Sand is everywhere and its main component is silicon dioxide. Does the crop still need to be supplemented with silicon nutrition? Originally, silicon was one of the middle elements necessary for crop growth, and even some experts called it the fourth largest element after NPK. Industry experts said that there is a certain area of ​​silicon-deficient soil in China, and it is necessary to use silicon fertilizer to supplement the corresponding elements.
Most crops need large amounts of silicon
“Most crops need to be supplemented with large amounts of silicon. For example, to produce 1,000 kg of rice, the absorption of silica in the above-ground part of rice will reach 150 kg in the whole growth period.†According to industry sources, in a considerable part of the soil in China, Silicon is scarce. The study found that the content of silica in the soil of the Yellow River, Haihe River, Huaihe River, and Yangtze River Valley was generally lower than 10 mg/L.
Liu Jianming, a researcher at the Institute of Geology and Geophysics of the Chinese Academy of Sciences, holds the same view: “Although silicon is the most abundant mineral element in soil, most of the crops are ineffective silicon and cannot be absorbed and utilized, but they are truly effective in crops. Silicon nutrition is often in a poor state."
Growth of crops, significant contribution of silicon fertilizer
According to Zhao Fenglan, a researcher at the Institute of Geography of the Henan Academy of Sciences, the absorption of sufficient silicon nutrition by crops is beneficial to the ventilation and light transmission of leaves and the increase of photosynthesis, which in turn increases the yield and improves quality. On the other hand, it facilitates the accumulation of organics and makes the cells dense. Increased sugar content increased cold resistance; in addition, the silicified cells in the crops also had the effect of regulating leaf stomatal closure. When water was scarce, the pores were opened or closed halfway to reduce evaporation of plant water, and at the same time promote root development and enhance drought resistance.
"Silicon can also increase the utilization rate of phosphate fertilizer by activating phosphorus in the soil and promoting the absorption of phosphorus by the root system, thereby increasing the seed setting rate." According to Peng Guoxiang, director of Hunan Zhongxin Modern Agricultural Technology Industry Development Center, "Silicon has nutritional regulation. The role can promote balanced absorption of N, P and K, improve the nutrient composition of crops, and increase the sugar content of fruits, peanut fat and starch content of grains."
Soil improvement, powerful silicon fertilizer
The function of silicon fertilizer is not only reflected in the promotion of crop growth but also in the improvement of soil. "In soils with a pH of 5 to 8, the content of available silica is positively correlated with soil pH. Therefore, the application of silicon fertilizer can improve the acidic soil." Zhao Fenglan said, "Silicate fertilizer can also be used in soil. Saline-alkali-damaging sodium ions reduce their activity and improve salt and alkali."
Silicon fertilizer also performed well in the prevention and control of heavy metal pollution. Silicon fertilizer has significant cadmium-reducing effect in rice and corn. Biological silicon fertilizer can reduce the available cadmium in soil by 30%-70% and the content of cadmium in rice by 40%-60%; The agent can reduce the cadmium content of rice by 25% to 35%. On the one hand, silicon fertilizer can reduce the heavy metal activity by increasing soil pH, and on the other hand, it can reduce heavy metal pollution by inactivating heavy metal activity.
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