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微量元素是作物营养物质的重要组成部分,虽然它含量甚微,却是不可缺少和相互取代的。当缺少某种微量元素时,作物生长发育受到抑制,导致减产和品质下降,严重时颗粒不收。微量元素不足还常引起一些作物的病害发生,这已是众听周知的事实。 但微量元素适量范围窄,如<0.31ppm的硼,作物更感缺乏,>1.2ppm的硼,即可出现中毒症。所以在生产中也常见由于微量元素施用过量而产生的中毒现象。了解土壤中微量元素含量及其动态变化,适时适量的补施,对促进生产是有很大意义的。
Trace elements are important components of crop nutrients, though they are minor in content, but they are indispensable and mutually replaceable. When lack of trace elements, crop growth and development are inhibited, resulting in reduced production and quality decline, serious particles do not accept. It is a well-known fact that inadequate trace elements often cause disease in some crops. However, the range of suitable trace elements, such as <0.31ppm of boron, the lack of more crops,> 1.2ppm of boron, can appear toxicosis. So in production are also common as a result of excessive use of trace elements poisoning phenomenon. Understanding of soil trace elements and its dynamic changes, appropriate amount of supplementation, to promote production is of great significance.