(一) 马尾松是广西最常见的主要用材树种。据1974年的调查,全区共有马尾松林4092万亩,但其中残林面积计有1013万亩,占全区马尾松林总面积四分之一以上。近几年来,马尾松残林面积又有所增加。所谓马尾松残林,是指生长失常,未老先衰,难以成林成材的林分。 (A) Masson pine is the most common timber species in Guangxi. According to the survey in 1974, there were 40.92 million mu of Massive Pinus massoniana in the region, but the area of ​​the remaining forest was 10.13 million mu, accounting for more than one quarter of the total area of ​​masson pine in the region. In recent years, Masson pine residual area has increased. The so-called masson pine forest, refers to the growth disorders, not the first premature, it is difficult to become a timber forest.