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Response Surface Methodology for Development of Nutrient Solution Formula for Hydroponic Lettuce Based on the Micro-Elements Fertilizer Requirements at Different Growth Stages

文献类型： 外文期刊

作者： Gong, Binbin 1 ; Ren, Xiaowei 1 ; Hao, Wenyu 1 ; Li, Jingrui 1 ; Hou, Shenglin 4 ; Yang, Kun 1 ; Wu, Xiaolei 1 ; Gao, Hongbo 1 ;

作者机构： 1.Collaborat Innovat Ctr Vegetable Ind Hebei, Baoding 071001, Peoples R China

2.Key Lab North China Water Saving Irrigat Engn, Baoding 071001, Peoples R China

3.Hebei Agr Univ, Coll Hort, Baoding 071001, Peoples R China

4.Hebei Acad Agr & Forestry Sci, Shijiazhuang 050035, Peoples R China

关键词： hydroponics; lettuce; nutrient solution formula; response surface method

期刊名称：AGRONOMY-BASEL （ 影响因子：3.3； 五年影响因子：3.7 ）

ISSN：

年卷期： 2024 年 14 卷 6 期

页码：

收录情况： SCI

摘要： In order to precisely obtain the impact of nutritional elements on lettuce yield and quality, in the present study, a nutrient solution formula suitable for lettuce hydroponic production was development using response surface methodology based on the determination for micro-elements in three growth stages and taking the interaction between elements into account. Then, the formula was optimized and validated, aiming for the goal of improving lettuce yield and quality. The results showed that 200 healthy lettuce leaves contained similar amounts of macro-elements, and there was no significant difference in the unit content of micro-elements among the seedling, rosette, and harvest stages. Quadratic regression models between shoot fresh weight, SPAD value, soluble sugar content, Vc content, and nutrient content were established (R2 = 0.91, 0.95, 0.98, and 0.81, respectively). The optimal concentrations of P, K, Ca, and Mg obtained by multi-objective optimization of the quadratic regression models for fresh weight, SPAD value, soluble sugar content, and Vc content were 2.71 mmolL-1, 6.42 mmolL-1, 5.58 mmolL-1, and 7.11 mmolL-1, respectively. The nutrient solution formula (T1) was found to be the optimal nutrient solution formula for improving lettuce growth and quality. Overall, we developed a specific and targeted nutrient solution formulation for lettuce; this formulation not only meets lettuce's demand for nutrients, but also improves lettuce yield and quality, providing more choices for lettuce production in a region with high salts and high pH in the irrigation water.

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