CAJ | 학술논문

为揭示不同土地利用方式转换下，生态系统碳储量变化特征以及其影响因素的变异特点，以西辽河农牧交错带农田和草原为研究对象展开了试验.通过对比草原与开垦、农田与退耕条件下，植物体地上地下生物量碳、土壤有机碳蓄积等特征的差异，确定了多种土地利用方式与生态系统碳平衡之间的关系，结果表明农田开垦会导致植物的地下光合积累量迅速下降；农田经过退耕还草，能明显的提高植被地下部分光合积累量.新开农田高出还草草地372.8%，多年耕种农田高出还草草地357.7%，这表明生态系统的地上光合积累量的增加有助于提高土壤有机碳的输入量；而植物体的光合积累量与植物体碳密度存在一定的正相关性.
위게시불동토지이용방식전환하，생태계통탄저량변화특정이급기영향인소적변이특점，이서료하농목교착대농전화초원위연구대상전개료시험.통과대비초원여개은、농전여퇴경조건하，식물체지상지하생물량탄、토양유궤탄축적등특정적차이，학정료다충토지이용방식여생태계통탄평형지간적관계，결과표명농전개은회도치식물적지하광합적루량신속하강；농전경과퇴경환초，능명현적제고식피지하부분광합적루량.신개농전고출환초초지372.8%，다년경충농전고출환초초지357.7%，저표명생태계통적지상광합적루량적증가유조우제고토양유궤탄적수입량；이식물체적광합적루량여식물체탄밀도존재일정적정상관성.
For revealing the characteristic of the ecosystem carbon variation and the feature of the influence factors in the case of the different ways of conversion,regarded the farmland of Xiliao River and grassland as the research object for experiment. By Comparing the characteristics of biomass carbon, soil organic carbon accumulation between the grassland and reclamation, the farmland and abandoned farmland, ascertain the relationship between the various ways of land utilization and the ecosystem carbon balance, and concluded the following conclusions:Compared with the accumulation of photosynthetic in the 7 types of land utilization found that the reclaimed farmland cause a decline in the photosynthetic accumulation of underground plant rapidly;and contrast the accumulation of photosynthetic of underground part between the farmland and grassland, it can known the farmland which return to woodland can significantly improve the photo-synthetic accumulation of the underground part of the vegetation. Then, contrast the photosynthetic accumulation of overground part, can know the newly cultivated farm higher than the land returning to grassland 372.8%, and the perennial cultivated farmland higher than the grassland 357.7%,the data showed that the overground photosynthetic accumulation of the ecosystem is conducive to improve the input of the soil organic carbon;and the relationship between the plant photosynthetic carbon accumulation and plant density is the positive correlation.