ÃÞ »¨ ѧ ±¨   Cotton Science  2005£¬17(6)£º339-342

 

Effect ofDrought Duration and Fertilizer at Seedling Period on Cotton Development
NAN Jian-fu1£¬LIU En-ke1£¬WANG Ji-ping2£¬XU Shan-shan1ª¤
(1.Arid Farming Research Centre£¬ Shanxi Academy of Agricultural Sciences£¬Taiyuan 030031 China£»2.Shanxi Agricultural University£¬Taigu 030801£¬China)ª¤ª¤

Abstract£ºWe studied the influence on the cotton growth and development of the interaction between the drought stress and fertilizer during the cotton seedling£¬ through the method of basin and imitating in the field with Jinmian 21. The results showed that£º¢ÙThe drought stress during the seedling had significant effect on regulating the speed of main stem growth£¬cultivating and strengthening seedling£º¢Ú10-20 days drought stress could alleviate the rate of the bud fall before June effectively£¬which resulted in the period of most bolls opening was earlier about 10 days than ever before. Though under the lack of fertilizer£¬ the immature bolls before late July were easy to fall£¬addition to fertilizer could decrease the rate of the fallen boll effectively£º¢ÛJinzhong was exceptional early mature cotton region£¬ the cotton boll weight£¬lint percentage and lint index were higher relatively£¬cotton fiber quality was better£¬when collected between September 1st and 21st. The combination of the drought stress and fertilizer technique concentrated the period of boll opening in the September 1st and 20th£¬which was beneficial to the rate of better-quality boll£¬and the important measures which played a role in better quality and potentiality of addition to the output.
Key words£ºcotton; water stress; fertilize; bolls ratio of quality
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