【摘要】 研究喷施不同浓度的缩节胺(DPC)对棉花苗期主茎生长的影响,结果表明:在苗期喷施3～7.5g/hm2的缩节胺,棉花主茎日增长量比对照增加0.03～0.05cm,增长百分比为7%～11%;喷施15～60g/hm2的缩节胺,棉花主茎日增长量和对照相比降低0.1～0.12cm,降低百分比为9%～27%;对主茎日增长量的影响,DPC的作用从第6天开始,第15天作用减弱;DPC作用持续的时间和缩节胺的用量有关,其中持续时间较长的缩节胺用量为20g/hm2。更多还原

【Abstract】 Stem growth of cotton in seedling stage was examined with the treatments of different DPC concentrations in the southern Xinjiang. The result showed that by spraying DPC with the concentrations of 3~7.5 g/hm2, the daily increase of stem was 0.03~0.05 cm (7%~11%) higher than the control; and by spraying DPC with the concentrations of 15~60 g/hm2, the daily increase of stem was 0.1~0.12 cm (9%~27%) lower than the control. The influence of DPC on daily increase of cotton stem was effective in six days and weakened in fifteen days. The available duration of DPC was related to its concentration. When sprayed with the concentration of 20 g/hm2, the effect of DPC was sustained a relatively long time.更多还原