Yes, You can import all those policies to your production environment. Below is the process.
Open the policy which you want to replicate to your production ,
Manage>Policies>Polciy List>Configure Policy(open the policy you want to export)
Now you will find an option at the bottom left of the page "Export this policy as a template"
Click on this option and save the policy to you machine.
Now copy the exported policy which is in xml format to your prodcution Enforce server under the below mentioned path Path:D:SymantecDLP>protect>config>templates.
Now import the policy by clicking on Add Policy in the policy tab.once you click on Add Policy,you will be asked to choose a type of policy to add and you will be given 2 options. Select "Add a Policy from a template".
Navigate to the "Imported templates" which is at the bottom on this page and select the template you copied to the Enforce path.
Note: If your DLP is on 12.5 version, you have to create the reusable reciepient patterns,identifiers(if any) before you import the policy.