杉木人工林伐区调查设计方法对比试验

Comparative Test on Investigation and Design Methods of China Fir Plantation Cutting Area

以全林每木检尺法结果为参照标准,通过对杉木人工林伐区调查设计采用全林每木检尺、标准地、标准带、样圆、角规控制检尺等5种调查方法进行对比分析,结论为:按林木蓄积量、出材量以及出材量分类型、径阶计算出的产值,五种调查设计方法无明显差异。数据精度最高的为标准带调查法,角规控制检尺法次之,标准地和样圆调查法相对误差也达到技术规范要求的10%以内。在工作效率方面,样圆调查法与角规调查法工作效率较高;全林每木检尺法效率最低。在保证一定精度的条件下,综合考虑效率及成本因素,标准带调查法是最优选择。

Based on the results of the whole forest inspection method, the investigation and design of the cutting area of Chinese fir plantation was carried out by using five kinds of survey methods and made comparative analysis： the whole forest, the wooden ruler, the standard ground, the standard belt, the sample circle and the angle gauge control ruler, the conclusion is： according to the amount of forest stocks, the amount of output, and the output value calculated by the type and diameter of the output, there is no significant difference between the five survey design methods. The highest accuracy of the data is the standard belt survey method, the angle gauge control ruler method is second, and the relative error of the standard ground and sample circle survey method is also within 10% of the technical specification. In terms of work efficiency, the round-point survey method and the angle survey method work more efficiently; the whole forest has the lowest efficiency per wood gauge method. Under the condition of ensuring certain precision, considering the efficiency and cost factors, the standard belt survey method is the best choice.