【摘要】 生产上有些树种很好,但生根难,影响它的发展。本文以河北杨为例,从树种难生根的内因与外因,较全面地论述了它的生根机理。诸如难生根树种的解剖结构、先成不定根原基的分裂分化、内源激素的作用与外源激素的施加,在理论上有创新,对生产有指导意义。更多还原

【Abstract】 Some good varieties of trees have difficulty in their rooting, which has hindered them from their development. This paper,taking Heei Poplar as an example, overall discussed its rooting mechanism from internal and external factors which caused the difficulty in its rooting,such as its anatomical structure,division and differentiation of analage of adventitious root,the action of endohormone and the application of exhormone.更多还原