Nutrition-addition effect
The values of nutrition-addition effect were higher than zero except the
one on S. grandis in mixture with L. chinensis . The
nutrition-addition effect was significantly influenced by the effects of
target species, plantation condition and their interaction. RegardingS. grandis , the nutrition-addition effect was lower in mixture
with L. chinensis than grown in any of the other plantation
conditions. As for S. krylovii , the nutrition-addition effect was
relatively lower in mixture with L. chinensis or A.
cristatum than in any of the other two conditions. Compared with the
mean value of S. grandis in the same plantation conditions, the
nutrition-addition effect of S. krylovii was relatively lower in
mixture with A. cristatum but was relatively higher in any of the
other three plantation conditions (Fig. 4).