CAJ | 학술논문

采用电缆加热水浴升温的方法,研究了土壤温度升高对湿草甸小叶章碳、氮累积的影响,对比分析了淹水和非淹水条件下土温升高的相对影响程度.经过一个生长季,升温处理小叶章地上和地下部位生物量分别平均较对照增加67.24%和48.83%,而升温与淹水的交互作用下二者则分别平均增加45.21%和78.13%.土温升高显著提高了小叶章植株的碳、氮累积量,而降低了其地上和地下部位的C/N,升温处理植株碳、氮累积量分别较对照平均增加48.90%和104.20%,而地上和地下部位C/N则分别平均下降8.44%和5.26%,升温与淹水的交互作用显著促进了地上部位的碳、氮累积.结果表明,1～3℃的土温升高显著促进了小叶章的生物量及碳、氮累积,并将对湿地系统的碳固定过程造成影响.
채용전람가열수욕승온적방법,연구료토양온도승고대습초전소협장탄、담루적적영향,대비분석료엄수화비엄수조건하토온승고적상대영향정도.경과일개생장계,승온처리소협장지상화지하부위생물량분별평균교대조증가67.24%화48.83%,이승온여엄수적교호작용하이자칙분별평균증가45.21%화78.13%.토온승고현저제고료소협장식주적탄、담루적량,이강저료기지상화지하부위적C/N,승온처리식주탄、담루적량분별교대조평균증가48.90%화104.20%,이지상화지하부위C/N칙분별평균하강8.44%화5.26%,승온여엄수적교호작용현저촉진료지상부위적탄、담루적.결과표명,1～3℃적토온승고현저촉진료소협장적생물량급탄、담루적,병장대습지계통적탄고정과정조성영향.
To determine the effects of warming on carbon and nitrogen contents of Calamagrostis angustifolia, a warming experiment was conducted under flooded and non-flooded conditions in a typical C. angustifolia meadow wetland of Sanjiang Plain, Northeast China. Warming cables were used to simulate soil warming. During the growing season, aboveground and belowground biomass of C. angustifolia increased by 67.24% and 48.83% under warming treatment, and by 45.21% and 78.13%, respectively under the interaction of warming and flooding. Experimental warming significantly enhanced carbon and nitrogen accumulations of C. angustifolia, and reduced C/N of the aboveground and belowground parts. Under warming treatment, carbon and nitrogen accumulation increased by 48.90% and 104.2%, while C/N of the aboveground and belowground parts decreased by 8.44% and 5.26%, respectively. Moreover, carbon and nitrogen accumulation of aboveground parts showed a significant increase under the interaction of warming and flooding. 1-3℃ soil warming significantly increased the biomass and carbon and nitrogen accumulation of C. angustifolia, thus affecting the carbon sequestration in freshwater marsh ecosystems.