腐植酸有机复合土壤改良剂改良港口疏浚底泥后的种植效果研究

Study on Planting Effect of Humic Acid Organic Compound Soil Conditioner on Shallow Sediment in Harbor

通过在干化后的港口疏浚底泥上添加以活化腐植酸、秸秆和有机菌肥为原料制备的腐植酸有机复合土壤改良剂(HMB)来种植番茄。研究不同配比的秸秆、腐植酸和菌肥对番茄生长情况的影响,并分析在不同条件下番茄株高和径粗的变化情况,以此来探讨改良剂的作用机制。结果表明,改良剂中秸秆、腐植酸和菌肥之间的配比对于番茄株高和径粗均有影响。其中,当改良剂腐植酸和菌肥的含量分别为0.2%和0.1%,并且秸秆/菌肥比为2.5时,土壤改良剂能最大激活腐植酸的作用。当土壤改良剂组合中秸秆、腐植酸和菌肥按0.625:0.125:0.25时为最佳比例,番茄的株高和径粗均显著高于对照组,证明改良港口疏浚底泥的种植效果良好,达到了绿化种植土的标准。

Humic acid organic compound soil amendment(HMB),which was prepared from activated humic acid,straw and organic bacteri-al manure,was added to the dried dredged sediment to plant tomatoes.The effects of different proportions of straw,humic acid and bacterial fertiliz-er on the growth of tomato were studied,and then the changes of plant height and diameter of tomato under different conditions were analyzed,so as to explore the mechanism of action of the improver.The results showed that the proportion of some elements,including straw,humic acid and bacterial fertilizer in the amendment,had influenced on the plant height and diameter of tomato,respectively.Among them,when the content of humic acid and bacterial manure and the ratio of straw to bacterial manure were 0.2%,0.1%,2.5,separately,HMB can active the effect of humic acid mostly.As the proportion of straw,humic acid and bacterial manure in the soil conditioner combination were 0.625:0.125:0.25,equal to best percent,the plant height and diameter of tomato were significantly higher than those of the control group,which proves that the planting effect of the improved port dredged sediment is prominent,reaching the standard of greening planting soil.