缩节胺对高品质棉成铃与品质的影响  

Effects of Exogenous Hormones on Boll Setting and Fiber Quality of High Quality Cotton

作　　者：徐立华[1] 杨长琴[1] 李国锋[1] 杨德银[1] 

机构地区：[1]江苏省农业科学院经济作物研究所,南京210014

出　　处：《棉花学报》2006年第5期294-298,共5页Cotton Science

基　　金：科技部社会公益型研究专项(2004DIB4J146);江苏省农科院基金(6110506)

摘　　要：试验设置高控、适控处理,以不控为对照,研究缩节胺对高品质棉成铃与品质的影响。结果表明:①高控8月11日以后成铃率比适控和不控分别减少3.8和7.8个百分点,不控7月20日以前成铃率比高控和适控分别减少5.1和6.6个百分点。②适控全生育期平均铃重比高控和不控分别提高8.28%和8.06%,壳铃比高控分别比适控和不控提高6.67%和9.22%。③高控单铃种子数比适控和不控分别减少5.32粒和3.84粒,单铃不孕子数分别提高3.55粒和3.16粒。④高控、适控和不控衣分分别为37.20%、38.75%和40.25%。子指分别为13.34 g、12.48 g和11.49 g。⑤棉纤维长度、整齐度处理间影响较小,高控有降低棉纤维的比强度提高麦克隆值的趋势,差异不显著。Effects of exogenous hormones（DPC） on boll forming and fiber quality of high quality cotton were investigated in different chemical control levels in this paper. Three different chemical control levels were implemented： high chemical control （HC,210 kg · ^-2）medium chemical control （MC, 105 kg · hm^2） and no chemical control（CK, 0 kg· hm^2 ）. The main results were as follows. 1） Three treatments had big difference in boll-setting rate at different flowering stages. The boll-setting rate of HC was reduced by 3.8%,7.8%, respectively, than that of MC,CK after 8/11（Month/Day） and before 7/20 the boll-setting rate of CK was 5.1%, 6.6 % lower, respectively, than that of HC and MC. 2） the average seed cotton weight of single boll of MC was 8.28% ,8.06% higher than that of HC and CK, respectively, in the whole growth stage. The ratio of boll shell weight/boll weight of HC was 6.67%,9.22% higher than that of MC and CK respectively. 3）Compared with MC and CK, the seed number per boll of HC in whole growth stage was decreased 5.32,3.84, the infertile seed ratio of per boll was increased by 11.14 %, 9.33%, respectively. 4） The lint percentage of HC, MC, CK was 37.20% ,38.75% ,40.25%, respectively, which showed a downward trend with the increasing chemical control level. The seed index of HC,MC,CK was 13. 34g, 12. 48g, 11.49g, respectively, which showed a upward trend with the increasing chemical control level. 5）The results of fiber quality indica- ted that fiber length and uniformity were not influenced by different chemical control levels, though there was a upward trend but not significant difference in fiber strength, and downward trend in mi- cronaire value with increasing chemical control level.

关 键 词：缩节胺 高品质棉 成铃 纤维品质 

分 类 号：S562[农业科学—作物学]