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桐城县从1986年引进“粳系21-2”,经过试种、示范,逐步扩大种植。1990年推广面积达6.02万亩,平匀亩产370公斤,比当选晚2号、鄂宜105等品种增产10%以上;1991年种植面积增加到6.5万亩,平匀亩产350公斤,比78270、鄂宜105等增产15%左右。近2年种植面积皆占该县双季晚粳28万亩的20%以上。已成为全县双季晚粳的主栽品种之一,并有继续扩大种植的势头。为了进一步掌握“粳系21-2”的栽培技术,在安徽农学院的主持下,报请省科委批准成立了“双晚粳系21-2亩产400公斤配套栽培技术试验研究”协作研究课题组,并于1990年制订了实施方案,1991年分别在桐城
Tongcheng County introduced “Japonica 21-2” from 1986, and after planting and demonstration, it gradually expanded its planting. 1990 to promote an area of 60,200 mu, average mu 370 kg, more than the election late on the 2nd, E-105 and other varieties yield more than 10%; 1991 acreage increased to 65,000 mu, average mu 350 kg, than the 78270, Eyi 105 yield 15% or so. Nearly 2 years of planting area accounts for the county double crop late rice 28 million mu of more than 20%. It has become one of the main cultivars of double season late japonica in the county and has continued to expand its planting. In order to further master the cultivation techniques of “japonica 21-2”, under the auspices of Anhui Agricultural College, it was reported to the Provincial Science and Technology Commission for approval to establish a collaborative research project entitled “Experimental Study on Maturing Cultivation of 400 kg of Double Late Japonica Lines 21-2 Mu” Group, and in 1990 formulated the implementation plan, 1991, respectively, in Tongcheng