What is the important role of silicon fertilizer? Promote crop growth to help soil health, sand can be seen everywhere, its main component is silica, then does the crop still need to supplement silicon nutrition? Originally, silicon is one of the necessary medium elements for crop growth, even some experts call it The fourth largest element after NPK. Recently, at the 2017 Silicon Fertilizer Research and Development and Crop Application New Products and New Process Exchange Seminar held in Changsha City, Hunan Province, experts at the meeting said that there is a certain area of ​​silicon-deficient soil in China, and it is necessary to apply silicon fertilizer to supplement the corresponding elements. .
“The growth of most crops requires the addition of large amounts of silicon. For example, the production of 1000 kg of rice, the absorption of silica by the above-ground part of the rice is 150 kg.†Cai Delong, a researcher at the Henan Silicon Fertilizer Engineering Technology Research Center, believes that “In a large part of China's soil, 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 is generally less than 10 mg / liter."
Liu Jianming, a researcher at the Institute of Geology and Geophysics, Chinese Academy of Sciences, also held a similar view: "While silicon is the most abundant mineral element in the soil, most of the crops are ineffective silicon and cannot be absorbed and utilized, but are truly effective for crops. Silicon nutrition, but often in a state of poverty."
So, what effect does silicon have on crop growth? Zhao Fenglan, a researcher at the Institute of Geography of the Henan Academy of Sciences, said that the absorption of sufficient silicon nutrition by crops is beneficial to the ventilation and light transmission of leaves, increasing photosynthesis, thereby increasing yield and improving quality;
On the other hand, it is conducive to the accumulation of organic matter, making crop cells dense, increasing sugar content and enhancing cold resistance; in addition, silicified cells in crops also have the effect of regulating the degree of stomatal closure of the leaves. When water is scarce, the pores are half-opened or closed, reducing Plant water evaporation, while promoting root development and enhancing drought resistance.
“Si can also increase the utilization rate of phosphate fertilizer by activating phosphorus in the soil and promoting the absorption of phosphorus by the roots, thereby increasing the seed setting rate.†According to Peng Guoxiang, director of Hunan Zhongxin Modern Agricultural Science and Technology Industry Development Center, “silicon has nutritional regulation. The function can promote the balanced absorption of NPK, improve the nutrient content of the crop, increase the sugar content of the fruit, the fat of the peanut and the starch content of the grain."
The fertilization test conducted by Yu Rongsheng, deputy director of Guangxi Qinde Technology Co., Ltd. on rice, confirmed the effect of silicon fertilizer on increasing yield and quality. He said: "The test results show that rice lacking silicon can easily lead to slender and weak stems, easy lodging and infection. The lack of silicon in the early stage will reduce the number of panicles in rice, and the lack of silicon in the later period will reduce the number of spikelets. Scientific application of silicon fertilizer Can increase rice production by 10% to 15%."
A group of wheat silicon fertilizer test data published by Cai Delong in Fugou County, Henan Province showed that the application of silicon fertilizer group yielded 1030 kg per mu, wheat ears had 48 granules per plant, wheat 1000 granules were 54.5 g; Jin, wheat has 38 to 43 grains per plant, and wheat has a grain weight of 51 grams.
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 5-8, the effective silica content is positively correlated with the soil pH. Therefore, the application of silicon fertilizer can improve the acid soil.†Zhao Fenglan said, “The silicate fertilizer can also be in the soil. The sodium ion reaction that causes the salt and alkali damage, reduces its activity, and plays a role in improving the saline-alkali soil."
In the prevention and control of heavy metal pollution, silicon fertilizer also performed well. According to Sheng Jianwei, a professor at the College of Chemistry and Materials of Hebei Normal University, silicon fertilizer has a significant effect on cadmium reduction in rice and corn. Bio-based silicon fertilizer is used as a soil conditioner to reduce soil available cadmium by 30% to 70% and rice cadmium content. Reduced by 40%~60%; as a leaf surface control agent, the cadmium content of rice can be reduced by 25%~35%.
Why does silicon fertilizer have the function of preventing heavy metal pollution in soil? Cai Delong explained that silicon fertilizer can reduce the activity of heavy metals by increasing the pH value of soil, and can reduce the pollution of heavy metals by passivating the activity of heavy metals.
This article URL: What are the important functions of silicon fertilizer? Promote crop growth and help soil health
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