“3517”系蒋湖农科所与荆州农科所经多年选育而成的中熟陆地棉新品系。生育期135天,株高大健壮,约120厘米,塔形,茎杆粗壮光滑,叶片较大,功能期长,不早衰,透光性好。出苗整齐,长势壮,苗蕾期生长势强,后劲足,铃特大,单铃重6.5～8克,单株结铃25～60个。中上部结铃性强,花色洁白,内在品质好,手感硬实,衣分43％,棉花品质属特等优级。霜前花率正常年份80％以上。稳产性好,较耐旱,又耐渍,适应性 “3517” is a new line of middle-aged upland cotton with long-term breeding selected by Jianghu Agricultural Science Institute and Jingzhou Agricultural Science Institute. Growth period of 135 days, sturdy and robust plant, about 120 cm, tower, stalks sturdy, large leaves, long period of function, not premature aging, good light transmission. Emergent tidy, strong growth, growing strong seedling bud stage, stamina sufficient, bolls large, single boll weight 6.5 to 8 grams, 25 to 60 bolls per plant. In the upper part of the bell strong, white color, intrinsic quality, feel hard, clothing points 43%, cotton quality is a premium grade. Pre-frost rate of more than 80% of normal years. Stability and good, more drought-resistant, but also resistant to stains, adaptability