微生物菌剂对菜心种子萌发及幼苗生长的影响

Microbial Agents on Seed Germination and SeedlingGrowth of Flowering Chinese Cabbage

为探究微生物菌剂对菜心种子萌发及幼苗生长的影响,用10种微生物菌剂分别对菜心种子和菜心幼苗进行处理,研究了不同微生物菌剂对菜心种子发芽指数、幼苗生物量、壮苗指数、根系构型和光合色素含量的影响。结果表明,添加外源稀释400倍的微生物菌剂后,菜心种子发芽指数、幼苗壮苗指数、根系长度、根系表面积、根系体积和叶绿素(a+b)含量均得到不同程度提高。其中种子发芽指数以内生普里斯特氏菌(T1)处理较高,较清水(CK1)处理高出40.7%;幼苗壮苗指数和根系长度以耐盐芽孢杆菌(T4)处理较高,分别较营养液(CK2)处理高出50.0%和87.7%;根系表面积、根系体积、根系平均直径和叶绿素(a+b)含量以T1处理较高,分别较营养液(CK2)处理高出154.4%、89.7%、13.5%和19.3%,差异显著。隶属函数结果表明,稀释400倍的内生普里斯特氏菌(Priestia endophytica)处理对菜心促生作用最好。

We studied the effects of 10 types of microbial agents on the germination index of seeds,the biomass,seedling index,root structure,and photosynthetic pigment content of flowering Chinese cabbage seedlings to investigate the effects of microbial agents on seed germination and seedling growth of flowering Chinese cabbage.The results showed that after adding exogenous microbial agents,the germination index of seeds,seedling index,root length,root surface area,root volume,and chlorophyll(a+b)content increased to different degrees.Among them,the germination index of Priestia endophytica(T1)treatment was higher significantly 40.7%than water treatment(CK1).Compared to nutritional liquid(CK2)treatment,the seedling index and root length of flowering Chinese cabbage seedlings increased significantly by 50.0%and 87.7%under Bacillus halotolerans(T4)treatment,respectively.The root surface area,root volume,root average diameter and chlorophyll(a+b)content were higher significantly 154.4%,89.7%,13.5%,and 19.3%under T1 treatment than nutritional liquid treatment,respectively.The membership function results indicated that Priestia endophytica 400-times diluted treatment is beneficial to promote the growth of flowering Chinese cabbage.