最近,林业部通报了1991年度人工造林、更新合格面积保存状况调查情况。主要内容如下: 一、保存状况调查情况:全国 1991年度人工造林、更新合格面积(间隔4年)的保存率为 93.2％,其中,人工造林的保存率为 92.8 ％,人工更新的保存率为 96.6％,三项保存率比1990年度都略有下降,除有的省、自治区、直辖市遭受严重旱涝灾害外,一些地方造林后不重视抚育和管护工作,是造成保存率下降的重要因素。 二、各省、自治区、直辖市保存状况:21个省、自治区、直辖市的人工造林、更新 Recently, the Ministry of Forestry informed the investigation of artificial afforestation and the preservation of qualified areas in 1991. The main contents are as follows: First, the preservation status survey: National 1991 artificial afforestation, update the qualified area (interval of 4 years) the preservation rate of 93.2%, of which the artificial afforestation preservation rate was 92.8%, artificial renewal preservation rate was 96.6 %, The three preservation rates declined slightly compared with those in 1990. Except for some provinces, autonomous regions and municipalities directly under the Central Government suffered severe drought and flood disasters, some places did not attach importance to tending and management after afforestation, which was an important factor that caused the decline of the preservation rate. II. Preservation of Provinces, Autonomous Regions and Municipalities: The Afforestation and Renewal of 21 Provinces, Autonomous Regions and Municipalities