“87繁20”是我课题在1982年用寒丰×BM20杂交选育而成的中熟偏迟晚粳新品系。1988年单季晚稻品系比较试验中亩产稻谷524.2公斤,有关领导考察时认为是个有希望的新品系。因此,1989年在金山县山阳乡、川沙县凌桥乡试种,并参加上海市单季晚稻区域试验,反映良好,今年将有大面积的试种。现将“87繁20”品系的特性和栽培技术作初步介绍,供参考。一、“87繁20”的特性据我们历年的试验和金山县山阳乡试种,“87繁20”具有以下特性: (一)产量高、增产潜力大1988年品系比较试验亩产稻谷524.2公斤,比“秀水04”增产6.2％。1989年上海市单季晚稻区试中,亩产506.47公斤, “87 繁 20” is my subject in 1982 with the × × × 20 cross breeding bred japonica late japonica new lines. In 1988, the single-season late rice lines produced 524.2 kilograms of mu per acre rice, and the relevant leaders thought it was a promising new line. Therefore, in 1989, Shansheng Township, Jinshan County, Lingqiao Township, Chuansha trial planting, and participate in the Shanghai single-season late rice regional test, reflecting the good, this year there will be a large area of ​​trial. Now 87 strains of 20 strains of the characteristics and cultivation techniques for initial introduction for reference. According to our years of experimentation and trial planting in Sanyang Township, Jinshan County, “87 繁 20” has the following characteristics: (1) High yield and great potential for increasing production of 1988 trial of 524.2 kg of mu per mu , An increase of 6.2% over “Silk 04”. 1989 Shanghai single season rice trial, mu 506.47 kilograms,