论文部分内容阅读
一、自然地理特征及治理前后概况:南小河沟是泾河支流蒲河左岸的一条支沟,位于庆阳县西峰镇西南,大部属后官寨公社所辖。拔海1050—1423米,小流域面积36.3平方公里,塬面占57%,沟壑占43％,流域内有13个大队,61个生产队,1579户,8323人;共有支毛沟183条,总耕地面积2.53万亩,塬地占93％,山地占6.6％,沟坝地占0.4％,耕垦指数46.3％。塬心土壤为黑垆土,含有机质0.9％左右,全氮0.07%,比较肥沃;塬边为黄绵土,含有机质0.7％,
First, the natural and geographical characteristics and governance Before and after the overview: South Xiaohe River is a tributary of the tributary of the tributary of the Pu River, a branch ditch, located in Qingyang County, Xifeng town southwest, most of the government under the jurisdiction of the village. Pull the sea 1050-1423 meters, a small watershed area of 36.3 square kilometers, 57% plateau, gully 43%, the basin has 13 brigade, 61 production team, 1579, 8323 people; The total cultivated area is 25,300 mu, with 93% of the highland, 6.6% of the mountain, 0.4% of the ditch dam and 46.3% of the land reclamation index. The loamy soil is black loam soil, which contains about 0.9% of organic matter and 0.07% of total nitrogen, and is relatively fertile. The upper edge of loessial soil contains 0.7% of organic matter,