Document Type : Research Article

Authors

1 M.Sc. Student Department of Soil Science, Faculty of Agriculture, Shiraz University, Shiraz, Iran, respectively.

2 Associate Professor, Department of Soil Science, Faculty of Agriculture, Shiraz University, Shiraz, Iran, respectively.

Abstract

Introduction: Zinc (Zn) is an important nutrient element for plants growth, which plays an important role in the metabolism of plant. Zn uptake by plants requires release of Zn adsorbed onto the soil constituents and even Zn containing minerals. The release of Zn from soil surface to the soil solution is an important factor that controls availability of Zn for growing plants. Kinetics of Zn release from soil could indicate ability of soil to Zn supply to plants. The purpose of present study was to investigate the effects of soil depth and canopy of three cultivars of palm including Shahani, Ghasab and Halavani on release kinetics of native Zn by AB-DTPA extractant.
Materials and Methods: In order to investigate the effects of depth and vegetation on the pattern of Zn release,  54 soil samples were collected from inside and outside canopy of different palm cultivars ­ (Shahani, Halavani and Ghasab), three depths (0-20, 20-40 and 40-60 cm) with three replications. These samples were collected from village of Simakan, located in the city of Jahrom. Extraction was performed after eight shaking times (5, 15, 30, 60, 120, 240, 480, and 1440 min) with ammonium bicarbonate-diethylene triamine penta acetic acid (AB-DTPA). After each shaking time, samples were immediately centrifuged for 15 min, and then filtered through filter paper. The concentration of Zn in solutions were determined using an atomic absorption spectrophotometer (AA-67OG). Seven commonly used kinetics models in nutrient release studies were used to describe Zn release including zero-order, first-order, pseudo-first-order, pseudo-second-order, power function, parabolic diffusion, and simple elovich. Data analysis and drawing of charts were done by SAS software and Excel program, respectively. Relatively high value of coefficient of determination and low value of standard error of estimate were considered as criteria for the best fit.
Results and Discussion: The results of this study showed that the simplified Elovich, parabolic diffusion and power function equations well described the pattern of Zn release from soil as evidenced by higher coefficient of determination and lower values of the standard error of the estimate. The Zn release pattern in all soil samples consisted of a quick stage from the start of the experiment to 240 minutes and a slower stage at subsequent times. The correlation between the coefficients of the kinetic equations of the power function, simplified Elovich and parabolic diffusion showed that there was higher correlations between the coefficients of the equations obtained from the under canopy in comparison with those of out of canopy. Although soil is a major factor influencing vegetation growth and characteristics, plants could, in turn, also affect different soil properties. In addition, the palm root system and the rhizosphere exhibit a complex diversity, which could regulate the plant homeostasis. The interaction of root-microorganism in the rhizosphere can cause many of the physical, chemical and biological properties of the rhizosphere soil that are different from the bulk soil. Important changes in the soil properties of the rhizosphere environment include soil pH, soil oxidation-reduction reactions, soil moisture, and nutrient availability for microorganisms and plant. Root exudates also contribute to enhance of the availability of elements by reducing the pH of the rhizosphere and creating bioavailable Zn complex. Recent studies have shown that root exudates can act as an influential factor in extracting significant values of plant nutrients from calcareous soils. Our results showed that the amount of accumulated Zn released from the under canopy soils was more than the out of canopy soils, and the highest amount of accumulated Zn was released in the soils under canopy of Ghasab cultivar.
Conclusion: Results of present study showed that the values of Zn released from the under canopy soils was higher than interspaces soils, and the highest amount of accumulated Zn was released in the soils under canopy of Ghasab cultivar. Such observations clearly indicate that palm trees are able to supply Zn absorption capacity under their own canopy soils. Therefore, it appears that higher rates of Zn release from the under canopy soils in comparison with interspaces could be attributed to higher root exudates which impact soil properties, microorganism activities and lower pH which, in turn, increase the amounts of metals including of Zn release and bioavailability. Further researches on the effect of palm root system on physical and chemical properties of soil, including organic matter, soil pH, which could cause great impacts on the amount of Zn release are highly recommended.

