Abstract:

Age-class structure is the main aspect reflecting whether the stand structure is reasonable,and establishing a forest harvest adjustment model is an important way to optimize and adjust the age-class structure.In this study,dominant tree species of Populus and Robiniapseudoacacia were surveyed in Neihuang Forest Farm of Henan province,based on the forest inventory data in the forest farm in 2018,the linear and target planning methods were used to optimize the age structure of the dominant tree species in the forest farm,and euclidean distance and balance rate were used to evaluate the adjustment structure.The results showed that the area distribution of each age-class was balanced at the end of the adjustment period,and the balance rate of the age structure of the two tree species reached 0.96,and the euclidean distance was reduced to more than 85%,and among them, Robiniapseudoacacia was reduced by 100% among the two tree species,which was close to the normal state.The yields of dominant tree species Populus and Robiniapseudoacacia reached 68059.3m³ and 15358.4m³ during the adjustment period,respectively,and the end-of-season stocks accounted for 127.6% and 46.5% of the beginning of the period.The carbon stocks of dominant tree species Populus and Robiniapseudoacacia reached 26797.4 t and 4415.4t at the end of the period,respectively,accounting for 111.3% and 85% of the initial stage.

Key words: stand structure, age structure, forest harvest regulation model, goal planning