江苏省亩产百公斤优质棉优化成铃的研究

STUDY ON OPTIMIZING BOLL FORMATION OF HIGH QUALITY LINT OF 100kg/MU

在江苏南京、丰县、泗阳、太仑、射阳、如皋等6个不同生态棉区试点研究表明:亩产百公斤优质棉优化成铃的指标有3个:亩铃数需6.5～7.0万以上,铃重4g左右,衣分38％～39％;成铃期间棉田成铃强度要求1500个铃/亩·日左右,优质铃占亩铃数的70％～80％,单铃经济系数75％以上;8月底前形成85％～90％大铃,10月底前有85％～90％棉铃吐絮,霜前花率90％左右。本文还提出了棉田优化成铃的途径。

During 1985～1987, field experiments were conducted in Nanjing, Feng Xian, She Yang, Tai Cang, Shi Yang and Ru Gao of Jiangsu Province. The results showed that the criteria on optimizing boll formation of high-quality lint of 100 kg/mu were as follows: the number of bolls per mu, mean boll weight and lint were 65000～70000 bolls, about 4 g and 38%～39%, respectively. The boll formative intensity was about 1500 bolls/mu·day during mass formation of cotton bolls. 70%～80% of bolls were formed from 20 July to 31 August. The boll economical coefficient was above 75%. 85%～90% of bolls were formed before 31 August. 85%～90% of bolls were open before 31 October. About 90% of open bolls were formed before frost season. The paper also suggests the ways of optimizing cotton boll formation.