![]() Over the long-term, this could have negative effects on the Si supply to rice plants. This is not done by all of the farmers that were interviewed within the LEGATO project, i.e., some of them remove part of the straw and use it e.g., as fertilizer on vegetable fields. The farmers should therefore recycle the straw completely. Recent literature suggests that the recycling and decomposition of rice straw plays a crucial role for Si availability. In a subsequent study, the LEGATO researchers currently focus on the soil processes that determine the pool of plant-available Si during the growing period. Another major source of plant-available Si is the dissolution of solid soil particles. In rain water, the concentrations of Si were below the detection limit of the analytical method the researchers, thus, assume that rain is no important Si source for plants. The data show that the irrigation water can provide a considerable amount of the Si that is taken up by plants. Researchers from the interdisciplinary LEGATO project on sustainable rice production look in more detail at the cycle of plant-available Si in contrasting regions of Vietnam and the Philippines to provide insights on the importance of this element on rice production.Ī recent article published in the journal Plant and Soil reports on Si cycling and budgets on the farm level in the Laguna province of the Philippines. Silicon might, thus, play a crucial role in the development of `sustainable` rice production systems with lower or zero input of harmful pesticides. For instance, Si enhanced the resistance against pests, pathogens and abiotic stresses such as salts, drought and storms.
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