Effect of Land Use Change from Rangeland to Agricultural Land on Soil Fertility in Taftan Region
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.
Language:
Persian
Published:
Journal of Water and Soil Science, Volume:26 Issue: 2, 2016
Pages:
31 to 44
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