CAJ | 학술논문

　　为了研究不同N沉降水平下，大气CO2浓度升高对三江平原小叶章群落土壤全磷、速效磷含量的影响。利用开顶气室(open-top chamber，OTC)，设置当前大气 CO2浓度(370μmol/mol)、中等 CO2浓度(550μmol/mol)和高 CO2浓度(700μmol/mol)3个 CO2浓度水平和不施氮[N1，0 g N/(m2·年)]、常氮[N2，4 g N/(m2·年)]、高氮[N3，8 g N/(m2·年)]3个施氮水平。结果表明：CO2浓度升高结合氮沉降连续运行2个生长季后，相同处理下，土壤全磷、速效磷的含量没有显著变化。各处理仅对0~10 cm土层土壤磷素含量影响明显，对下面2层土壤磷素含量无显著影响。在相同氮沉降水平下，0~10 cm土层土壤全磷、速效磷的含量随着大气CO2浓度的增加呈现出先增大后减小的变化趋势。氮的加入对土壤的全磷的含量没有显著影响、却减小了0~10 cm土层土壤速效磷的含量。土壤全磷的含量与土层深度密切相关，随着土层深度的增加而降低。
　　위료연구불동N침강수평하，대기CO2농도승고대삼강평원소협장군락토양전린、속효린함량적영향。이용개정기실(open-top chamber，OTC)，설치당전대기 CO2농도(370μmol/mol)、중등 CO2농도(550μmol/mol)화고 CO2농도(700μmol/mol)3개 CO2농도수평화불시담[N1，0 g N/(m2·년)]、상담[N2，4 g N/(m2·년)]、고담[N3，8 g N/(m2·년)]3개시담수평。결과표명：CO2농도승고결합담침강련속운행2개생장계후，상동처리하，토양전린、속효린적함량몰유현저변화。각처리부대0~10 cm토층토양린소함량영향명현，대하면2층토양린소함량무현저영향。재상동담침강수평하，0~10 cm토층토양전린、속효린적함량수착대기CO2농도적증가정현출선증대후감소적변화추세。담적가입대토양적전린적함량몰유현저영향、각감소료0~10 cm토층토양속효린적함량。토양전린적함량여토층심도밀절상관，수착토층심도적증가이강저。
An experiment was carried out with treatments different in atmospheric CO2 concentration level (370, 550, 700 μmol/mol) and nitrogen supply [0, 5, 10 g N/(m2·a)] on the OTC (Open Top Chamber) equipment for study the effect of nitrogen deposition and elevated atmospheric CO2 concentration to the content of the soil total phosphorus and available phosphorus element which were contain in the Deyeuxia angustifolia community in Sanjiang Plain. The results indicated that: elevated atmospheric CO2 concentrationcombined with nitrogen deposition consecutive run two growing season, there was no noticeable changing about the content of soil total phosphorus and available phosphorus on the same treatment; each treatment only affect soil phosphorus content in 0-10 cm layers had significant effect on soil phosphorus content below 2 layers. Along with the increasing of the CO2 concentration, the content of soil total phosphorus and available phosphorus in 0-10 cm layers appeared the tendency, as first increasing and then decreasing. The nitrogen added no significant effect on the soil total phosphorus content, but reduced available phosphorus content in the 0-10 cm layers. Soil total phosphorus content was closely related with soil depth, and decreased with the increase of soil depth.