Biology Impact of Climate Kurdistan Province on Sunflower

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1 American-Eurasian J. Agric. & Environ. Sci., 14 (10): , 014 ISSN IDOSI Publications, 014 DOI: /idosi.aejaes Biology Impact of Climate Kurdistan Province on Sunflower Navid Adibifard, Mehrdad Esfandiari, S.R. Hassanpour Avanji and M. Shojaei Poor 1 Department of Agronomy, Islamic Azad University, Karaj Branch, Karaj, Iran Young Researchers and Elite Club, Karaj Branch, Islamic Azad University, Karaj, Iran Abstract: The present study aimed to study e agroclimatic conditions of cultivation of sunflower roughout selected substations at Kurdistan Province by means of GIS system. In is study, meteorological data have been received from synoptic stations based on daily, monly and annually trend from Iran Meteorological Organization (IMO) at Kurdistan Province and en homogeneity of data has been explored by (Wald- Wolfowitz) Run Test. Meodology of e study is of statistical descriptive type. Data analysis was carried out by means of Growing Degree Day (GDD) technique and meod of Deviation from Optimum Percentage (DOP) plus phenology index as well as ermal potential wiin environment of statistical software (EXCEL and SPSS). Under agroclimatic conditions. The results of is survey may indicate at e time period among July and September is considered as active mons in terms of agriculture based on ermal potential in is region. The early days of May are e best calendar for cultivation of sunflower mon in all e aforesaid substations. Time of harvesting of sunflower crop is middle August for Divandareh, Dehgolan and Saghez substations, while is time is early September for Baneh substation. Wi respect to e phenological meod, dates of cultivation until budding, flowering and e end of flowering stage and maturation start, respectively sooner in Dehgolan substation an oer substations in is region. Key words: Agroclimate Sunflower DOP Thermal Potential Phenology Kurdistan INTRODUCTION future climate conditions, obtained from General or Regional Circulation Models (GCMs and RCMs It is now universally accepted at increased respectively), wi e simulation of CO physiological atmospheric concentrations of greenhouse gases are e effects, derived from crop experiments. Many of ese main cause of e ongoing climate change [1] and at impact studies were aimed at assessing crop development ese changes are expected to have important effects on shifts and yield variations under changes in mean climate different economic sectors (e.g. agriculture, forestry, conditions. These analyses showed at increasing energy consumptions, tourism, etc.) []. Since agricultural temperatures generally shortened e growing period of practices are climate-dependent and yields vary from year commercial crops [5-9], resulting in a shorter time for to year depending on climate variability, e agricultural biomass accumulation. On e oer hand, changes in sector is particularly exposed to changes in climate. In yields were not homogeneous and dependent on crop Europe, e present climatic trend indicates at in e phenology (e.g. summer and winter crops), crop type norern areas, climate change may primarily have (e.g. C3 and C4 plants) or environmental conditions positive effects rough increases in productivity and in (water and nutrient availability) [10, 11, 1]. Oer studies e range of species grown [3], while in souern areas stressed at changes in climate variability, as can be (i.e. e Mediterranean basin) e disadvantages will expected in a warmer climate, may have a more profound predominate wi lower harvestable yields, higher yield effect on yield an changes in mean climate [13]. variability and a reduction in suitable areas for traditional Furermore, e changes in e frequency of extreme crops [4]. For climate change impact assessment, crop climatic events during e more sensitive grow stages grow models have been widely used to evaluate crop have been recognized as a major yield-determining factor responses (development, grow and yield) by combining for some regions in e future [14]. Temperatures outside Corresponding Auor: Navid Adibifard, Department of Agronomy, Islamic Azad University, Karaj Branch, Karaj, Iran. 971

