amount of arbor vegetation was 333.0 kg/km2.a, while shrub and herbage vegetation were 508.5 kg/km2.a and 597.0 kg/km2.a, respectively. The P2O5 surplus amount of arbor vegetation was

• 乔木、灌木、草本植被类型的年养分盈余量为乔木氮素养分年盈余量是 333.；0 kg/ km2