Silicon Dynamics and Crop Responses in Tropical Soils

Silicon (Si) is an important yet often overlooked element in agriculture. It impacts soil-plant dynamics and crop productivity, particularly in Si-depleted tropical soils. This deficiency, given the role Si plays in enhancing tolerance to biotic and abiotic stresses, poses challenges for plant growth and yield. Silicon applications have shown promise in mitigating various stressors, including diseases, pests, water deficits, and heavy metals. However, the integration of Si into fertilization routines remains limited, partly due to growers’ hesitance. Understanding the complex interplay of Si in soil-plant systems is essential for optimizing its benefits. This involves recognizing various sources and sinks of Si in soils, as well as its uptake mechanisms and deposition within plant tissues. To harness Si full potential, strategies for Si management must be tailored to specific soil conditions and crop requirements. This necessitates a comprehensive knowledge of Si chemistry, extraction methods, and fertilizer applications. By embracing Si as a crucial component of fertilization practices, agricultural systems can enhance resilience and productivity in Si-limited environments such as those found in the tropics.