2 e range of ose typically expected during e growing coefficient at is called intercept and (b) is slope or season may have severe consequences on crops and ermal (temperature) gradient at represents temperature when occurring during key development stages ey may loss along wi height. have a dramatic impact on final production, even in case The following formulas are employed to calculate of generally favourable weaer conditions for e rest of a and b: e growing season. Many studies highlighted e potential of heat stresses during e anesis stage as a a= (y) (X ) - (x) (xy) N X ( X) (eq.1) yield reducing factor [15], while oers pointed out at e joint probability of heat stress-anesis is likely to b= N XY ( X) ( Y) N X ( X ) (eq.) increase in future scenarios [3]. Accordingly, bo changes in mean climate and climate variability To derive e results and calculation of e above (including extreme events) should be considered for a formulas, first a table is drawn for correlation among e reliable climate change impact assessment in agriculture. components for selected substations and e studied time An example is e summer heat wave of 003 [16], taken as zones formed for each of em so at ey will be an indicator of e future climate change, which reduced mentioned as monly and annual correlation elements for cereal production in Europe by 3 MT wi respect to e selected substations. 00. The reason for is reduction was attributed to e shorter growing season combined wi a higher frequency Deviation from Optimum Percentage (DOP) Technique: of extreme events, bo in terms of maximum temperatures There are 4 phenological phases in sunflower plant and it and longer dry spells [17]. has one optimum or optimal temperature per phase where The main aim of is study is to explain relation its maximum grow occurs at is optimum temperature. between e climatic parameters and of sunflower Through identifying and determination of ese optimum cultivation in Kurdistan province region. values for any phenological phase and mean daily temperature derived from detection of minimum and MATERIALS AND METHODS maximum daily values, one could characterize spatial optimums wiin various temporal intervals, particularly Data Gaering: In e current research, e parameters of mons of a year and in fact e points wi minimum e maximum and minimum daily temperatures have been deviation from optimum conditions serve as optimal used relating to statistical period (00-011) as well as location. To achieve several spatial optimums in is monly temperature during statistical career ( ) meod, first e optimums or optimal temperatures were at Kurdistan Province. determined and en by considering daily statistical mean values, derived difference from e given values about Thermal (Temperature) Gradient Meod: In order to optimum point was computed and at next step, e rate of explore into e studied region in terms of temperature and deviation from optimum conditions were acquired for e in relation wi rate of deviation from optimum conditions above-said locations and eir results were identified as at various heights or optimal time states based on height, tables. it was required adapting ermal gradient technique to determine temperature in height of some points which Thermal coefficient meod or sum of Growing Degree lacked measurement substation. Linear regression meod Day (GDD): Wi respect to importance at is attached has been utilized to derive ese temperatures. By e aid to temperature cumulative units (degree/day) in of linear regression, coefficients of temperature variance identification and topology of appropriate regions for plus eir height have been calculated for mons of a sunflower cultivation and determination of cultivation and year and total year. To compute line equation, e harvest dates for is crop based on e given resholds, following formula was used: Growing Degree Day (GDD) technique has been adapted for is purpose. The above data were processed and (y = ax + b) analyzed by means of functions in Excel software. In is investigation, e active meod (GDD) was used among In is formula, y (independent variable) is e most e common techniques for approximation of ermal important variable based on which it is predicted for e units. There are two major techniques for summation of expected value (dependent variable) x. (a) denotes a fixed temperature as follows: 97

3 Fig. 1: Study region Sum of effective and active degree day meod where which mean temperatures were higher an biological sum of active degree day technique has been employed in reshold or biological zero point. is study. All values wi quantities greater an 10 C will be calculated while e values wi less an 10 C will be Sum of Active Degree Day Technique: Phenology or excluded from is computation. know ledge of phenomena is one of e scientific topics in ecology in which plant s life cycle, which ranged from The Meod Determining Interval Wiin e Stages in time of germination to permanent hibernation, is explored. Phenological Studies: To improve efficiency and properly Wi respect to climatic variations, especially temperature use from irrigation and implementation of farming and soil moisture, dates of start and termination points for operation at any phase of growing e sunflower plant, each period may differ in several years. To temperature, all e needed planning may be executed for grow of crop diurnal temperature values (wiout subtracting base wi determination of e necessary period for bo temperatures) and during active germination days are phenological phases based on statistical daily added. temperature and indentifying interval in e given stage. For is reason, e following formula is used in order to The calculation formula is as follows: determine e necessary time interval between two phenological phases or (inside stage) based on min TMin + TMax TMin + TMax if = Tt (eq.3) temperature: where in is formula, T and T are e maximum and A max min n = (eq.4) minimum daily temperatures and T is biological T B t temperature in is equation. In meod of sum of active n denotes e needed time between two phenological degree day, which has been also used in is research, phases, (A) is ermal coefficient for its completion at e sum of daily temperature degrees was used wi positive given step, (B) as biological reshold of crops and (T) is values, but ey have been used only for ose days in daily temperature. 973

