秦淮河底泥投放对盆栽前后土壤养分含量的影响

以秦淮河南京市区段疏浚底泥为研究对象,将底泥按不同的比例进行土地投放,并进行盆栽试验,分析种植前后混合土样中的有机质、氮、磷、钾以及重金属含量的变化情况。盆栽试验结果表明,底泥中大量有机质分解将会增加混合土壤中有机质、氮和磷等养分的含量,施用后可以明显提高土壤有机质和氮含量,有利于培肥改土。综合速效钾与5种重金属元素对于小麦生长的影响,泥土比为1：3时底泥与农田土壤混合能达到最理想状态,按照这个比例将秦淮河底泥添加到农田中,在一定程度上能够促进小麦的生长。

Effects of Applying the Sediments of Qinhuai River on Soil Nutrient Content in Potted Plants

With the sediment collected from Qinhuai River in Nanjing as the research objects,the sediments were put into the potted plants by different proportion.The changes of organic matter,nitrogen,phosphorus,potassium and the content of heavy metals in mixed soil before and after planting were analyzed.Pot experiment results showed that large quantities decomposition of organic matter in the sediment would increase the content of organic matter,nitrogen and phosphorus and other nutrients in the mixed soil.The org...