CAJ | 학술논문

为揭示底栖藻类对三峡库区消落带淹没初期土壤中不同形态磷的影响作用，开展了相关的模拟实验。结果表明，在模拟的底栖藻类影响条件下，消落带土壤中铝磷(Al-P)的含量在实验期间处于波动状态， Al-P相对于其余形态的磷更易于被藻类吸收利用，且与藻类生长存在密切相关，即底栖藻类生长状态较好时，土壤中Al-P呈现下降趋势；而生长状态较差时，土壤中Al-P又出现略微上升的趋势。在实验后期土壤中Al-P含量上升，可能是其余形态的磷转化而来。底栖藻类的生长对不同深度土壤中铁磷(Fe-P)的影响不同，其生长对2-4 cm层土壤的影响较大，而对其余层影响不大。不同深度土壤中闭蓄态磷(O-P)和钙磷(Ca-P)含量差异不明显。实验后期Fe-P、O-P和Ca-P含量一直呈现下降的趋势，只有Al-P在后期出现上升的趋势，说明在淹水条件和底栖藻类生物膜共同作用下，土壤磷的有效性提高，土壤中难溶性磷向易溶性磷转化。
위게시저서조류대삼협고구소락대엄몰초기토양중불동형태린적영향작용，개전료상관적모의실험。결과표명，재모의적저서조류영향조건하，소락대토양중려린(Al-P)적함량재실험기간처우파동상태， Al-P상대우기여형태적린경역우피조류흡수이용，차여조류생장존재밀절상관，즉저서조류생장상태교호시，토양중Al-P정현하강추세；이생장상태교차시，토양중Al-P우출현략미상승적추세。재실험후기토양중Al-P함량상승，가능시기여형태적린전화이래。저서조류적생장대불동심도토양중철린(Fe-P)적영향불동，기생장대2-4 cm층토양적영향교대，이대기여층영향불대。불동심도토양중폐축태린(O-P)화개린(Ca-P)함량차이불명현。실험후기Fe-P、O-P화Ca-P함량일직정현하강적추세，지유Al-P재후기출현상승적추세，설명재엄수조건화저서조류생물막공동작용하，토양린적유효성제고，토양중난용성린향역용성린전화。
To study the effects of benthic algae on the phosphorus (P) fractions in the submerged soils in wa-ter-level-fluctuating zone of the Three Gorges Reservoir (TGR), simulated experiments were conducted under indoor conditions. The results indicated that benthic algae utilized more AI-P compared with other forms of P, and the growth of the algal was inversely related to the AI-P content that the Al-P content decreased when the conditions were suitable for algal growth. Moreover, benthic algae variously affected the iron-phosphorus (Fe-P) in different layer of soil. Ben-thic algae had the greatest effects on Fe-P on 2-4 cm layer. In addition, the contents of O-P and Ca-P in different soil depths showed no significantly changes. In the late period of this experiment, the contents of Fe-P, O-P and Ca-P all showed a declining trend whereas Al-P showed a sign of increasing. Impoundment of TGR and benthic algae biofilm significantly increased P availability in the submerged soil and enhanced the transformation of inorganic-P into more soluble fractions.