。整个烤烟生长期根系呼吸与土壤微生物呼吸占垄体土壤呼吸的均值分别为44.2%、55.8%，净初级生产力碳固定量C 2975.9 kg/hm2，土壤异养呼吸碳释放量C 1409.1 kg/hm2，烟田生态系统净碳输入C 1566.8 kg/hm2。
채용정태상—홍외 CO2분석법연구료연전롱체토양호흡、토양미생물호흡화롱간토양호흡재고연생장기적변화특정이급롱체토양호흡조분적공헌솔，고산료고연생장기연전생태계통탄평형。결과표명，수고연생장화토양온도적영향，롱체토양호흡속솔구유명현적생장기변화특정，환묘기여신근기토양호흡속솔증장교만，후기토양호흡속솔축보증대，재이재후제107천체도최대치C 256.8 mg/(m2·h)。토양미생물여롱간토양호흡속솔재고연생장기변화교소。롱체토양호흡급기조분화롱간토양호흡재10 cm토층온도적Q10치대소순서위：근계호흡>롱체토양호흡>토양미생물호흡>롱간토양호흡。정개고연생장기근계호흡여토양미생물호흡점롱체토양호흡적균치분별위44.2%、55.8%，정초급생산력탄고정량C 2975.9 kg/hm2，토양이양호흡탄석방량C 1409.1 kg/hm2，연전생태계통정탄수입C 1566.8 kg/hm2。
In order to investigate the variations of soil respiration rate during flue-cured tobacco growth period and carbon balance of tobacco field ecosystems, a closed chamber technique (infrared CO2 analyser) was used to determine variations of respiration rate of the ridge soil, the ridge soil without roots (soil microbial) and the soil between ridges. The contribution of root respiration to the ridge soil respiration was analyzed and the carbon balance of tobacco field ecosystems was estimated. The results showed that during the flue-cured tobacco growth period, the ridge soil respiration was affected by flue-cured tobacco growth and soil temperature, displaying a significant seasonal variation. During the early growth period, the soil respiration rate increased slowly, and then it increased gradually, with a peak occurring on the 107th day C 256.8 mg/(m2·h) after tobacco seedling transplanting. Seasonal variation of respiration rate of the ridge soil without roots and the soil between ridges was not significant. The order of Q10 value of soil temperature at 10 cm depth with the ridge soil respiration with its components and respiration of the soil between ridges was root respiration>the ridge soil respiration>soil microbial respiration> the soil between ridges respiration. During the whole growth period, the contribution of root respiration to the ridge soil respiration was 44.2%, while the soil microbial respiration was 55.8%. In the flue-cured tobacco fields, the net primary productivity carbon was C 2975.9 kg/hm2, and soil heterotrophic respiration to release carbon was C 1409.1 kg/hm2 and the net ecosystem carbon budget was C 1566.8 kg/hm2.