Investigation and Analysis on the Growth of Different Stand Densities and Site Condition in the Second Generation Sprouting Forest of E.urophylla×E.grandis
In order to explore the optimal stand density and site control of E.urophylla× E.grandis second genera-tion sprout regeneration forest with different cultivation objectives,the growth of E.urophylla×E.grandis second generation sprout regeneration forest with different stand density was investigated and analyzed.The results showed that the growth of E.urophylla× E.grandis second generation sprout regeneration forest was greatly affect-ed by the stand density.For the cultivation goal of small and medium-sized diameter timber,the appropriate stand density should be controlled at 2050 plants.hm2 with good growth and high yield.The tree height,chest di-ameter,and the timber points reached 15.64 m,13.25 cm,and 0.1047 m3,and the standing timber volume reached 183.98 m3.hm2;The forest with a density of 1350 plants.hm2 has good growth,sufficient stamina,and a large pro-portion of dominant trees,making it suitable for density control as a cultivation target for medium to large diame-ter timber;The quality of the site also has a significant impact on the growth of the sprout forest.The growth of the sprout forest in Class Ⅱ land is significantly or extremely significantly higher than that in Class Ⅲ land.To ensure a high yield of the second generation regeneration forest of E.urophylla× E.grandis,Class Ⅱ land should be selected as much as possible for second generation sprout regeneration.For poor site,the implementation of sec-ond-generation sprout regeneration has limited growth potential.
E.urophylla×E.grandissprout regenerationstand densitysite condition stand growth
万方数据
维普
