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早在三十年代初,便有人发现稀土元素对农作物具有某些生理活性。嗣后,东欧某些国家对此曾有零星报道,但应用于水稻,国外迄今未见报道。在国内,湖南省1973年便开始进行研究,并取得一些成果。我省起步晚,1982年才开始田间试验。1982～1983年主要是研究生理效应;1984～1986年才先后与宣城、安庆等地区的18个县(市)协作,进行增产效果的研究与示范。几年来,共作田间小区试验23个,盆栽试验2个,大田多点对比示范试验27个(包括300余块对比稻田)。1985年在安庆地区示范面积1万余亩,1986年示范面积23000余亩。
As early as the early 1930s, some people discovered that rare earth elements have some physiological activities on crops. Subsequently, some countries in Eastern Europe have sporadically reported this, but applied to rice, so far no reports from abroad. At home, Hunan Province started research in 1973 and achieved some results. My province started late, 1982 began field trials. From 1982 to 1983, it was mainly the research of physiological effects. From 1984 to 1986, it cooperated with 18 counties (cities) in Xuancheng and Anqing successively to study and demonstrate the stimulation effect. Over the past few years, a total of 23 plots for field plots, 2 pot experiments and 27 more demonstration plots (including more than 300 contrasting rice fields) in the field. Demonstration area in Anqing in 1985 more than 1 million mu, demonstration area of 23000 acres in 1986.