河道疏浚底泥农用对土壤及水稻生长的影响

Discussion on the influence of agricultural use of river dredged sediment on the soil and rice growth

通过对河道疏浚底泥的成分进行分析,合理判断疏浚底泥对水稻生长造成的影响,为提高底泥资源利用率提供科学合理的建议。在本试验中,分为无污染底泥和有污染底泥2组,对两份底泥样本以及所选择的土壤中的有机物和重金属进行分析。通过上述试验,可以得出以下结论:第一,不同污染底泥农用对土壤性状的影响主要表现为底泥比例与有机物质、碱解氮以及有效磷三者含量之间呈现出正比关系。第二,不同底泥对于水稻产量将会带来带来一定的影响。第三,无论底泥是否有无污染,底泥比例与水稻种重金属Cu含量呈现出相反的关系。

Through the analysis of the composition of river dredged sediment,the impact of dredged sediment on rice growth was reasonably judged,and scientific and reasonable suggestions were provided to improve the utilization rate of sediment resources.In this experiment,two sediment samples and organic matter and heavy metals in the selected soil were analyzed,which were divided into two groups:non-polluted sediment and polluted sediment.Through the above experiments,the following conclusions could be drawn:First,the effects of different polluted sediments on soil properties were mainly manifested in the positive relationship between sediment proportion and organic matter,alkali-hydrolyzed nitrogen and available phosphorus.Secondly,different sediments would have a certain impact on rice yield.Thirdly,no matter whether the sediment was contaminated or not,the ratio of sediment to the content of heavy metal Cu in rice seeds showed an opposite relationship.