河西走廊临泽样区土壤生产潜力初步研究

根据“中国土壤系统分类中基层分类研究”的要求，以河西走廊临泽样区为例，在已有研究的基础上，应用层次分析法，以土壤资源、地貌条件和土地利用作为评价单元，选取土层厚度、有机质、土壤质地、PH值、地貌类型、坡度、海拔高度、土地利用现状等8项要素作为评价因子，对样区土壤生产潜力适宜性进行了初步研究，并得出结论：宜农一等地，包括兰家堡系、倪家下营系；宜农二等地，包括东三村系、化音系和曹家庄系；宜农三等地，包括五三村系、盘石营系和曹家湖系；不宜地，包括南山坡滩系，王家墩东滩系、上府寺系和梁家湖系。本研究对于绿洲农区合理、有效、可持续的利用土地资源，使其最大程度的发挥土地生产潜力，具有指导意义。

STUDY ON PRODUCTIVE POTENTIALITY OF SOIL RESOURCES OF LINZE ZONE OF HEXI CORRIDOR,CHINA

Based on the former work and the accumulated information and taking the Linze region in the Hexi corridor, Gansu Province, as an example, the productive potentiality of soil is studied by using AHP methods in this paper. Soil resource, physiognomy conditions and land use are chosen as evaluated units, which include many factors, such as organics in soil, soil character, pH value, slope, height above sea level, land use actuality. The evaluation model on productive potentiality and suitability of Linze zone in the Hexi corridor is founded based on above evaluated units and factors, the evaluated results are obtained as follows:(1)The area of high grade land suitable for farming is 4 025.44hm 2, which makes up 10.56 percent of the total area of studied region.(2)The area of middle grade land suitable for farming is 8 270.65hm 2, which makes up 19.70 percent of the total area of studied region.(3)The land area of low grade land suitable for farming is 1 176.41hm 2,which makes up 8.41 percent of the total area of studied region.(4)The area of land unsuitable for farming is 2 4520.54hm 2, which makes up is 61.33 percent of the total area of studied region.