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在作物的营养生理上,硅素虽然还没有被列为必需的营养元素,但它在农作物营养上的作用,越来越被人们所认识和重视。许多国家对硅肥的研究试验和施用已经进行多年,日本每年施硅矿渣100多万吨,一般可使作物增产6—15％。那么,硅肥究竟有那些作用呢?一是能促进作物对氮的吸收,提高氮肥的利用率。试验证明:在施用氮肥的基础上,配合施用硅肥都比单施氮肥的增产,并随着施氮量的增加,配施硅肥增产效果更为明显。在施氮水平高的土壤中施用硅肥,在一定程度上能抑制作物呼吸作用,促使作物体内有机质向合成方向转移,可防止因高氮而造成的作物徒长和倒伏。二是硅肥能改善作物的磷素条件,促进作物新陈代谢。当土壤中缺乏磷酸,施用硅肥就会使土壤中一部分不可
In crop physiology, although silicon has not been listed as an essential nutrient, its role in crop nutrition is more and more recognized and valued. Research and application of silicon fertilizers in many countries have been carried out for many years. In Japan, more than 1 million tons of silicon slag are applied each year, which generally increases crops by 6-15%. So, what are the role of silicon fertilizer? First, to promote crop nitrogen absorption, improve the utilization of nitrogen fertilizer. The experiment proves that based on the application of nitrogen fertilizer, with the application of silicon fertilizer than the single application of nitrogen fertilizer production, and with the increase of nitrogen application, with silicon fertilizer yield more obvious. The application of silicon fertilizer in soils with high nitrogen level can restrain the respiration of crops to a certain extent and promote the transfer of organic matter to the synthesis direction in crops so as to prevent crop growth and lodging due to high nitrogen. Second, silicon fertilizer can improve crop phosphorus conditions and promote crop metabolism. When the soil lacks phosphoric acid, the application of silicon fertilizers can make some of the soil ineffective