论文部分内容阅读
一、调查的目的及地区调查的目的是了解云南松天然更新与环境条件的关系,及过去执行的各种采伐方式和更新措施对云南松天然更新的影响,为制定云南松采伐方式和更新措施提供依据。调查地区有:拉祜林区的仁和和长箐林场;楚雄林区的新村林场和南盘江林区的一场和五场。这些地方大体上代表了云南省云南松主要分布区的情况。拉祜林区在云南省北部金沙江中游,是海拔高度1000—2500米的中山。山体由花岗岩(仁和)及砂岩(长箐)构成。山
First, the purpose of the survey and the purpose of the regional survey is to understand the relationship between the natural regeneration of Yunnan Pinus and environmental conditions, as well as the implementation of a variety of harvesting methods and the update of the natural regeneration of Pinus yunnanensis in order to develop the harvesting methods and updates of Pinus yunnanensis Provide evidence. The survey areas are: Renhe and Changbaochang Forest Farm in Lafarge Forest Zone; and Xinchang Forest Farm in Chuxiong Forest Zone and five games in Nanpanjiang Forest Zone. These places generally represent the main distribution areas of Pinus yunnanensis in Yunnan province. Lahulin forest area in the northern Jinsha River in Yunnan Province, is an altitude of 1000-2500 meters Zhongshan. The mountain is composed of granite (Renhe) and sandstone (Changba). mountain