大兴安岭地区的水土流失及其防治

<正> 一、大兴安岭地区的自然经济概况 黑龙江省大兴安岭地区,地处我国北部边陲,位于东经121°34′～127°02′,北纬58°08′～53°34′,总面积约8.47万km~2。本区在地质构造上属新华夏系第三隆起带,大部由火山岩构成。土壤北部山地为棕色针叶林土,丘陵区主要为暗棕壤。地势西北部和西部高,东部与南部低,山脉宽约200～300km,东陡西缓,海拔高度300～1400m,相对高度一般为100～200m。山地起伏和缓,山顶浑圆,大部为低山丘陵,且多

Soil and Water Loss in the Great Xing' an Mountain area and Its Prevention

The Great Xing' an Mountain area in Heilongjiang Province is an important forest zone and timber production base in China. After the great forest fire in 1987, as a consequence the enlargement the area of exposed land accelerated the soil and water loss, causing frequent flood disasters, the forest ecosystem worsens rapidly, threatening local industrial and agricultural production. Through inspecting the local natural economy, soil and water loss and its harmfulness, prevention and management measures were put 昮orward in this paper for forest renewal in the fired forest land rational cutting and comprehensive prevention and harnessment.