论文部分内容阅读
一、前言杉木是福建最重要的用材树种,建国以来全省历年平均提供70万立方米(计划内),历年平均造林面积80万亩。科学实验如良种选育、实生苗造林、立地评价、整地方式、抚育间伐及病虫害防治方面也取得不少成绩。但过去的营林实践及科学研究多重于人工林,天然杉木林则很少问津。据现有材料估测本省的天然杉木混交林的面积至少在50万亩以上。这些林子虽然比较分散.日密度、年龄、径级都较零乱,但这些杉林的历史较长“饱经沧桑”,经
I. Introduction Cunninghamia lanceolata is the most important timber species in Fujian. Since the founding of the People’s Republic of China, the province has provided an average of 700,000 cubic meters (planned) over the years, with an average of 800,000 mu of afforestation area over the years. Scientific experiments such as seed selection, seedling afforestation, site evaluation, site preparation methods, tending thinning and pest control have also made many achievements. However, the past practice of forest management and scientific research are more than plantations, natural fir forest seldom cares about. According to the available materials, it is estimated that the area of natural fir mixed forest in this province is at least 500,000 mu. Although these woods are scattered, their daily density, age and diameter are rather chaotic, they have a long history of "