تأثیر جهت شیب بر تغییرپذیری مکانی ویژگی‏های فیزیکی و شیمیایی خاک در منطقه کیاسر مازندران

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشیار دانشگاه علوم کشاورزی و منابع طبیعی ساری

2 دانش آموخته کارشناسی ارشد مرتعداری دانشگاه علوم کشاورزی و منابع طبیعی ساری

چکیده

خاک یک سیستم ناهمگن، متنوع و پویا می­باشد که بررسی تغییرات زمانی و مکانی آن برای مدیریت اصولی عرصه­های طبیعی ضروری است. در تحقیق حاضر تغییرات مکانی برخی از ویژگی­های فیزیکی و شیمیایی خاک تحت تأثیر جهت دامنه در مراتع کیاسر بررسی شده است. در حوضه پشتکوه کیاسر دو سایت نمونه­برداری با شرایط یکسان اقلیمی، شیب، ارتفاع و زمین‌شناسی، فرم رویشی در دو جهت متفاوت شیب انتخاب شدند. در هر سایت نمونه­برداری یک شبکه نمونه­برداری با سلول­های 400 متر مربعی پیاده شده و تعداد  50 نمونه خاک از عمق 0- 30 سانتی­متر از هر سایت جمع­آوری و به آزمایشگاه منتقل و ویژگی­های خاک شاملpH ، میزان کربنات کلسیم معادل (CCE)، نیتروژن کل، کربن آلی، بافت خاک (درصد سیلت، رس و شن) و درصد رطوبت خاک اندازه‏گیری شدند. سپس داده­های غیرنرمال، نرمال گردیده و تجزیه تحلیل­های آماری و زمین آماری انجام شد. نتایج آزمون t نشان داد که میزان کربن آلی از نظر آماری در شیب رو به شمال تفاوت معنی­داری (01/0p<) با شیب رو به جنوب نداشت، اما بقیه ویژگی­های خاک در دو جهت متفاوت (01/0p<) بودند. در جهت رو به شمال تنها هدایت الکتریکی از خود وابستگی مکانی قوی (با نسبت اثر قطعه­ای به سقف کمتر) نشان داد و کربن آلی و درصد سیلت وابستگی مکانی ضعیف داشته (با نسبت اثر قطعه­ای به سقف بیشتر) و بقیه ویژگی­های مورد مطالعه وابستگی مکانی متوسط داشتند. در جهت رو به جنوب درصد رس و نیتروژن کل وابستگی مکانی قوی داشته، pH، هدایت الکتریکی و درصد شن وابستگی ضعیف مکانی از خود نشان دادند و بقیه ویژگی­ها دارای وابستگی متوسط مکانی بودند.

کلیدواژه‌ها

عنوان مقاله [English]

Effect of Slope Aspect on Spatial Variability of Physical and Chemical Properties of the Soil in Kiasar Region of Mazandaran Province

نویسندگان [English]

  • Z Jafarian 1
  • S Shabanzadeh 2
1 Assoc. prof., Agricultural of Science and Natural Resources University, Sari, Iran.
2 M.Sc. Graduate, Dept. of range management, Agricultural of Science and Natural Resources University, Sari, Iran.
چکیده [English]

Soil is a diverse, dynamic and heterogeneous system and investigation of its spatial and temporal changes is essential for systematic management of natural resources. In this study the spatial variabilities of some physical and chemical properties of the soil affected with aspect in Kiasar rangelands were investigated. Two sampling sites were selected with the same climatic level, slope, elevation and lithology but with different slope aspect. A sampling grid with 400 m2 cells was established in each site and 50 soil samples were collected from 0-30 cm soil depth. Soil properties including pH, caco3, total nitrogen, organic carbon, percent of silt, clay, sand and moisture were measured in the laboratory. Then data were normalized and applied for the statistical and geostatistical analyses. Results of the t test showed that organic carbon in northern slope did not have significant difference (p<0.01) with the southern slope but the other properties were different between these two slope aspects. In northern slope, EC had a high spatial dependence (with lower C0/(C0+C)), but organic carbon and percentage of silt had low spatial dependence (with higher C0/(C0+C)) and other soil properties had moderate spatial dependence. Percentages of clay and total nitrogen had high spatial dependence, while pH, EC and percentage of sand had low spatial dependence and other soil properties had moderate spatial dependence in the southern slope.

کلیدواژه‌ها [English]

  • Keywords: Aspect
  • Geostatistics
  • Kiasar
  • Soil properties
  • Spatial Variability

