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过去,在设计造林技术和密度时,往往注意林木地上部分的生长发育多,而对根系发育状况考虑较少。但树木是一个有机体,各器宫之间互相促进,互相制约。尤其是树木的根系,不仅对地上部分起着支撑作用,而且起着吸收和输导水分、养分的重要作用。同时它还能合成许多重要物质供树木生长发育用。因此,根系对地上部分的生长起着决定的作用。但其发育状况又和土壤、造林技术等有密切的关系。为了解这种关系,
In the past, when designing afforestation techniques and densities, it often paid attention to the growth and development of above-ground parts of forest trees while less consideration was given to the development of the root system. But the tree is an organism, each palace between each other to promote mutual restraint. Especially the roots of trees, not only plays a supporting role on the ground, but also plays an important role in absorbing and transporting moisture and nutrients. At the same time it can synthesize many important materials for the growth of trees. Therefore, the root system plays a decisive role in the growth of above-ground parts. However, its development is closely related to soil and afforestation technology. To understand this relationship,