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由于人类长期不合理的生产活动对植被的破坏,致使辽宁省西部朝阳地区水土流失严重,荒山秃岭比比皆是。该地区年均降水量较少,年际与年内降水分配极不均匀,加之蒸发量太高,促使本区气候干旱。因此,该地区造林难以成活,据统计,采用一般的造林方式造林,其成活率仪为40—50%,保存率不足30%。1986年春,联合国粮援项目——控制辽西水土流失2772工程,以造林和种草为主要任务,在朝阳市辖北票市和建平县总计35个乡的范围内全面展开。我们参加了本工程的部分工作。为了提高农田防护林的造林成活率,我们进行了以灌水、保湿为主的正交试验,以探讨不同因素的影响和综合措施的作用。
Due to the long-term unreasonable human activities on the destruction of vegetation, resulting in water and soil erosion in western Chaoyang region of Liaoning Province serious, bald Ridges abound. The average annual rainfall in this area is small, with extremely uneven distribution of precipitation between years and years. In addition, the evaporation is too high to promote the arid climate in this area. Therefore, afforestation in this region is hard to survive. According to statistics, afforestation using common afforestation methods has a survival rate of 40-50% and a preservation rate of less than 30%. The spring of 1986, the United Nations food aid project - control of soil and water loss in the project 2772 in western Liaoning, with afforestation and grass planting as the main task, in Chaoyang city under the jurisdiction of Beipiao and Jianping a total of 35 townships in full swing. We participated in some of the work of this project. In order to improve the survival rate of afforestation in farmland shelterbelt, we conducted orthogonal experiments mainly based on irrigation and moisturizing to explore the impact of different factors and the role of comprehensive measures.