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一、基本情况前查干大队位于辽宁省阜新蒙古族自治县西北边缘的福兴地公社,临近内蒙古科尔沁沙地,石质低山丘陵,号称“塞北沙荒”,自然条件很差。风沙干旱,年降雨量430毫米左右,水面蒸发量1,450—1,500毫米,干燥度>1.25。年均气温6.3℃,有效积温3,200℃左右,无霜期130—135天。年平均风速4米/秒,春季4至6月每月干旱风日(13点气温≥25℃,相对湿度≤30%,风速≥5米/秒)达12天之多。春旱严重、伏旱、秋吊、早霜和冰雹的发生率均高。全大队土地总面积15,000亩,其中平原约占15%,丘陵占35%,山地占40%,余10%是干河套和冲刷沟等。1965年前仅有残林780亩,覆被率仅5%,500米以上的大冲刷沟有8条,
First, the basic situation Qianqiang brigade located in Fuxin Mongolian Autonomous County of Liaoning Province on the northwestern edge of Fuxing commune, near Horqin sandy land in Inner Mongolia, stony hilly, known as “Saibei sand shortage”, poor natural conditions. Aeolian aridity, annual rainfall of about 430 mm, the water surface evaporation 1,450-1,500 mm, dryness> 1.25. The average annual temperature of 6.3 ℃, effective accumulated temperature of about 3,200 ℃, frost-free period of 130-135 days. The average annual wind speed is 4m / s. From April to June, the monthly arid wind days (13 ℃ air temperature ≥25 ℃, relative humidity ≤30% and wind speed ≥5 m / s) reach more than 12 days. Severe spring drought, drought, autumn hanging, early frost and hail incidence are high. The total land area of 15,000 acres of the entire brigade, of which about 15% of the plain, hilly 35%, 40% of the mountain, the remaining 10% is dry Loop and erosion ditch. Before 1965, only residual forest 780 mus, coverage rate of only 5%, 500 meters above the large scouring groove has 8,