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本世纪20年代先后由S.Sommer 和Bortets 等人确定锌、铜为植物必需的营养元素,后来又明确了锰对植物生长发育的必要性。我国自70年代以来,在玉米、水稻和小麦等农作物及部分果树上进行了施用锌、锰和铜的试验,其增产效果显著;1987～1988年沈阳农业大学刘永菁等人在蕃茄上进行了施锌试验,结果表明:施用适量的锌不仅能提高产量,而且可以改善果实的品质,尤其是可以明显地增加果实中锌含量,可做为人
In the 1920s, S.Sommer and Bortets et al. Determined that zinc and copper are essential nutrients for plants, and then clarified the necessity of manganese for plant growth and development. Since the 1970s, experiments on the application of zinc, manganese and copper to crops such as corn, rice and wheat and some fruit trees have been carried out with remarkable yield increase effect. From 1987 to 1988, Liu Yongjing and others from Shenyang Agricultural University conducted experiments on tomatoes The results showed that applying proper amount of zinc could not only increase the yield, but also improve the quality of the fruit, especially the zinc content in the fruit could obviously increase