Effects of different facility environments and B9 on growth and quality of summer Brassica rapa seedlings
LI Yuhan
HU Liping
WU Gang
WANG Xing
XIA Ting
WANG Liping
LIANG Hao
Abstract：Summer greenhouse seedlings of Brassica rapa are prone to spindling,which negatively impacts their quality.To explore efficient methods for cultivating high-quality Brassica rapa seedlings during summer,this study investigated the effects of plant growth retardant B9(N-dimethylaminosuccinimide)and environmental factors in different cultivation models.The results showed that Brassica rapa seedlings grown in plant factories developed thicker stems,broader leaves,and enhanced morphological traits,including leaf length,petiole length,leaf width,and leaf number.Photosynthetic capacity was significantly improved,alongside higher content of soluble sugar,vitamin C,soluble protein,and cellulose,which were greater by 5.69％,8.60％,27.22％,and 22.96％,respectively,compared to greenhouse-grown seedlings.Addi-tionally,spraying B9 effectively mitigated spindling in greenhouse-grown seedlings,significantly enhancing photosynthet-ic capacity and root growth.Compared to the greenhouse control,net photosynthetic rate and root vigor increased by 12.99％and 33.08％,respectively.In conclusion,plant factories provide an optimal environment for cultivating high-quality Brassica rapa seedlings during summer,while B9 effectively inhibits spindling and promotes robust seedling development.
Keywords：Brassica rapaPlant factoriesSummer nurseriesGreenhousesB9
Publication Date：2025-02-04
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 134-141 )