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.
prohexadione calcium(Pro-Ca)green onionseedlingsseedling index
国家科技期刊平台
NSTL
维普
万方数据
