一九七○年中央棉花会议后,我们遵照毛主席“有了优良品种,即不增加劳动力、肥料,也可获得较多的收成”的教导,坚持路线教育,抓好典型。首先在二队开始株选,一九七一年种“株行圃”2.4亩,亩产皮棉142斤,比没选的棉种增产48％,绒长增加2毫米,衣分提高4％。经过4年坚持提纯复壮棉种,一九七四年全大队400亩棉花可实现原种化,以后每年可更换一次原种。实践证明,“三年三圃”是棉花提纯复壮、繁育良种的好方法。三年三圃是第一年建立株行圃,第二年建立株系圃,第三年建立原种圃,经三年三圃复壮繁育,生产原种,供生产使用。建立三年三圃之前,必须做好种籽准备工 After the Central Cotton Conference in 1970, following the guidance of Chairman Mao’s “excellent varieties, that is, we can get more crops without increasing labor force and fertilizer,” we adhere to the line education and do a good job of typical examples. In the first two teams began to plant strains, in 1991, “Zhu Xing nursery” 2.4 acres, 142 pounds of mu of lint, more than 48% of non-selected varieties of cotton, cashmere grow 2 mm, 4% increase in clothing. After 4 years of adherence to purifying and rejuvenating cotton species, the entire group of 400 acres of cotton in 1974 was able to seed the species and replace it once a year. Practice has proved that “three years three nurseries” is a good way to purify and rejuvenate cotton, breeding varieties. In the third year, Sanpu was established as a nursery for the first year and as a nursery for the second year. In the third year, a nursery was established. After three years of rejuvenation, Sanpu nurtured and produced the original species for production. Before the establishment of the three-year plan, seed preparation workers must be prepared