Abstract:

Based on the overall on-the-spot survey, combined the typical investigation and fixed position measurement, the coastal protection forest of Pinus thunbergii in Shandong Province was studied. The site conditions of the coastal protection forest were evaluated by means of the quantitative theory I and divided into 11 types, then classified the stand into three height classes by systematic cluster analysis. The results showed that the tree height for class Ⅰis the highest, classⅡis medium and the classⅢ is the lowest. Then based on the comprehensive analysis of the protection maturity and quantitative maturity, the protective maturity period(PMP)of the coastal protection forest for classⅠto Ⅲ were 15～57 a, 14～32 a, and 13～28 a respectively, the regeneration period(RP)were 33～57 a, 23～32 a and 21～28 a respectively, and the reasonable regeneration age(RA)were 33 a, 32 a,and 28 a respectively.

Key words: Sandy coast, Pinus thunbergii, Coastal protection forest, Protective maturity period, Regeneration period, Regeneration age