Differential Characteristics Of Soil Nutrients Content Of Periglacial Landform Of Mt. Laotudingzi In Liaoning Eastern Mountains

Mt. Laotudingzi in Liaoning Eastern Mountains is located in the eastern mountain area of Liaoning Province, it’s widely distributed periglacial landform of rock-block field, stone river, rock slope, the area of the region accounted for about 15% of the forestry land area, the Area ratio is higher. The soil in the periglacial landforms is filled between the gravel, or overlaid with gravel, so it is with good cementation and holding the action of water, at the same time it provides fixed base and food base for periglacial landforms of plant growth and development, thus maintaining the stability of periglacial landform ecosystem.The study put the soil of periglacial landforms of Mt. Laotudingzi in Liaoning eastern mountains as the study area, adopting the research method of soil sampling and laboratory measurement analysis, collecting 48 soil samples and conducting X fluorescence scanning, we studied the soil nutrients content, differential characteristics and influence factors of rock-block field, stone river, rock slope, 3 kinds of periglacial landform of Mt. Laotudingzi in Liaoning Eastern Mountains. The results shows:(1) The content of large nutrient elements of N, K, Ca, Mg, P, S, Si is changing between 0.93~210.55 g.kg-1 in rock-block field, stone river, rock slope in Mt. Laotudingzi, the content of micronutrient elements of Cl, Fe, Mn, Na, Zn, Cu, Ni is changing between 27.59~26758.8 mg.kg-1. The results of significant difference analysis showes that the content of Ca and Mg in soil in significant differences between 3 types of periglacial landforms(P<0.05), the differences of other nutrient element content were not significant(P>0.05).(2) The results of significant difference analysis shows, the content of Zn in soil in significant differences between broadleaved deciduous forest, theropencedrymion, dark coniferous forest, elfin forest, bushwood, meadow thicket 6 vegetation types, the differences of other nutrient element content were not significant(P>0.05).(3) Slope, slope direction, altitude, litter content and soil p H factor have different degree of influence on soil nutrients content of periglacial landforms of Mt. Laotudingzi. The slope larger than small is more conducive to the preservation of soil nutrient, sunny soil nutrient elements in general is richer than that in shady slope, soil nutrients in high altitudes is richer than that in lower altitudes. The relationship between litter content, soil p H and soil nutrient content is more complex, the law of change of forest litters in different vegetation types is consistent with the content of large nutrient elements. The results of correlation analysis showes that the different vegetation types of litter content is positively correlated with the content of large nutrient elements in soil(R=0.332, P<0.05, n=48).In addition, there is a close correlation between the contents of nutrient elements essential to plants in the soil of the study area, for the performance of each other between the soil nutrient elements is given priority to with synergistic effect.