Answer : No.
Surprisingly, although a straight probationary sentence is authorized for manslaughter in the second degree, if a sentence of imprisonment is imposed it must be an indeterminate State sentence. Thus, neither local time nor a split sentence is authorized.GungaWeb handles the question like this:
Click on Article 125, then PL 125.15 to retrieve the charge. Scroll down to the Sentences function area, and click on Sentences to obtain a Sentencing Report as follows
Observe that the proposed disposition is unavailable. Further investigation would show that a plea to the lesser included offense of criminally negligent homicide, a class E felony, is permissible, and would permit imposition of the desired split sentence.