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丘陵区造杉的树下工程,是以改地适树为中心,同时进行水土保持、修筑林道的杉木造林地的基本建设工程,也是在丘陵区平衡土壤与杉木生长发育生态环境,促使杉木速生成林、成材的一项重要措施。我县位于东径110度26分54秒,北纬28度54分17秒。年平均气温16.5℃,极端低温-15.8℃,极端高温40.6℃,年降雨量1440毫米,蒸发量1200毫米,相对湿度82%,无霜期280天,平均日照1571小时。
Hilly area fir tree under construction, is to change to appropriate tree as the center, at the same time soil and water conservation, the construction of forest road afforestation of the basic construction of the fir, but also in the hilly areas balance the growth of soils and fir ecological environment, and promote fir speed Generate forest, timber an important measure. My county is located east of 110 degrees 26 minutes 54 seconds, latitude 28 degrees 54 minutes 17 seconds. Annual average temperature of 16.5 ℃, extreme low temperature -15.8 ℃, extreme high temperature 40.6 ℃, annual rainfall of 1440 mm, evaporation 1200 mm, relative humidity of 82%, frost-free period of 280 days, an average of 1571 hours of sunshine.