The IR Treatment is something that is processed in the camera. It is a camera setting that Lightroom doesn't read. That's because the setting is one of those individual settings that is not in a standard location. The reason you can see the effect in the camera and in Lightroom for a few seconds is that you are seeing the embedded JPEG preview. But then Lightroom builds its own preview from the raw image data, ignoring almost all of those in-camera settings. If you want the IR Treatment to show immediately in Lightroom without any adjustments, then you need to shoot that image in JPEG mode. That way, all of the camera adjustments will get "baked" into the image file. Lightroom will not be required to interpret anything.
Thank's for your answer.
So nothing to do in lightroom for that,
I use DXO optics too and no problem in this one, I export to lightroom in tif and effectively it's ok in lightroom after that.
The problem with Adobe raw conversion of infrared photos is that the minimum White-Balance that can be set is 2000K. IR photographs need somewhat less than this, so you need to create a custom profile using the DNG Profile Editor that adds a negative offset to the WB so it looks more correct. The process is explained, here:
wow cool !