Seeding Density and Foliar Application of a Calcium and Potassium-Based Organomineral Fertilizer in Oat Crops

Purpose: To present the benefits of increasing oat sowing density on productivity, uniformity, soil quality and reduction of pesticides and the use of an organomineral product based on calcium and potassium as an alternative to lodging control, promoting more sustainable cultivation systems. Theoretical framework: Increasing plant density can promote productivity, rapid soil coverage, reduction of weeds and greater harvest uniformity, reducing the use of pesticides. However, increasing seeding density can promote lodging. Lodging is the phenomenon in which plants leave the vertical position and fall to the ground, affecting the quality of the grains. The commercial product registered to control lodging is highly toxic to the environment. Organomineral sources with potassium and calcium represent an alternative for controlling lodging with reduced environmental impacts. Results: Benefits of increased seeding density to promote grain yield have been found for several crop species, reinforcing the need for adapting seeding density for oat crops. The use trinexapac-ethyl as a growth regulator, it poses risks of phytotoxicity and environmental contamination. In this context, several studies have indicated that potassium and calcium favor cell wall rigidity, potentially contributing to oat stem strength. Originality/value: This study provides significant contribution to the advancement of research on oat in Brazil, bringing new information benefiting farmers, technical assistance agents, and the food industry and improving the production system to ensure food security and care for the environment. Objetivo: Apresentar os benefícios do aumento da densidade de semeadura da aveia sobre a produtividade, uniformidade, qualidade do solo e redução de agrotóxicos e do uso de produto organomineral a base de cálcio e potássio como alternativa ao controle do acamamento, promovendo sistemas de cultivo mais sustentáveis. Referencial teórico: O aumento da densidade de plantas pode promover a produtividade, rápida cobertura do solo, redução de ervas daninhas e maior uniformidade de colheita, reduzindo o uso de agrotóxicos. No entanto, o aumento da densidade de semeadura pode promover o acamamento. O acamamento é o fenômeno em que as plantas perdem a posição vertical e caem sobre o solo, afetando a qualidade dos grãos. O produto comercial registrado para controle do acamamento é altamente tóxico ao ambiente. Fontes organominerais com potássio e cálcio representam uma alte