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杂交杨是我省平原地区防护林网建设的主栽树种,约占林网树木总量的50%。由于杨树生理生长期较短,林网更新频繁,在我省对林网的更新尚未突破传统的采伐植苗更新模式。按传统方式更新后林网的防护效能需要3年甚至更长的时间才能恢复。长期以来,伐根被挖出烧掉,没有得到充分利用,甚至在一些地方出现采伐容易栽活困难,年年栽树不见树、年年造林不见林的现象,使林网控制区的生态环境和农业生产都受到一定程度的影响。推广杂交杨大树伐根嫁接改造技术不但能够实现快速更新的目的,同时还能创造更高的经济价值,促进地方环境建设和经济发展。这一技术在我省沽源县和任丘市等地已有应用,并且取得了良好的效果。
Hybrid poplar is the main planting species in the construction of shelterbelts in the plain of our province, accounting for about 50% of the total amount of trees in the shelterbelts. As the physiological growth period of poplar short, frequent updates of the forest network, in our province to update the forest network has not yet broken through the traditional mode of harvesting seedlings. After the traditional way to update the protection effectiveness of the forest network takes 3 years or even longer to recover. For a long time, the sprouts have been excavated and burnt out, and have not been fully utilized. Even in some places, logging is easy to plant and hard to survive. Trees are planted year after year without trees, and forests are not seen year by year. The ecological environment And agricultural production are affected to some extent. Promote the hybrid poplar tree grafting transformation technology not only to achieve the purpose of rapid updating, but also to create higher economic value and promote local environmental construction and economic development. This technology has been applied in Guyuan County and Renqiu City in our province and has achieved good results.