| 何 锐，魏晶晶，张轶婷，宋世威，苏 蔚，刘厚诚.不同浓度营养液添加海藻肥对生菜产量及品质的影响[J].广东农业科学,2019,46(10):56-62 |
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不同浓度营养液添加海藻肥对生菜产量及品质的影响 |
| Effect of Seaweed Extract Added into DifferentConcentrations of Nutrient Solution on theYield and Quality of Hydroponic Lettuce |
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| DOI：10.16768/j.issn.1004-874X.2019.10.009 |
| 中文关键词: 生菜 海藻肥 营养液浓度 抗氧化能力 可溶性糖 |
| 英文关键词: lettuce seaweed fertilizer nutrient solution concentration antioxidant ability quality |
| 基金项目:国家重点研发计划项目（2017YFD0701504）；广州市科技计划项目（201704020058，201704020006） |
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| 中文摘要: |
| 【目的】研究不同浓度营养液添加稀释 1 000 倍海藻肥对生菜产量和品质的影响，以期为生菜的
设施高效栽培提供参考。【方法】采用水培试验，设置 4 个营养液处理：1/2 倍霍格兰营养液（CK）、1/2 倍霍
格兰营养液 +1 000 倍海藻肥（T1）、3/8 倍霍格兰营养液 +1 000 倍海藻肥（T2）、1/4 倍霍格兰营养液 +1 000
倍海藻肥（T3）。【结果】相比于不添加海藻肥的 1/2 倍霍格兰营养液（CK），T1、T2 处理在鲜质量上无显著
差异，但显著增加干物质的积累和光合色素含量。在各浓度营养液添加海藻肥能提高生菜多酚、类黄酮和可溶
性糖含量，降低硝酸盐含量，尤其是 T2、T3 处理对生菜的品质提升效果更佳。T2、T3 处理可溶性糖含量较 CK
显著提高，分别提高 40% 和 32.06%，硝酸盐含量则分别降低 42.9% 和 42.59%，多酚含量分别增加 65.99% 和
65.06%，DPPH 自由基清除率分别提高 72.49% 和 75.77%。与 CK 相比，3/8 霍格兰营养液添加海藻肥能够保持
生菜生长不受影响 , 干物质含量增加；而在 1/4 霍格兰营养液添加海藻肥，生菜鲜质量较 CK 降低 22.34%。【结
论】T2、T3 处理对生菜产量和品质提升效果较好。综合考虑生物量与施用成本，T2 处理为比较适合水培生菜的
高效优质栽培。 |
| 英文摘要: |
| 【Objective】1000 times diluent of seaweed extract (SWE) was added into different concentrations of
Hoagland solutions to investigate the effects on the yield and quality of hydroponic lettuce and provide references for the
highly effective cultivation of lettuce. 【Methods】Water culture test was conducted and 4 treatments were designed: 1/2
Hoagland solution (CK); 1/2 Hoagland solution + SWE (T1); 3/8 Hoagland solution + SWE (T2); 1/4 Hoagland solution
+ SWE (T3). 【Results】 Compared with CK, T1 and T2 showed no significant difference in fresh weight, but significantly
increased dry weight and photosynthetic pigment content. The polyphenol, flavonoids and soluble sugar content in lettuce
increased while nitrate content decreased in 3 SWE treatments, especially T2 and T3 could better improve the quality
of lettuce. Compared with CK, under T2 and T3, soluble sugar content significantly increased by 40% and 32.06%,
respectively, while nitrate content decreased 42.9% and 42.59%, respectively, and the polyphenol content increased by 65.99% and 65.06%, while DPPH free radical scavenging rate increased by 72.49% and 75.77%, respectively. Compared with
CK, the fresh weight of lettuce was not affected by adding seaweed fertilizer into 3/8 Hoagland nutrient solution, while the fresh
weight of lettuce decreased 22.34% by adding seaweed fertilizer into 1/4 Hoagland nutrient solution.【Conclusion】T2 and T3
can better improve the yield and quality of lettuce. Taking full account of biomass and application costs, 3/8 concentration of
Hoagland solution with 1000 times diluent of seaweed extract (T2) might be optimal for the high-efficiency and high-quality
cultivation of hydroponic lettuce. |
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