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一、概况彰武县位于辽宁省西北部,属科尔沁沙地东部,沙比强度发展地区。全县土地面积520.7万亩,其中风沙土为175.7万亩,占总土地面积33.7%。土壤肥力很低,平均有机质含量为0.82%,碱解氮43.34PPM,速效磷1.35PPM,速效钾含量为126PPM。植被稀疏,草质不佳,多以菊科、禾本科植物占优势。植物生物量不高。气候特点是雨、热同季,年降水量400～500mm,春季干旱,雨水多集中于7、8两月(占全年的53%)。风的危害比较严重,四级以上风速频率240次,六级以上大风日,每年可达69次,植物生长期为150天。
First, an overview Zhangwu County is located in the northwestern Liaoning Province, is Horqin sandy east, sand than the intensity of development. The county land area of 520.7 hectares, of which sandy soil is 175.7 hectares, accounting for 33.7% of the total land area. Soil fertility is very low, the average organic matter content of 0.82%, alkaline hydrolysis of nitrogen 43.34PPM, available phosphorus 1.35PPM, available potassium content of 126PPM. Sparse vegetation, poor grass quality, and more Compositae, grasses dominant. Plant biomass is not high. The climate is characterized by rain, hot season, the annual rainfall of 400 ~ 500mm, spring drought, rain and more concentrated in July and August (accounting for 53% of the year). Wind hazards more serious, more than four wind speed 240 times, windy six or more days, up to 69 times per year, plant growth period of 150 days.