论文部分内容阅读
实验区位于安塞县境内的延河中上游地段,包括延河支流杏子河下游的茶坊等三个大队和县南沟流域五个大队。总土地面积78.4平方公里,折合11.76万亩。全区共有718户,3,469人,每人平均土地面积33.9亩,宜林荒山面积3.85万亩。本区地处陕北黄土丘陵沟壑区第二副区,区内地形破碎,土壤贫瘠,植被稀疏,水土流失严重。年平均降水最549.1毫米,7—9月为雨季,降水量占年平均降水量的61.1％;年平均气温8.8℃,年绝对最低气温-23.6℃;海拔高度1,000—1,400米。
The experimental area is located in the middle and upper reaches of the Yanhe River in Ansai County, including three brigades such as the Tea House in the lower reaches of the Xinghe River and the five brigades in the county’s Nangou Valley. The total land area of 78.4 square kilometers, equivalent to 117,600 mu. The region has a total of 718 households, 3,469 people, an average of 33.9 acres of land per person, irrigated mountain area of 38500 acres. The district is located in the second sub-district of loess hilly and gully regions in northern Shaanxi. The terrain is fragmented, the soil is barren, the vegetation is sparse and soil erosion is serious. The annual average rainfall of 549.1 mm, July-September is the rainy season, precipitation accounted for 61.1% of the annual average precipitation; annual average temperature of 8.8 ℃, the absolute minimum temperature of -23.6 ℃; altitude of 1,000-1,400 meters.