论文部分内容阅读
苗木是造林的物质基础。实践证明,用高质量的苗木造林,不仅成活率高,而且对不良环境的抵抗力强,生长健壮,能培育成速生、丰产、优质的林分。苗木的质量首先反映在标准上。因此,需要通过制定标准和贯彻标准建立起一整套的技术措施,才能保证苗木质量的提高。国外经营水平高的人工用材林,每公顷年生长量在15米~3以上,世界水平为3米~3,我国是1.8米~3。国外能达到这样高的水平,主要是抓了良种壮苗。但是也有不注意良种
Seedlings are the material basis for afforestation. Practice has proved that afforestation with high-quality seedlings, not only high survival rate, but also strong resistance to adverse environment, robust growth, can grow into fast-growing, high yield, high-quality stand. The quality of seedlings is first reflected in the standard. Therefore, the need to establish standards and standards to establish a set of technical measures to ensure the quality of seedlings. The foreign timber plantation with high management level has an annual growth rate of 15 meters to 3 per hectare, world level of 3 meters to 3, and China’s 1.8 meters to 3 meters. Abroad to reach such a high level, mainly caught a seed strong seedlings. But there are also pay attention to good seed