论文部分内容阅读
黄河大堤两旁的树林,它不仅有助于堤防的巩固,且给河防用料提供了有利条件,给国家创造了财富。但某些县段由于对植树的积极意义认识不足,对上级几年来逐渐绿化大堤的指示,缺乏认真研究和贯彻,因此在工作中发生了不少问题。首先在种植当中,缺乏技术研究和统一的布署,因此栽种的紊乱,成活率极低。如以高青八十七华里长的大堤,历年光种柳树计十万多株,据现
The woods on both sides of the embankment of the Yellow River not only contribute to the consolidation of the embankment, but also provide favorable conditions for river defense materials and create wealth for the country. However, due to the lack of understanding of the positive significance of tree planting in some county sections, there were not enough researches and instructions on the instructions for gradually greening the embankments in the past few years. Therefore, many problems occurred during the work. First of all, there is a lack of technical research and unified deployment among the planting areas. Therefore, planting disorders and survival rates are extremely low. As to the Qinghai eighty-seven years in the long embankment, the calendar year willow species count more than 100,000 strains, it is reported