摘要
以东森寒葱2号为试验材料,通过测定大葱苗期喷施调环酸钙(200、400、600、800 mg·L-1)处理的形态指标、叶绿素和根系活力等指标,探究不同浓度调环酸钙对大葱种苗质量的影响.结果表明,调环酸钙能有效增加大葱幼苗的假茎粗、假茎长度和叶片叶绿素含量,提高根系活力、促进根系生长,且其适宜浓度为600 mg·L-1.处理后21 d,与清水对照相比,600 mg·L-1 调环酸钙处理的假茎粗、假茎长和根系活力分别提高了22.0%、66.9%和65.7%;根系、假茎、叶片和全株干质量分别增加38.5%、48.4%、34.6%和37.9%.与200 mg·L-1 矮壮素处理相比,600 mg·L-1 调环酸钙处理的根冠比、壮苗指数和总叶绿素含量分别上升23.0%、37.0%和19.4%.综上,叶面喷施600 mg·L-1 的调环酸钙能有效提高大葱种苗质量.
Abstract
The green onion variety'Dongsenhancong No.2'was used as experimental material,and the effects of different concentrations of prohexadione calcium(Pro-Ca,200,400,600,800 mg·L-1)on the quality of green onion seedlings were investigated by measuring the morphological index,chlorophyll content and root activity at seedling stages.The results showed that Pro-Ca could effectively increase the pseudostem diameter,pseudostem length and chlorophyll content of green onion seedlings leaves,enhance root activities,promote root growth,and the appropriate concentration of Pro-Ca was 600 mg·L-1.Compared with water control treatment,the pseudostem diameter,pseudostem length and root activity of green onion seedlings treated with 600 mg·L-1 Pro-Ca were increased by 22.0%,66.9%and 65.7%,respectively,while the root,pseudostem,leaves and whole plant dry weight were increased by 38.5%,48.4%,34.6%and 37.9%,respectively,at 21 days after treatment.The root shoot ratio,seedling index and total chlorophyll content under 600 mg·L-1 Pro-Ca treatment were increased by 23.0%,37.0%and 19.4%in comparison to 200 mg·L-1 chlormequat chloride(CCC)treatment.In conclusion,the quality of green onion seedlings can be improved by spraying 600 mg·L-1 of Pro-Ca on the leaf surface at seedling stage.
基金项目
河南省大宗蔬菜产业技术体系项目(HARS-22-07-S)
国家科技期刊平台
NSTL
维普
万方数据