鄱阳湖典型堑秋湖土壤养分特征

Soil nutrient characteristics of typical cut-autumn lake in poyang lake

本研究选取鄱阳湖典型堑秋湖南矶湿地国家级自然保护区白沙,通过对白沙湖洲滩土壤样品的全氮(TN)、全磷(TP)、铵态氮(NH4+-N)、硝态氮(NO3--N)、有效磷(AP)等含量分析,探讨堑秋湖土壤氮磷养分特征,为湖泊的生态保护提供科学依据。研究结果表明:白沙湖洲滩土壤TN和TP含量变化范围分别为0.8-1.37mg·g-1、0.42-1.78mg·g-1;土壤NH4+-N、NO3--N和AP变化范围分别为0.213-1.12mg·kg-1、1.47-3.29mg·kg-1、0.3-1.19mg·kg-1,该湖土壤氮磷全量养分和速效养分均处于低水平状态,处于富营养化的低风险阶段。

In this study,Baisha,a typical Poyang lake cut and autumn,Hunan Ji wetland national nature reserve,was selected.By analyzing the contents of total nitrogen(TN),total phosphorus(TP),ammonium nitrogen(NH4+-N),nitrate nitrogen(NO3--N)and available phosphorus(AP)of soil samples of baisha lake and zhou beach,the nitrogen and phosphorus nutrient characteristics of soil in cut and autumn lake were discussed,which provided a scientific basis for the ecological protection of the lake.The results showed that the contents of TN and TP in Baishahuzhou beach soil varied from 0.8 to 1.37 mg·g-1 and from 0.42 to 1.78 mg·g-1,respectively.The variation ranges of soil NH4+-N,NO3--N and AP were 0.213-1.12mg·kg-1,1.47-3.29mg·kg-1 and 0.3-1.19mg·kg-1,respectively.The total nitrogen and phosphorus nutrients and available nutrients in the soil of the lake were at low levels,and were at a low risk stage of eutrophication.