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位于偏关县东北部的老营林场,近几年来利用“土箭”捕杀林地害鼠,取得了显著成效,使现有林得到很好的保护,同时也提高了新造幼林的成活率和保存率。该场海拔1200—1800米,年降水量400—550毫米,土层深厚,植被茂密,适宜培育油松等针叶用材林。从1973年以来,营造人工林1.3万余亩,但由于鼠害仅保存9千多亩,平均每年给国家造成2千多元的经济损失。为此,该场在改进营林措施的基础上,在春、秋两季集中时间,集中力量采用“土箭”灭鼠,捕杀率
In Laoying Farm in the northeast of Piao County, the use of “earth arrows” to kill woodlands in recent years has yielded remarkable results, which have made the existing forests well protected and also improved the survival rate and preservation rate of newly-created young forests . The field of 1200-1800 meters above sea level, the annual rainfall of 400-550 mm, deep soil, dense vegetation, suitable for breeding pine and other coniferous timber forest. Since 1973, 1.3 million mu of plantation forests have been created, but due to the fact that only a mere 9,000 mu of rodent pests have been preserved, the average annual economic loss to the country is over 2,000 yuan. To this end, based on the improvement of silviculture measures, the farmhouse focused on using “earth arrow” to eradicate rats and kill rate in the concentrated time of spring and autumn