Modern agriculture must be subject to some adaptation processes due to unpredictable climate changes. One of the activities that enables the production of plant biomass in adverse climatic conditions is the development of ecological and innovative crop technologies using natural plant extracts. The elimination of synthetic fertilizers and their replacement with products based on organic matter will increase the plant’s resistance to negative conditions of environmental stress, will have a positive effect on the development and yielding of plants and will reduce cultivation costs. The plant material: willow (Salix viminalis), Jerusalem artichoke (Helianthus tuberosus) and Virginia mallow (Sida hermaphrodita). The natural extract was obtained from Navicula sp. (Bacillariophyceae) monocultures, which was applied to plants in three variants: watering, spraying (foliar application) and watering and spraying. Every 2 weeks: plant height and chlorophyll content index were determined and at the end of the growing season, an analysis was made of: fresh and dry biomass, gas exchange activity in plants (net photosynthesis, transpiration, stomatal conductivity and intercellular CO₂ concentration). The enzymatic activity of acid (pH = 6.0) and alkaline (pH = 7.5) phosphatase, RNase, dehydrogenases, as well as the integrity of cytoplasmic membranes was determined. The obtained results confirmed the positive effect of diatom monoculture extract on the growth and development of the plants. The analyzed physicochemical parameters were characterized by 15–20% higher values in comparison with the control. The use of natural extracts from Navicula sp. can be an alternative to chemical fertilizers and is considered one of the promising strategies in organic agriculture.

由于不可预测的气候变化，现代农业必须经历一些适应过程。能够在不利气候条件下生产植物生物质的活动之一是利用天然植物提取物开发生态和创新作物技术。消除合成肥料并用基于有机物的产品替代将提高植物对环境压力的不利条件的抵抗力，对植物的生长和产量产生积极影响，并降低种植成本。植物材料：柳（柳柳），菊芋（向日葵）和弗吉尼亚锦葵（Sida hermaphrodita）。天然提取物是从Navicula sp。（芽孢杆菌）单一培养物，其以三种变体应用于植物：浇水，喷洒（叶面施用）以及浇水和喷洒。每2周：确定植物的高度和叶绿素含量指数，并在生长季节结束时进行以下分析：新鲜和干燥的生物量，植物中的气体交换活性（净光合作用，蒸腾作用，气孔导度和细胞间CO _2）浓度）。测定了酸性（pH = 6.0）和碱性（pH = 7.5）磷酸酶，RNase，脱氢酶的酶活性以及细胞质膜的完整性。获得的结果证实了硅藻单培养提取物对植物生长和发育的积极作用。与对照组相比，所分析的理化参数的特征在于其值高15-20％。使用Navicula sp。的天然提取物。可以替代化学肥料，被认为是有机农业中有希望的战略之一。