论文部分内容阅读
湿地松在广东省广为引种，阳江市至１９９２年人工林面积亦已发展至１２万ｈａ。湿地松的生长特性和木材性质对其经营利用有一定影响。从４种不同经营模式比较，由于湿地松早期生长迅速，脂、材均可利用，１０年生即可开始采脂和间伐。其中以第４种经营模式的经济效益最佳，即１０年生开始第１次间伐，伐前强化采脂２年；１５年生作第２次间伐，代前强化采脂３年；１８年生开始连续采脂７年，２５年生时主伐。发展湿地松是广东山区致富的重要出路之一，对改善我省造纸资源和松脂质量关系密切。
Slash pine is widely introduced in Guangdong Province. From 1992 to 1992, the plantation area of planted forest has also increased to 120,000 ha. Growth characteristics and wood properties of P. elliottii have some impact on their management. From the comparison of 4 different management modes, since the early growth of Pinus elliottii can be utilized, both lipid and wood can be used, and the greasy and thinning can begin at 10 years old. Among them, the economic benefit of the fourth business model is the best, that is, the first thinning is started at the age of 10, and the fat extraction is intensified for 2 years; the second thinning is carried out at the age of 15 years, and the fat extraction is intensified for 3 years; Grease 7 years, 25 years old when the main cutting. The development of Slash Pine is one of the important ways to get rich in mountainous areas of Guangdong, and it is closely related to improving the quality of paper resources and pine resin in our province.