Abstract: In order to study the effects of ocean soil conditioner, this paper carried out field comparative experiments to study the effects of 3 ocean soil conditioners: shrimp peptide, fish protein and algae fertilizers on soil physicochemical properties, flue-cured tobacco growth and yield. The results showed that applying shrimp peptide fertilizer 55 d after transplanting could effectively improve soil hydrolysis nitrogen and available potassium contents, but had no significant effect on growth and yield of flue-cured tobacco; applying fish protein fertilizer could effectively improved the hydrolysis nitrogen, available phosphorus and available potassium level at  55 d, and also significantly increased the root system activity, maximum length of middle leaves and dry matter accumulation. Its yield and value of cured leaves were increased by 27.79% and 29.84%, respectively， as compared with the control treatment; applying algae fertilizer could significantly reduced the soil bulk density at  75 d, and effectively improved the hydrolysis nitrogen, available phosphorus and available potassium level at 55 d, and also obviously increased the maximum length of middle leaves and dry matter accumulation. Its yield and value of cured leaves were increased by 11.75% and 20.05%, respectively，  compared with the control treatment. In summary, applying fish protein fertilizer and algae fertilizer could improve the soil fertility at certain degree, effectively promote the growth of flue-cured tobacco, and significantly increase tobacco leaf yield.

Key words: ocean soil conditioner, soil, flue-cured tobacco, physicochemical property, biological characteristic, yield

摘要： 为研究海洋类土壤改良剂的作用效果，采用田间对比试验，分析了虾肽肥、鱼蛋白肥、海藻肥3种海洋类土壤改良剂对土壤理化性状及烤烟生长和产量的影响。结果表明：施用虾肽肥可于移栽后55 d有效提高土壤碱解氮、速效钾含量，但对烤烟生长和产量无明显影响；施用鱼蛋白肥可显著提升55 d时土壤碱解氮、有效磷、速效钾水平，显著提高烟株根系活力、中部叶最大叶长、干物质积累量，其烤后烟叶产量、产值分别较对照提高27.79%、29.84%；施用海藻肥可明显降低75 d时土壤容重，于55 d显著提升土壤碱解氮、有效磷、速效钾水平，显著提高中部叶最大叶长、干物质积累量，其烤后烟叶产量、产值分别较对照提高11.75%、20.05%。综上，施用鱼蛋白肥、海藻肥可在一定程度上改良土壤，有效促进烤烟生长，显著提高烟叶产量。

关键词: 海洋类土壤改良剂, 土壤, 烤烟, 理化性状, 生物特性, 产量