Document Type : Research Paper
Authors
1 Soil Science Department, Faculty of Agriculture , Ferdowsi University of MAshhad
2 Ferdowsi University of Mashhad
3 Soil Science Department- Faculty of Agriculture- Ferdowsi University of MAshhad
Abstract
Extended abstract
Introduction
Knowledge about the soil quality in agriculatral lands and natural resources is essential for achievement the best management and maximum economic efficiency. The land use change is the important human activity in environmental ecosystems, which effect on some soil processes such as microbial activity, mineralization of carbon and nitrogen content. In addition, land use has an important role on temporal and spatial variation of soil properties and quality. Agricultural practices may affect positive or negative effect on soil quality. Intensive cultivation of plants decreases soil physical and quality, as a result of this yield of plants, production efficiency and environment quality decrease. In this research, the effect of three land uses on soil physical, fertility and quality properties were studied.
Materials and methods
The studied area (Hossein abad) is located 30 km far from the northern Nehbandan town (South Khorasan, Iran).To study the effect of land uses change on soil properties were selected three land uses including pomegranate (Punica granatum ), olive (Olea europaea) and wheat (Triticum aestivum ). The 45 soil samples (15 samples from each land use) were taken from surface soil (0-30 cm). Then some soil physical and fertility properties which affect the soil quality were measured and the effect of land use change from wheat cultivation to olive and pomegranate gardens during the recent 20 years were studied. In addition, soil quality in each land use was determined based on cornel university test. To compare soil properties and quality, the randomized complete block design was applied.
Results and discussion
The results showed that land use change had a significant effect on organic carbon, mean weight diameter of aggregates (MWD), water stable aggregates (WSA), macro nutrients (N, P, and K), and some micro nutrients (Fe and Mn) (P < 0.001). Comparison of means demonstrated that the difference between organic carbon content in olive and pomegranate land uses was not significant, and the content of OC in both land uses was significantly higher than wheat land use. Olive and pomegranate land uses cause to stability of soil structure increase, probably due to reduction the traffic of wheals and also somewhat increasing the organic carbon as a result of littering. Therefore, the MWD in olive land use was significantly higher than two land uses and the lowest value was obtained in what land use. Also, the value of WSA in three land uses was significantly different (P < 0.05) and their content in olive and wheat land uses were the maximum and minimum, respectively. The concentration of total nitrogen in pomegranate land use was more significant than two other land uses (P < 0.05). But the concentration of phosphorous (P), potassium (K), Fe and Mn in wheat land use was the highest content and significantly greater than other two land uses. Despite the concentrations of P, K, and Fe nutrients in pomegranate land use were the lowest value, but, there were no significant difference between the concentration of them in olive and pomegranate land uses. It seems that this variation especially P and Fe is probably due to pH and the Ca and Mg concentration and creation insoluble component of Fe, Mn and P in these land uses.
According to the results of cornel university test, soil quality in garden land uses was decreased and the range of soil quality score was varied from 49.5 (olive) to 61.2 (wheat). Among the soil properties affecting the soil quality, fertility and chemical properties such as electrical conductivity (EC), absorption sodium ratio (SAR) and somewhat pH of soil saturated extract decreased the soil quality in olive land use. Also, OM, Fe, Zn, and Mn decreased the soil quality in 3 land uses, of course in olive and pomegranate land uses, micro nutrients (Fe and Mn) had the more effect on decreasing the soil quality compared to wheat land use. In addition, bulk density (Bd), mean weight diameter of aggregates (MWD), aeration porosity (AC), P, K, and Cu contents increased soil quality in all 3 land uses.
Conclusion
In general, when wheat land use change to olive and pomegranate land uses decreased some soil properties and quality in arid area of Nehbandan, probably due to low quality of irrigation water.
Keywords
Main Subjects
- Abid, M., and Lal, R. 2008: Tillage and drainage impact on soil quality - I. Aggregate stability, carbon and nitrogen pools. Soil and Tillage Research, 100: 89-98.
- Alikhani, H.A., and Saveghebi, GH.R. 2006. Evaluation the efficiency of epi-genic earthworms some part of northern Iran in Vermi-compost technology. Soil Environment and Sustainable Development Conference, 8-9 Nov. Karaj-Iran (in Persian).
- Barzagar, A.R. 2002. Fundamentals of soil physics. Shahid Chamran University of Ahvaz Press, 252p. (in Persian).
- Arshad, M.A., and Coen, G.M. 1992. Characterization of soil quality: physical and chemical criteria. American Journal of Alternative Agriculture, 7: 25–31.
