Silica gel is an important matrix material for making silicon fertilizer.
Silicon is a large-scale production-increasing element for plant growth, and most plants contain silicon in their bodies. Especially rice and sugar cane, in recent years, the nutritional effects of silicon have been considered to be second only to N, P, and K. It ranks fourth.
The application of silicon fertilizer can improve the soil, correct the soil acidity, increase the soil salinity, promote the decomposition of organic fertilizer, and inhibit soil bacteria. Silicon fertilizer can make the stalks of crops stout and achieve the purpose of anti-lodging.
After absorbing silicon, silicified cells are formed, which improves the strength of plant cell wall. The plant type is tall and straight, and the stems and leaves stand straight, which is conducive to dense planting, improving the photosynthesis of leaf surface, and conducive to ventilation and light transmission and accumulation of organic matter.
Increased cuticle, enhanced resistance to pests and diseases, can reduce the amount of pesticides. The presence of silicic acid can improve the soil, correct the acidity of the soil, enhance the oxidation power of the root, and make soluble bivalent iron or manganese oxidized and deposited on the root surface, so as not to be poisoned by excessive absorption.
At present, the varieties of silicon fertilizer mainly include water-soluble, citric soluble and nano-sized silicon fertilizer. Silica gel is usually used for water-soluble silica fertilizer. Water-soluble silicon fertilizer refers to the silicon fertilizer that is soluble in water and can be directly absorbed by plants, and the application amount is small. It is commonly used for foliar spraying, flushing and drip irrigation (adding water to dilute 1000-3000 times to form a suspension, the amount of mu is 60-90 grams), and the absorption and utilization rate of crops are high, and it is a high-temperature chemical synthesis.