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皖棉１３ 号（ 皖杂４０） 系安徽省农业科学院棉花研究所选育出的一个陆地棉品种间杂交种。春棉，适于安徽省淮北、江淮丘陵、长江及邻省无病或轻病棉区广泛种植，株高１１０ ～１２０ｃｍ ，单株结铃性强，铃大衣分高，一般单产皮棉１ ５００ｋｇ／ｈ ｍ ２ ，高产且稳产，抗逆性强， 纤维外观色白，有丝光，内在品质优良，适宜于早播（４ 月上、中旬播完） 、稀植（３ 万～３ ．７５ 万株／ｈｍ ２） 、足肥（ 比常规棉增１５ ％ ～２０ ％ ） 、全程化调。
Wanmian 13 (Wanza 40) is a cross between cultivars of upland cotton selected by Cotton Research Institute of Anhui Academy of Agricultural Sciences. Spring cotton, suitable for Huaibei, Jianghuai hills, the Yangtze River and neighboring provinces without disease or mildly affected cotton area widely planted, plant height 110 ~ 120cm, boll per plant strong, bell coat points high, the general yield of lint 1 500kg / h m 2, high yield and stable yield, strong resistance, fiber appearance of white, mercerized, excellent internal quality, suitable for early sowing (April, mid sowing), thin planting (30000 ~ 37500 / hm 2), foot fat (than the conventional cotton by 15% to 20%), the whole tune.