Keywords

1- Al-Farsi M.A., and Lee C.Y. 2008. Nutritional and functional properties of dates: a review. Critical reviews in food Science and Nutrition 48(10): 877-887.
2- Broomand N., Savaghebi-firoozabadi Gh, and Farahbakhsh M. 2010. Kinetics of zinc desorption and relations of kinetics parameters with properties of some soils of Iran. Journal Water and Soil 19(2): 99-112. (In Persian)
3- Bruemmer G.W., Gerth J., and Tiller K.G. 1988. Reaction kinetics of the adsorption and desorption of nickel, zinc and cadmium by goethite. I. Adsorption and diffusion of metals. Journal of Soil Science 39(1): 37-52.
4- Bouamri R., Dalpe Y., Serrhini M.N., and Bennani A. 2006. Arbuscular mycorrhizal fungi species associated with rhizosphere of Phoenix dactylifera L. in Morocco. African Journal of Biotechnology 5(6): 510-516.
5- Bouyoucos G.J. 1951. A recalibration of the hydrometer method for making mechanical analysis of soils 1. Agronomy Journal 43(9): 434-438.
6- Dadvar M., and Forohar M. 2007. Rhizosphere, a solution for soil management around roots. Journal Land Management 3(1).
7- Dang Y.P., Dalal R.C., Edwards D.G., and Tiller K.G. 1994. Kinetics of zinc desorption from Vertisols. Soil Science Society of America Journal 58(5): 1392-1399.
8- Dalal R.C. 1985. Comparative prediction of yield response and phosphorus uptake from soil using anion-and cation-anion-exchange resins. Soil Science 139(3): 227-231.
9- Dowson V. H. W. 1982. Date production and protection (Plant production and protection Paper No. 35). FAO Food and Agriculture Organization of the United Nations, Rome, Italy.
10- Dessureault-Rompre J., Nowack B., Schulin R., Tercier-Waeber M.L., and Luster J. 2008. Metal solubility and speciation in the rhizosphere of Lupinus albus cluster roots. Environmental Science & Technology 42(19): 7146-7151.
11- Escudero A., Iriondo J.M., Olano J.M., Rubio A., and Somolinos R.C. 2000. Factors affecting establishment of a gypsophyte: the case of Lepidium subulatum (Brassicaceae). American Journal of Botany 87(6): 861-871.
12- Ghasemi-Fasaei R., Tavajjoh M., Olama V., Molazem B., Maftoun M., Ronaghi A., and Adhami E. 2007. Copper release characteristics in selected soils from southern and northern Iran. Soil Research 45(6): 459-464.
13- Hoffland E., Wei C., and Wissuwa M. 2006. Organic anion exudation by lowland rice (Oryza sativa L.) at zinc and phosphorus deficiency. Plant & Soil 283(1-2): 155-162.
14- Jahantigh M. 2017. Investigating the relationship between soil and vegetation on the beach of rivers in arid regions. Journal Plant Ecosystem Conservation (In Persian)
15- Jones D.L. 1998. Organic acids in the rhizosphere–a critical review. Plant and Soil 205(1): 25-44.
16- Karimian N., and Moafpouryan G.R. 1999. Zinc adsorption characteristics of selected calcareous soils of Iran and their relationship with soil properties. Communications Soil Science Plant Analysis 30: 1721-1731.
17- Kuo S., and Mikkelsen D.S. 1980. Kinetics of zinc desorption from soils. Plant & Soil 56(3): 355-364.
18- Lindsay W.L., and Norvell W.A. 1978. Development of a DTPA soil test for zinc, iron, manganese, and copper 1. Soil Science Society of America Journal 42(3): 421-428.
19- McNear D.H. 2013. The rhizosphere-roots, soil and everything in between. Nature Education Knowledge, 4(3): 1.
20- Mehdizade M., Reyhanitabar A., and Ostan Sh. 2016. The effect of soil organic matter on kinetics and thermody namices of phosphorus adsorption. Journal Water and Soil Science (In Persian)
21- Motaghian H.R., and Hossein Pour A.R. 2015. Effect of rhizosphere on zinc release rate in some calcareous soils of Chaharmahal and Bakhtiari provice. Journal Technology of Greenhouse Culture-Isfahan Uni. (In Persian)
22- Naganuma K., Okazaki M., Yonebayashi K., Kyuma K., Vijarnsorn P., and Bakar Z.A. 1993. Surface charge and adsorption characteristics of copper and zinc on tropical peat soils. Soil Science & Plant Nutrition 39(3): 455-462.
