关键词: 烤烟, 烤烟, 大麦, 花生, 栽培, 间作

Abstract: About 50% of the soils in the Neoteric and Modern Yellow River Delta are affected by salinity. The Geomorphology is a key factor for soil salinization. The hypsography affects the movement of surface and underground runoff, along with it water and salt content in soils are redistributed and accumulated. The objective of this research is to analyze the diversities of characteristics of soil salinization and its reasons in the different scale geomorphology units. On the base of field survey and GPS location and soil sample analysis from May 23 to May 29 in 2002, statistical analyses are used to study the differences of total salt content, pH, organic matter, Cl-/SO42-, HCO3-/(Cl-+SO42-), and (K++Na+)/(Ca2++Mg2+) of soils in the different geomorphology units. Both Kruskal-Wallis Test and Median Test are used to determine if above six parameters differ from each other in geomorphology units with different scales. The research results show that the soils in the neoteric and modern Yellow River Delta are affected strongly by salinity, which belong to coastal chloride type saline soil, and lack organic matter, and are basic. With the depth of soil increasing (0cm~10cm, 10cm~30cm and 30cm~60cm), the degree of salinization becomes less severe; Characteristics of soil salinization in the different geomorphology units with the same scale differ from each other, generally, with the scale lessening (from the first to the fourth level of geomorphology unit) these kinds of differences become quite apparent. Only pH is different between the first level of geomorphology units, and from the second to the fourth level of geomorphology units total salt content of soils in the different geomorphology units are different, and with the depth of soil increasing HCO3-/(Cl-+SO42-) and (K++Na+)/(Ca2++Mg2+) in the different geomorphology unit also become different.