论文部分内容阅读
苗木调查的目的是要获得单位面积上可靠的苗木产量和质量数据。而且要求精度高,工作量小。但是,建国三十多年来,在科学研究上和生产上所用的调查方法如标准行法,对角线法和标准地法等,要求调查的面积为调查区内总面积的2—4％,所以调查工作量很大。由于制定全国主要造林树种苗木产量、质量标准的需要,为了减少调查工作量,提高苗木调查精度,给制定苗木产量、质量标准的苗木调查工作提供科学依据。我们进行了苗木产量、质量抽样调查与计算方法的研究。
The purpose of the seedling survey is to obtain reliable seedling yield and quality data per unit area. And require high precision, small workload. However, since the founding of the People’s Republic more than 30 years ago, the survey methods used in scientific research and production, such as standard method, diagonal method and standard method, require that the survey area be 2-4% of the total area in the survey area, , So the workload of the investigation is very large. In order to reduce the survey workload and improve the accuracy of seedling surveys, it is necessary to establish the production and quality standards of seedlings and seedlings of the major afforestation trees in the country and provide a scientific basis for the investigation of nursery stock production and quality standards. We conducted seedling yield, quality sampling survey and calculation methods.