Félicien Mununga Katebe, Iris Szekely, Michel Mpundu Mubemba, C. Burgeon, M. H. Jijakli
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To achieve this, two types of trials were conducted. The first was aimed at determining the quantities of organic matter to be used in the formulation of nutrient solutions. The second trial aimed to determine the optimal nitrogen concentration to be provided for hydroponic plant growth. Mineralization and/or anaerobic digestion of chicken manure were conducted for 7 days in 200 L barrels. For the first trial, nutrient solutions were created from three different concentrations of chicken manure (0.35%, 3.5%, and 7% dry matter—D.M.). These solutions were then used in bioponic rafts where total ammonia nitrogen (TAN) concentrations were fixed at 150 mg/L. For the second trial, D.M. was fixed at 2.5% for each tested modality, but TAN concentrations varied among them (i.e., 60, 90, and 120 mg/L TAN concentration). Modalities with low D.M. concentration (0.35%) and those with low TAN concentration (60 mg/L) resulted in higher yields than bioponic modalities receiving high concentrations of dry matter or TAN, respectively, for trials 1 and 2. Although the reference chemical solutions generate the greatest yields, bioponic systems operating with chicken manure present a good alternative for the cultivation of vegetables in developing countries with heavily contaminated soils. Indeed, bioponics allows for the production of vegetables in large quantities from animal waste, which does not pose health risks for human consumption. 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引用次数: 0
摘要
人类活动已使世界各地的水生、陆地和空中环境变性,特别是在卢本巴希,市场菜园的土壤已无法种植许多植物。因此,生物栽培可以成为无土栽培中生产无污染蔬菜的有效手段,不仅可以减少化肥用量,限制对农产品的污染,还能获得比露地栽培更高的产量。本研究的总体目标是采用一种新的生物栽培技术,利用鸡粪生产液态肥料,并将其用于浮筏系统上莴苣(Lactuca sativa var. Lucrecia)的有机水培。为此,进行了两类试验。第一项试验旨在确定营养液配方中使用的有机物数量。第二项试验旨在确定水培植物生长所需的最佳氮浓度。在 200 升的桶中对鸡粪进行了为期 7 天的矿化和/或厌氧消化。在第一次试验中,用三种不同浓度的鸡粪(0.35%、3.5% 和 7% 干物质-D.M.)制成营养液。然后将这些溶液用于总氨氮(TAN)浓度固定为 150 毫克/升的生物栽培筏。在第二次试验中,每种测试模式的干物质含量都固定为 2.5%,但总氨氮浓度各不相同(即总氨氮浓度分别为 60、90 和 120 毫克/升)。在试验 1 和 2 中,干物质浓度低(0.35%)和 TAN 浓度低(60 毫克/升)的模式的产量分别高于干物质或 TAN 浓度高的生物栽培模式。虽然参考化学溶液产生的产量最高,但使用鸡粪的生物栽培系统为土壤受到严重污染的发展中国家的蔬菜栽培提供了一个很好的替代方案。事实上,生物栽培可以利用动物粪便大量生产蔬菜,而且不会对人类健康造成危害。应在水培条件下对卢本巴希常见的当地蔬菜品种进行测试。
Bioponic Cultivation Using Chicken Droppings to Produce Lettuce Plants (Lactuca sativa rz) Uncontaminated by Trace Metals
Anthropogenic activities have denatured aquatic, terrestrial, and aerial environments throughout the world in general, and in Lubumbashi in particular, where market garden soils have become uncultivable for many plants. Thus, bioponics could be an effective means of producing uncontaminated vegetables in soilless cultivation, not only reducing the amount of fertilizer used and limiting contamination of agricultural produce but also achieving higher yields than in open-ground cultivation. The overall objective of this study was to implement a new bioponic technique for producing liquid fertilizer from chicken manure and utilize it in the organic hydroponic cultivation of lettuce (Lactuca sativa var. Lucrecia) installed on floating raft systems. To achieve this, two types of trials were conducted. The first was aimed at determining the quantities of organic matter to be used in the formulation of nutrient solutions. The second trial aimed to determine the optimal nitrogen concentration to be provided for hydroponic plant growth. Mineralization and/or anaerobic digestion of chicken manure were conducted for 7 days in 200 L barrels. For the first trial, nutrient solutions were created from three different concentrations of chicken manure (0.35%, 3.5%, and 7% dry matter—D.M.). These solutions were then used in bioponic rafts where total ammonia nitrogen (TAN) concentrations were fixed at 150 mg/L. For the second trial, D.M. was fixed at 2.5% for each tested modality, but TAN concentrations varied among them (i.e., 60, 90, and 120 mg/L TAN concentration). Modalities with low D.M. concentration (0.35%) and those with low TAN concentration (60 mg/L) resulted in higher yields than bioponic modalities receiving high concentrations of dry matter or TAN, respectively, for trials 1 and 2. Although the reference chemical solutions generate the greatest yields, bioponic systems operating with chicken manure present a good alternative for the cultivation of vegetables in developing countries with heavily contaminated soils. Indeed, bioponics allows for the production of vegetables in large quantities from animal waste, which does not pose health risks for human consumption. Local vegetable species commonly grown in Lubumbashi should be tested under hydroponic conditions.