- Blake, G.R., and Hartge, K. H. 1986. Bulk Density. In: Klute, A. (Ed.), Methods of soil analysis, part I, ASA Monograph No. 9.Madison, WI, pp, 363–376.
- Bremner, J.M., and Mulvaney C.S. 1982. Nitrogen total. In: Page, A.L., et al. (Ed.), Methods of soil analysis. part 2. Chemical and Microbiological Properties. ASA, Madison, WI, pp, 595–624.
- Celik, I. 2005. Land use effects on organic matter and physical properties of soil in a southern Mediterranean highland of Turkey. Soil and Tillage research. 83: 270- 277.
- Chorom, M., and Rengasamy, P. 1997. Carbonate chemistry, pH, and physical properties of an alkaline sodic soil as affected by various amendments. Australian Journal of Soil Research, 35: 149-161.
- Drever, J.I. and Stillings, L.L. 1997. The role of organic acids in mineral weathering. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 120: 167-181.
- Emami, H., Astaraei, A.R., and Fotovat, A. 2014. Evaluating the effect of organic matter on soil quality score functions. Journal of Water and Soil, 28(3): 565-574 (in Persian with English abstract).
- Fox, T.R. 1995. The influence of low-molecular-weight organic acids on properties and processes in forest soils. PP. 43-46. In: McFee, W.W. and J.M. Kelly (Eds.), Carbon forms and functions in forest soils, Soil Science. America, Madison, WI.
- Gugino, B. K., Abawi, G. S., Idowu, O. J., Schindelbeck, R. R., Smith, L. L., Thies, J. E., and Van Es, H. M. 2009. Cornell soil health assessment training manual. Cornell University College of Agriculture and Life Sciences.
- Hajabbasi, M. A., Jalalian A., and Karimzadeh K.H. A. 1997. Deforestation effects on soil physical and chemical properties, Lordegan, Iran. Plant and Soil, 190: 301-308.
- Jones, N., de Graaff, J., Duarte, F., Rodrigo, I., and Poortinga, A. 2014. Farming systems in two less favoured areas in Portugal: their development from 1989 to 2000 and the implication for sustainable land management. Land Degradation and Development, 25: 29-44.
- Kemper, W.D., and Rosenau, R.C. 1986. Aggregate stability and size distribution. In: Klute A. (ed), Methods of soil analysis. Part1. Agronomy monographs, 9. America Society of Agronomy, Madison, WI.
- Lal, R., Mokma, D. and Lowery, B. 1999. Relation between soil quality and erosion, pp. 237–258, In: R. Lal, (ed.), Soil quality and soil erosion. Soil and Water Conservation Society, Ankeny, IO.
- Lindsay, W. L., and Norvell, W. A. 1978. Development of a DTPA soil test for zinc, iron, manganese, and copper. Soil Science Society of America Journal, 42: 421-428.
- Loveland, P., and Webb, J. 2003. Is there a critical level of organic matter in theagricultural soils of temperate regions: A review. Soil and Tillage Research, 70:1-18.
- Olsen, S.R., Cole, C.V., Watanable F.S., and Dean L.A. 1954. Estimation of available phosphorus in soils by extraction with sodium bicarbonate. USDA Circular 939, Washington.
- Page, A.L., Miller, R.H., and Keeney, D.R. 1982. Methods of Soil Analysis, part2, chemical and microbiological properties. American society of agronomy,Inc. soil Science Society of America, Madison, WI.
- Pieri, C.J.M.G. 1992. Fertility of Soils: A Future for Farming in the West African Savannah. Springer-Verlag, Berlin, Germany.
- Pohlman, A.A. and McColl, J.G. 1988. Soluble organics form forest litter and their role in metal dissolution. Soil Science Society of America Journal, 52: 265-271.
- Richards, L. A. 1954. Diagnosis and improvement of saline and alkali soils. Soil Science, 78- 154.
- Walkley, A., and Black, I. A. 1934. An examination of the Degtjareff method for determining soil organic matter, and a proposed modification of the chromic acid titration method. Soil science, 37: 29-38.
- Wallace, A., and Terry, R.E. 1998. Soil conditioners, soil quality and soil sustainability. In: Wallace, A., Terry, R.E. (Eds.), Handbook of Soil Conditioners. Marcel Dekker, New York, NY, pp. 1 – 41.
- Ye, L., Tang, H., Zhu, J., Verdoodt, A., and Van Ranst. E. 2008. Spatial patterns and effectsof soil organic carbon on grain productivity assessment in China. Soil Use and Management, 24: 80-91.
- Zhao, G., Mu, X., Wen, Z., Wang, F., and Gao, P. 2013. Soil erosion, conservation, and Environment changes in the Loess Plateau of China. Land Degradation and Development, 24: 499-501.