Effect of Land Use Change from Rangeland to Agricultural Land on Soil Fertility in Taftan Region

Document Type : Research Paper

Authors

Abstract

This study was conducted to investigate the effects of rangeland conversion into agricultural
land use on soil properties in Taftan region (Sistan and Baluchestan province). Four land use types
were selected including horticultural, irrigated alfalfa farm, abandoned rainfed agriculture and
rangeland. Considering each land use area, soil samples (4-6) were taken from 0-30 cm depth in a
completely randomized design. Some soil properties such texture, pH, electrical conductivity,
organic matter, total nitrogen, available phosphorus, available potassium, labile carbon and CaCO3
were measured. Results revealed that in the horticultural land use compared to the rangeland one,
there was no significant difference among soil characteristics except for the phosphorus and labile
carbon factors, while labile carbon and phosphorus had higher amounts in the horticultural land use.
The results revealed that just the nitrogen amount had a significant difference between the irrigated
farm and rangeland and the level of nitrogen in irrigated farm was higher. The electrical
conductivity amount had a significant difference in abandoned agriculture and the rangeland, as
salinity in the abandoned agriculture was more. Analysis of variance showed that there were
significant differences among the all properties of the soil in different land uses except phosphorus,
potassium and CaCO3. The highest amounts of nitrogen, phosphorous and organic carbon were
measured in the irrigated farm. The highest amount of potassium and labile carbon were related to
the rangeland and the abandoned agriculture respectively. Generally, results of this study showed
that the land use change had significant effect on the soil properties. However, nitrogen, phosphorus
and organic carbon were less in the rangeland than the agricultural land uses, land use change led to
decrease and increase in salinity and CaCO3 respectively.

Keywords

Main Subjects

References

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Water and Soil Science
Volume 26, 1-2
June 2016
Pages 31-44

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