截止2006年底,西吉县累计退耕造林65万亩。为进一步提高造林成活率,西吉县林业科技工作者通过大胆探索与试验,得出冬季造林成活率高出春季的结论,较好地解决了春季造林成活率达不到要求的难题。1造林地的自然概况西吉县地处大陆性气候带边缘,属于中温带半湿润到半干旱过度地区。土壤中性偏碱,黑垆土。年 By the end of 2006, Xiji County has accumulated 65 million mu of converted forests. To further improve the survival rate of afforestation, Xiji County forestry scientists through bold exploration and experiment, concluded that the winter afforestation survival rate higher than the spring conclusion, better solve the spring afforestation survival rate of less than the required challenge. A natural overview of afforestation land Xiji County is located in the edge of the continental climate, belonging to the temperate semi-humid to semi-arid areas. Soil neutral alkaline, black clay soil. year