论文部分内容阅读
安康专区位于东经108°06′—110°17′,北纬31°41′—33°52′,包括石泉、紫阳、汉阴、安康、岚皋、平利、洵洋、白河八县。全区耕地面积五百万亩,占总耕地面积的14.35％。根据1959年土壤普查资料,黄泥巴在安康专区共有117万亩,占全区耕地面积23.4％。 一、黄泥巴的形成与环境条件的关系 黄泥巴的形成首先是母质的来源和种类决定了土壤骨架,在自然形成阶段,其前身黄褐土,是在暖润气候条件,常绿阔叶林和落叶阔叶林下的产物;开垦以后在人为因素、地形和气候等外动力的作用下,形成了黄泥巴。
Ankang Prefecture is located at 108 ° 06’-110 ° 17’E and 31 ° 41’-33 ° 52’N, including Shiquan, Ziyang, Hanyin, Ankang, Langao, Pingli, Yangyang and Bahe. The region’s arable land area of five million mu, accounting for 14.35% of the total arable land. According to the 1959 Soil Census, Wong Nai-Pak has a total area of 117 mu in Ankang, accounting for 23.4% of the total cultivated area. First, the formation of yellow mud and the environmental conditions of the relationship between the formation of yellow mud The first is the formation of the source of the parent material and the type of the soil determines the framework of the soil, in its natural formation stage, its predecessor, yellow cinnamon, is in the warm climate conditions, evergreen broad-leaved forest And deciduous broad-leaved forest products; reclamation after human factors, topography and climate and other external forces, the formation of a yellow mud.