مراجع

Afshar H, Salehi MH, Mohammadi J, and Mehnatkesh A. 2009. Spatial Variability of Soil Properties and Irrigated Wheat Yield in a Quantitative Suitability Map, A Case Study: Shahr-e-Kian Area, Chaharmahalva-Bakhtiari Province. Journal of Water and Soil 23(1): .161-172.
Birkeland PW, 1984. Soils and Geomorphology. Oxford University Press, NY.
Cambardella CA, Moorman TB, Parkin TB, Karlen DL, Turco RF and Konopka AE, 1994. Field scale variability of soil properties       in Central Iowa soils. Soil Science Society of America Journal 58: 1501-1511.
Chaneton EJ and Avado RSL, 1996. Soil nutrients and salinity after long-term grazing exclusion in flooding Pama grassland. Journal of Range management 49: 182-187.
Covelo F, Rodríguez A And Gallardo A, 2008. Spatial pattern and scale of leaf N and P resumption efficiency and proficiency in a Quercusrobur population. Plant and Soil 311:109–119.
Dalsgard K, Bassrup E and Bunting BT, 1981. The influence of topography on the development of Alfisols on calcareous clay till in Denmark. Catena 8: 111-136.
Daniels WL, Everett CJ and Zelazny LW, 1987. Virgin hardwood forest soils of the southern Appalachian Mountains. I. soil morphology and geomorphology. Soil Science Society of America Journal. 51: 722-729.
Davatgar N, Neyshaboori M, and Moghaddam M. 2001. The analysis of information obtained from soil variables may by use of semivariogram models. Iranian J. Agric. Sci. 31(1): 724-735.
Desta F, Colbert JJ, Rentch JS and Gottschalk KW, 2004. Aspect induced differences in vegetation, soil and microclimatic characteristics of an Appalachian watershed. Journal Costanea 69: 92-108.
Goovaerts P, 1997. Geostatistics for natural resources evaluation. Oxford University Press, New York.
Hasani pak AA. 2007. Geostatistics. Tehran University Press 314p.
Hangsheng L, Wheeler D, Bell J, Wilding L, 2005. Assessment of soil spatial variability at multiple scales. Ecological Modeling 182: 271–290.
Jafari GhH. 2010. The Impact of Slope Direction of Land Surfaces On Dryness in (case study: Oghlid). 4th International Congress of the Islamic World Geographers, Zahedan, 1-8. 
Jafari Haghighi M. 2003. Sampling methods and important physical and chemical analysis methods. Nedayezoha Press, 187p.
Kamaree R. 2002. Spatial changes of production, density and plant cover percent of Nitraria schoberi L. Ms.c Thesis of Tarbiate modares University.
Kooch Y, Hosseini SM, Mohammadi J, and Hojjati SM. 2012. An Investigation in to Spatial Structure of Soil Characteristics in a Beech Forest Stand Using Geostatistical Approach. J. Sci. & Technol. Agric. & Natur. Resour., Water and Soil Sci 16, 60: 239-250.
Li HB and Reynolds JF, 1995. On definition and quantification of heterogeneity. Oikos 73: 280–284.
McGill WB, Figueiredo CT. 1993.Total nitrogen pp 201-211. In: Carter MR (Ed.), Soil Sampling and Methods of Analysis. Lewis Publishers, Boca Rton, FL.
Mohammadi J. 2001.An overview of the geostatystic principles and its application in soil science. Soil and water journal 15: 99-121.
Mohammad Zamani  S,  Ayoubi  Sh, and  Khormali F. 2007.Spatial Variability of Wheat Yield and Soil Properties in a Selected Agricultural Land of Sorkhankalateh  Journal of Water and Soil Science 11 (40): 79-91.
Nelson DW and Sommers LE, 1982. Total carbon, organic carbon, and organic matter pp 539-579. In: Page AL (Ed), Methods of Soil Analysis.Part 2.Chemical and Microbiological Properties, seconded. Agronomy Monographs. ASASSA, Madison,WI.
PazGonzales A, Vieira SR and Castro T, 2000. The effect of cultivation on the spatial variability of selected properties of an umbric horizon. Geoderma 97: 273-292.
Rogerio C, Ana LBH and Quirijn de JL, 2006. Spatio- temporal variability of soil water tension in a tropical soil in Brazil. Geoderma 133: 231-243.
Sauer TJ, Cambardella CA and Meek DW, 2006. Spatial variation of soil properties relating to vegetation changes. Plant and Soil 280:1–5.
Tavakoli M, Raiesi F, and Salehi M.H. 2008. Evaluation of selected soil quality indicators in almond orchard located on north and south-facing slopes in Saman region, Shahrekord. J. Agric. Sci. Natur. Resour 15(1): 79-93.
Tsui CC, Chen ZS and Hsieh CF, 2004. Relationships between soil properties and slope position in a lowland rain forest of southern Taiwan. Geoderma 123: 131-142.
Vieira SR and Paz Gonzalez A, 2003. Analysis of the spatial variability of crop yield and soil properties in small agricultural plots. Bragantia, Campinas 62: 127-138.
Virgilio ND, Monti A and Venturi G, 2007. Spatial variability of switchgrass (Panicum virgatum L.) yield as related to soil parameters in a small field. Field Crops Research 101: 232-239.
Wang Y, Zhang X and Huang C, 2009. Spatial variability of soil total nitrogen and soil total phosphorus under different land uses in a small watershed on the Loess Plateau, China. Geoderma 150: 141–149.
Webster R and Oliver MA, 2001. Geostatistics for Environmental Scientists. John Wiley and sons, Brisbane, Australia.
Weindorf DC and Zhu Y, 2010. Spatial variability of soil properties at Capulin volcano, New Mexico, USA: Implications for sampling strategy. Pedosphere 20(2):185-197.
Yi-chang W You-lu B Ji-yun J Fang Z Li-ping Z and Xiao-qiang L, 2009. Spatial variability of soil chemical properties in the reclaiming marine Foreland to Yellow Sea of China. Agricultural Sciences in China 8(9): 1103-1111.
Zaiden R, Dan J and Koyumdjisky H, 1982. The influence of parent material and relief on soil formation in the arid regions of eastern Samaria. In: D. H. Yalon (Editor), arid soils and geomorphic processes. Catena suppl. Cremlingen 1: 117-139.
Zhang C, Xue S, Liu G and Zhang C, 2012. Effects of slope aspect on soil chemical and microbial properties during natural recovery on abandoned cropland in the Loess Plateau, China. Advanced Materials Research 3: 56-360.
               
دانش آب و خاک
دوره 27، شماره 4
دی 1396
صفحه 225-235

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