11/15/2023 0 Comments Agricultural liquid fertilizers![]() In contrast, experiences with organic growth systems have shown that the development of diseases is seldom explosive in these systems. These treatments also create a sterile root environment, making roots prone to invasive diseases and increasing potentially explosive disease outbreaks. ![]() In addition, current disinfection procedures (e.g., heat treatment, ozone, hydrogen peroxide, and UV radiation) are not sustainable ( Maessen and Verheul, 2016). However, these systems increase the risks of disease spread and investment costs for the construction of recycling facilities and leachate disinfection. Recycling soilless systems are used in many countries. Closed-cycle soilless systems, where all leachate is recycled, can further reduce fertilizer run-off by 30–40% compared with open-cycle systems ( Montesano et al., 2010). However, the average leaching rate from open drip irrigation systems is between 20 and 40% ( Van Os, 1999). Nutrient composition and supply are highly controlled to reduce fertilizer usage and water consumption. In modern greenhouses, tomatoes are grown in soilless cultures using nutrient film techniques (NFT) or rockwool slabs with drip irrigation. ![]() In northern latitudes, year-round cultivation of high-value vegetables, such as tomatoes, can only be conducted in greenhouses. However, additional adjustment of nutrient supply is required to improve fruit quality. In conclusion, organic waste-based cultivation is a possible solution for sustainable plant production in greenhouses. The organic waste-based fertilization did not change the root power but increased fruit size. The low-mineral treatment increased xylem sap contribution to fruit weight because of higher root power. The plants grown with organic waste-based or low-mineral medium showed significantly poorer fruit quality than the plants cultivated with the high-mineral solution. The leaves of plants cultivated with organic waste-based fertilizer contained higher concentrations of starch and soluble carbohydrate and low concentrations of phosphorous (P) and sulfur (S). Plants cultivated with organic waste-based fertilizer had high Cl − concentration in xylem sap, leaves, and, ultimately, fruits. The growth rate was similarly reduced in plants cultivated with low-mineral fertilizer. The tomatoes grown with organic waste-based liquid fertilizer showed reduced growth rates but increased mean fruit size, resulting in no significant change in total yield compared with high-mineral cultivation. We compared plant growth and fruit quality traits of tomato plants grown in a hydroponic solution with organic fertilizer with two levels of mineral fertilizer. Therefore, additional controls were included. Integration of a nitrification bioreactor presumes a significantly lower concentration of nutrient solutions and a higher level of oxygenation than classical mineral cultivation. The aim of this experiment was to investigate how fertilizer based on liquid biogas by-products of pig manure digestion can affect the growth and production of tomato plants. Liquid digestate from manure-based biogas production could potentially serve as fertilizer if integrated with closed horticultural irrigation systems. ![]() In regions with intensive agricultural production, large amounts of organic waste are produced by livestock animals. 2Department of Food Science, Aarhus University, Aarhus, Denmark.1Division of Food Production and Society, Department of Horticulture, Norwegian Institute of Bioeconomy Research (NIBIO), Ås Municipality, Norway.Verheul 1 Martina Paponov 1 Anush Panosyan 1 Ivan A. ![]()
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