Effect of organic fertilizer on growth of castor bean seedling under saline sodic soil

A pot experiment was conducted to explore the effect of organic fertilizer on growth of castor bean seedlings under saline sodic soil in a greenhouse.The soil had two different salt concentrations of 0.11% and 0.19%.The used organic fertilizer were vermicompost,bacterial manure and cow dung.on the measured parameters included the morphological trait,physiological indicators and biomass of castor bean seedlings.The result indicated that salt stress inhibited the height,leaf area,dry and fresh weight,and reduced the content of soluble sugar and MAD,the activity of SOD and POD.The organic fertilizer had significant effect on castor bean seedlings.Vermicompost enhanced the height,stalk diameter,leaf area,dry and fresh weight,the activity of enzyme,the content of chlorophyll a,total chlorophyll,carotenoid.Both vermicompost and bacterial manure increased the weight ratio of castor bean root,the content of soluble sugar,soluble protein and MAD.It can be included that organic fertilizer,particularly vermicompost,had more positive effect on the regulation of castor bean seedlings under saline-alkali soil,and benefit for incubating strong castor bean seedlings.The bacterial manure had the similar role in the seedling growth.