Effect of Saline Water Irrigation on Growth and Physiological Characteristic of Amorpha fraticosa L.

[Objective]To study effect of saline water irrigation on Amorpha fraticosa L.sapling growth and physiological characteristics,confirm the saline water bound adaptable to Amorpha fraticosa L.sapling growth,in order to supply saline water irrigation and erea overall arrangment of different trees with reference frame for production practice of forestry development.[Method]Taking one year sapling of Amorpha fraticosa L.as research material,enact four mineralized level of saline water,CK,0.22 g/L,3 g/L,5 g/L and 7 g/L were designed.The irrigation of saline water is conventional plant manage.The study includes the morphological growth and physiological change at the different mineralized level of saline water to confirm sensible growth range.[Result]The survival rate of sapline,growth of plant height and stem tuber were decreased along with the increase of mineralized level,among which the survival rate of sapline were little affected by saline water.The survival rate of sapline could reach 83.33% with the irrigation of saline water,but the increasing rate of plant height and stem tuber were significantly lower than that of CK.With the rising of saline water concentration and prolongation of processing period,cell membrane penetrability,MDA content,proline content and soluble sugar content in leaf of sapling have rised at different range,only chlorophyll content in leaf was reduced with it.There is significant difference between physiologic indexes and CK at the condition of saline water irrigation at 5 g/L and 7 g/L.[Conclusion]The mineralized level of saline water below 5 g/L has not significant effetc on the growth of sapling of Amorpha fraticosa L.,but it can grow better at the condition of mineralized level in 5 g/L and 7 g/L.It indicated that Amorpha fraticosa L.has strong salt resistance and it can be planted widely at the area of mineralized level of phreatic water below 7 g/L.