Defoliation may decrease photosynthesis rate of undefoliated ramet, but severing stolon and shading ramets did not significantly influence photosynthesis rate of undefoliated ramet.

• 野牛草去蘖后会降低未去蘖分株的净同化活度，切断匍匐茎不会显著影响分株的净同化活度，遮荫也不会显著影响相连分株的净同化活度。