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Nanjing Forestry University (南京林业大学) 2021

Soil Ecological Properties in an Arid Area of West of China


Titre : Soil Ecological Properties in an Arid Area of West of China

Auteur : 丁菡

Grade : Master 2021

Université : Nanjing Forestry University (南京林业大学)

Résumé partiel
As we know, ecology problem must be placed at the first in the west development. The experimental plots were located in Shahu of Ningxia autonomous region in order to investigate and analysis this area’ soil physical and chemical properties, biological activity and so on. This will be benefit the soil exploitation and utilization of these kinds of regions in the future through providing some basic data and materials. The main results obtained are as follows:1. The soil physical and chemical properties are very different in this region’s different plots. As far as soil texture is concerned, the content of silt particles is highest with the average of 45.03% and the content of clay particles is lowest with the average of 24.69% in every soil separates. The content of sandy particles is in middle and it was variation in all different plots and soil layers, so we can mainly dependent in the content of sandy particles to distinguish different soil texture in this region. The soil water content is very low, and the lowest value is less than 1%. The soil water increased from the top layer to the bottom layer with the great variances in different layers. The bulk density is increased from top layer to the bottom layer, meanwhile the soil porosity is decreased. The bulk density and the soil porosity are significant vary in different soil layers and are even in different plots. The soil erodibility presents a increased trend with the deepening of the layers.2. The soil’s chemical properties also present theirs distinguishing features. The PH value is very high in this region for all plots’ PH value are higher than 8. The top soil layer is lowest in pH value, because there are more trees or grasses’ organism that can improve the soil’s chemical properties. This region is short of soil organic matter for the average value is less than 1%. The content of soil organic matter is highest in the top layer and decreased from top layer to bottom layer.

Mots clés : Arid area ;soil physical and chemical property ;Soil organic matter ;Soil enzyme activity ;Erodibility;

Présentation (CNKI)

Page publiée le 23 février 2022