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1950年本省开始推广岱字15号,1956年全面普及。据近几年各地考查,纯度由初期的99.8%下降到80—90%,衣分由38—41%下降到36—37%,纤维缩短十六分之一时,棉铃变小,生长势变弱,丰产性下降。为迅速提高岱15的优良种性,发挥良种的增产潜力,1956年在南通、新洋、淮阴、沛县、南汇等五站场进行原种复壮工作。1958年在南通、海门、如东、启东、常熟、大丰、宝山等县增设复壮场七处。至此,复壮工作已初具规模。
In 1950, the province started to promote the Dai word on the 15th, 1956 universal. According to the test in recent years, the purity decreased from 99.8% in the early stage to 80-90%, the percentage of clothes decreased from 38-41% to 36-37%, and the fiber shortened by 1/16 of a turn. The cotton boll became smaller and the growth potential changed Weak, high yield decline. In order to rapidly improve the excellent variety of Dai 15 and give full play to the yield potential of improved varieties, in 1956, re-establishment of original seeds was carried out in five stations of Nantong, Xinyang, Huaiyin, Peixian and Nanhui. In 1958 in Nantong, Haimen, Rudong, Qidong, Changshu, Dafeng, Baoshan and other counties added rejuvenation field seven. At this point, rejuvenation work has begun to take shape.