23- Nezami S., and Malakoti M.J. 2016. The role of organic acids in release of phosphorus and zinc from a calcareous soil. Journal of Water and Soil 30(3): 805-816.
24- Nelson D.W., and Sommers L.E. 1996. Total carbon, organic carbon, and organic matter. Methods of Soil Analysis part 3—Chemical Methods, (methodsofsoilan3), 961-1010.
25- Nishanth D., and Biswas D.R. 2008. Kinetics of phosphorus and potassium release from rock phosphate and waste mica enriched compost and their effect on yield and nutrient uptake by wheat (Triticum aestivum). Bioresource Technology 99(9): 3342-3353.
26- Padidar M. 2015. Effect of Soil Propretics on Kinetic Zinc Release. Fisheries and Hydrobiology 1816-91120.
27- Pavlatou A., and Polyzopoulos N.A. 1988. The role of diffusion in the kinetics of phosphate desorption: the relevance of the Elovich equation. Journal of Soil Science 39(3): 425-436.
28- Rattan R.K., and Sharma P.D. 2004. Main micronutrients available and their method of use. In Proceedings IFA International Symposium on Micronutrients (pp. 1-10).
29- Reyhanitabar A., Karimian N., Adalan M., Savaghebi G.R., and Ghanadha M.R. 2007.Distribution of different zinc forms and their relationship with soil characteristics in some calcareous soil of Tehran province. Journal Agricultur Science & Technology. (In Persian)
30- Reyhanitabar A., and Gilkes R.J. 2010. Kinetics of DTPA extraction of zinc from calcareous soils. Geoderma, 154(3-4): 289-293.
31- Rhoades J.D. 1996. Salinity: Electrical conductivity and total dissolved solids. Methods of Soil Analysis Part 3—Chemical Methods, (methodsofsoilan3), 417-435.
32- Soltanpour P.A., and Schwab A.P. 1977. A new soil test for simultaneous extraction of macro‐and micro‐nutrients in alkaline soils. Communications in Soil Science and Plant Analysis 8(3): 195-207.
33- Sparks D.L. 1986. Kinetics of reaction in pure and mixed systems. Soil Physical Chemistry 44: 265-268.
34- Sparks LD. 1999. Soil Physical Chemisrty. 2nd. Ed., CRC Press. Boca Raton, FL.
35- Steffens D., and Sparks D.L. 1997. Kinetics of nonexchangeable ammonium release from soils. Soil Science Society of America Journal 61(2): 455-462.
36- Sposito G., Lund L.J., and Chang A. 1982. Trace metal chemistry in arid-zone field soils amended with sewage sludge. I. Fractionation of Ni, Cu, Zn, Cd, and Pb in solid phases. Soil Science Society of America Journal 46: 260-264.
37- Sumner M.E., and Miller W.P. 1996. Cation exchange capacity and exchange coefficients. Methods of Soil Analysis part 3—Chemical Methods, (methodsofsoilan3), 1201-1229.
38- Tahmasebi F., Hossein Pour A. 2007. Kinetics of extractable phosphorus changes in a number of Hamadan soils. Journal of Sciences and Technology of Agriculture and natural Resources 11(42): 475-488.
39- Thomas G.W. 1996. Soil pH and soil acidity. Methods of soil analysis part 3—chemical methods, (methodsofsoilan3), 475-490.
40- Toranjzar H.M., Jafri H., Azarneyvad M., and Ghanadha R. 2006. Investigation of relationship between soil characteristics and vegetation cover of rangeland and mountains of Qom provice. 10(2): 349-360.
41- Wang Z., Shan X.Q., and Zhang S. 2002. Comparison between fractionation and bioavailability of trace elements in rhizosphere and bulk soils. Chemosphere 46(8): 1163-1171.
42- Young S.D., Zhang H., Tye A.M., Maxted A., Thums C., and Thornton I. 2005. Characterizing the availability of metals in contaminated soils. I. The solid phase: sequential extraction and isotopic dilution. Soil Use and Management, 21: 450-458.
43- Zaid A. (Ed.). 1999. Date palm cultivation. Rome: United Nations FAO Plant Production and Protection Paper.
44- Zhu B., and Alva A.K. 1993. The chemical forms of Zn and Cu extractable by Mehlich 1, Mehlich 3, and ammonium bicarbonate-DTPA extractions. Soil Science 156(4): 251-258.
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