湖北林业科技

This paper reports the characteristics and differences of diameter-grade structure and height-grade structure of natural secondary forests with Castanopsis fargesii as dominant species under different management measures of two weak thinning (TCR), two intensive thinning (TCQ) and no thinning (TCK), and analyses the curve of diameter-grade (height-grade) and tree number distribution. The results showed that both diameter-grade structure and height-grade structure of TCK treatments were concentrated in the low-level range, and the diameter-grade (height-grade) distribution of TCK treatments was inverted "J" type with abundant reserve resources. The diameter-grade structure and height-grade structure of trees treated with TCQ tended to concentrate on the high-level distribution, and the radial and vertical growth of retained trees were improved. The relationship between diameter-grade (height-grade) and tree number was normal distribution, and the single peak was on the right, which was suitable for the cultivation direction of large-diameter timber forests. The diameter-grade and height-grade structure of trees treated with TCR were between those treated with TCK and TCQ, which was more suitable for cultivating edible fungi forests of small and medium size.