前言早在1933年苏联萨沃斯金和德尔聂尔进行了稀土培育小麦的试验,发现低剂量促进作物生长,高剂量则抑制作物生长。从1935年开始,德罗布科夫研究混合稀土、单一稀土对豌豆生长和结荚的影响。在培养液中加入硝酸稀土后试验株与对照比较,全株重增加58.7%,根重增加61.2%,豆荚增加两倍.罗马尼亚农学家高罗维茨在六十年代研究硫酸銑对玉米和小麦生长的影响,发现可提高作物发芽率,促进作物生长并加强氧化酶的活性。保加利亚 Preface As early as 1933, Savoy Gold and Delsieri of the Soviet Union carried out trials on rare earth wheat and found that low doses promoted crop growth while high doses inhibited crop growth. Since 1935, Drobkov has studied the effects of mixed rare earths and single rare earths on pea growth and podding. The test strain was increased by 58.7%, the root weight was increased by 61.2% and the number of pods was tripled compared with the control when the Rare Earth Nitrate was added to the culture broth. Romanov Agronomist Javovitz studied the effect of sulfuric acid milling on corn and wheat Growth, found that can improve crop germination rate, promote crop growth and enhance the activity of oxidase. Bulgaria