爆破水平梯田整地技术及经济效益研究

太行山低山石质丘陵区多处于山西背斜东部边缘,花岗岩、片麻岩、砂岩等广泛分布,物理风化层较厚,但土层较薄,一般小于30cm。该区山场面积大,光热资源丰富。年平均气温7.4—13.9℃,大于0℃的积温为3479—5900℃;年均降水500—600mm,无霜期180—200天,对发展经济林具有得天独厚的条件。但阳坡太阳直射,受热量大,土壤墒情差,肥力不足,不利于林木的生长。采用爆破技术进行大规格高质量的水平梯田整地,可以扩大土壤容量因素,聚集地表迳流,是石质低山丘陵区发展经济林生产切实可行的技术措施。一、自然概况和试验方法

RESEARCH IN EXPLOSION TECHNIQUE AND ITS EFFECTS FOR SITE PREPARATION

To make level terraces for planting trees in mountainous areas in northern China, an explosive technique was developed for intansive site preparation. It was found that the phisical and chemical properties of soil could be very much improved through explosion and the sheet erosion was also obviously reduced. Another effect of explosion on site was that more suitable environment was created for the development of tree root systems. This technique was particularly effective measure for establishing economic forest plantations on rocky sites. It was also found, however,that the effects varied with explosion depth and explosive amount.