棉 花 学 报    Cotton Science    2009，21(6)：515-519

Regulating Effect to Yield Characteristics of Cotton with Spraing Combined Choline Chloride-BF₁During Boll-setting
LI Xin-yu，WANG Hong-wu，CAI Hong-tao，WAN Yan，FENG Yan-bo，TANG Yi-zu^*
(MOA Key Laboratory of Crop Physiology & Ecology in Southern China, Cotton Research Institute Of Nanjing Agricultural University，Nanjing 210095, China )

Abstract：The experiment was carried out in Jiangpu Experiment Station of Nanjing Agriculture University in 2002 and 2005, to study regulating effect of yield characteristics of cotton with spraying choline chloride or BF₁ during boll-setting .The boll weight of seedcotton in different position was increased with CC(CC+CC) treatment, BC(BF₁+CC) treatment and BBC(BF₁+BF₁ and CC) treatment. The bolls-setting was increased in different position with BBC treatment, but BC treatment, it was increased to bolls-setting in1～2 nodes of 1～9 branches and nodes besides 1～2 nodes of 1～4 branches, including those bolls setting in hot days and a few early autumn days. It was obvious that CC treatment is suitable to the regulating objective heavy-producing in increasing the boll weight of seedcotton produced, BC and BBC treatment are suitable to the regulating objective heavy-producing in increasing both boll weight of seedcotton produced and number of boll during boll-setting.
Key words：choline chloride；cotton；yield characteristics；spatio-temporal regulating effect
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