Click for new scientific resources and news about Corona[COVID-19]

Paper Information

Journal:   IRANIAN JOURNAL OF SOIL AND WATER RESEARCH   2008 , Volume 39 , Number 1; Page(s) 15 To 30.
 
Paper: 

CHANGE IN SOME SOIL QUALITY PARAMETERS AS AFFECTED BY LAND USE IN DIFFERENT SLOPE POSITIONS OF LOESSIAL LANDS, EASTERN GOLESTAN PROVINCE

 
 
Author(s):  AJAMI M., KHORMALI F.*, AYOUBI SH.
 
* COLLEGE OF AGRICULTURE, GORGAN UNIVERSITY OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES
 
Abstract: 

As a result of fast population growth, natural land covers, especially forests, are being degraded by humans because of getting dedicated to crop production. Release of large amounts of carbon and greenhouse gases is an unfavorable result of natural land use change. For a study of the changes in different soil quality attributes, loessial hillslope of eastern Golestan Province, Agh-Su Watershed, was selected. An estimate of about two hundred soil samples were taken from surface (0-30 cm) and subsurface (30-100 cm) layers of lands with two different kinds of land uses, namely forest and adjacent cultivated land. The study showed that long-term tillage practices had resulted in change of soil texture from silty clay loam to silty loam, the latter being very susceptible to further erosion. The change is related to a loss of clay particles as a result of the previous erosions. Severe changes in soil texture and an increase in the amount of silt particles in subsurface layers are also quite conspicuous. This change can indirectly affect such other soil quality parameters as organic matter. Mean weight diameter of aggregates decreased from 1.49 mm in forest to 0.88 mm in adjacent cultivated land areas. Bulk density is increased while infiltration rate reduced by about fifty percent due to a degradation of soil structure and the resulting compaction. A reduction in the amount of annual organic matter return into soil as a result of deforestation and its subsequent weak physical protection of organic matter were responsible for a decrease in the amount of organic carbon and total nitrogen by 70%.Consequently a microbial respiration decrease from 0.19 mg C02/g day to 0.1 0 in deforested areas. Changes in soil quality attributes were not observed to be significant in different slope positions of forested areas due to stability of the landscape. The effect of different slope positions on soil quality attributes is more significantly pronounced in cultivated areas than in forest lands.

 
Keyword(s): SOIL QUALITY, LAND USE CHANGE, SLOPE POSITION, LOESS, GOLESTAN PROVINCE
 
References: 
  • ندارد
 
  Persian Abstract Yearly Visit 64
 
Latest on Blog
Enter SID Blog