Potential assay of two green algae Ulva lactuca and Ulva intestinalis as biofertilizers.

In recent years, development has been witnessed in the market expansion of agricultural inputs and products including substances and materials that improve the functioning of the soil, plants, and the interactions between soil and plant. This is a very broad category of products and substances that often bring innovative solutions in the field of fertilization and crop protection. The objective of this study is to improve the production of the market garden where tomato plants in nurseries from powders of two green algae Ulva lactuca and Ulva intestinalis, harvested as biofertilizers in the west coast of Mostaganem province at North-Western Algeria. They have minimal effects on the environment, including soil, subterranean water, river, and estuary ecosystems such as the Cheliff river, biodiversity, and global warming. The experimental part was carried out following the method of extraction of algae and used as a biofertilizer on the tomato to its simplicity and accuracy, which is the subject of the study of the germination, growth, and the development of young plants. The results show that the powders obtained from the Ulva lactuca algae and used as biofertilizers are the most suitable to increase the growth of plants in the case of tomato in our study, which means a remarkable increase in stem length by compared to the other treatments with averages of 17.75 cm, 16 cm length of stem/plant, while the other treatments (Enteromorpha intestinalis, mixture, and reference) gave 14.75; 13.87; 13.65 cm length of stem/plant.