4 RESULTS Results of Phenology: Application of ermal coefficients in farming issues and codification of a farming calendar in Analysis of Deviation from Optimum Percentage (DOP): various regions is crucially important. Despite of e Sunflower plant includes four phenological phases, which absence of phenological primary studies in is field at are important from agroclimatic point of view and large scale and wi benefitting from e agroclimatic reviewed in is investigation. These stages in sunflower studies conducted by quanta engineers and rough are as follows: Cultivation till budding, flowering, end of cooperation wi Romanian advisors and employing eir flowering and total maturation. Any phase includes an used techniques, active degree days and determination of optimum or best temperature in which e plant may grow e intervals wiin phenological stages are explored at max level in is optimal temperature. In order to based on various resholds. conduct phenological study on sunflower and wi respect to e executed investigation, e mid- matured Temporal Optimum Based on Meod of Active Degree varieties of is crop wi e most frequency were Days: Active temperature degrees are one of e oer considered as base crop. Table (3) shows e rate of agroclimatic meods for determination of optimum times deviation from optimum conditions at any phenological based on e date of latest min reshold events at any stage based on mean daily temperature roughout e phenological stage (sunflower) at has been used in is selected substations. Wi respect to derived results from investigation. Sum of daily temperatures was used wi e following table for sunflower plant at flowering stage, positive values but only for ose days wi temperatures, compared to oer substations, Dehgolan station has e which are higher an average biological level or zero min deviation wi higher optimal conditions. Then degree of activity. In is study, e basis point for Dehgolan, Divandareh, substations have less deviation calculation of active ermal coefficients is determined from is condition. As a result, compared to oer based on two modes: One is based on e min resholds substations, Dehgolan station has less deviation from of e plant (sunflower) at each of phenological stages optimum status and is means at e aforesaid and e latter is zero point (0 C). Given ese plant species station possesses optimal conditions for cultivation of extremely depend on temperature so statistical daily sunflower. temperature has been used as min and max detection data for phenology of plant species (sunflower). Date of The Rate of Deviation from Optimum Conditions Based completion for each of phenological stages has been on Height determined wi identifying accurately each of resholds Thermal (Temperature) Gradient: In order to review in plant s phenological phases (sunflower) and daily on rate of deviation from optimum conditions at temperatures. Date of e min biological reshold event various heights or spatial optimum conditions based was considered more an 10C to activate e plant on height, initially coefficients of variance for daily (sunflower) in each of substations. It requires using 100, temperatures in respect of height have been 500, 1000 and 1800 ermal units (Btu) higher an zero calculated for mons of a year and total year by degree (0 C) to achieve date of completion of means of linear regression technique. To derive e given phenological cultivation stage (sunflower) respectively in results and computation of above formulas, firstly each of cultivation stage until budding, flowering phase, correlation elements table was made for e selected at e end of flowering step and e maturation stage. substations and in all studied time intervals and a Wi respect to Table 3, date of cultivation until budding, summary of its results has been illustrated as annual flowering, end of flowering and maturation of sunflower correlation elements for e selected substations in crop start sooner respectively in Dehgolan and Table. Divandareh substations an oer stations. Given e Benefitted from regression formula, we calculated related Table (3), date of cultivation until budding, ermal gradient table, which denotes status of variable of flowering, end of flowering and maturation of sunflower daily temperature in several heights and mos of a year plant begin earlier correspondingly in Dehgolan and in Excel software environment and by means of e given Divandareh substations an oer stations. linear regression regarding e relationship among rate deviation from optimum conditions at any phenological The Appropriate Regions for Types of Cultivation phase and all of its stages and drew its diagram. Due to (Sunflower): Based on agro climatic analysis, e best high R, zoning operation became possible in GIS cultivation calendar (of sunflower) are respectively environment. soueast and nor and western areas at is province. 974

5 Table 1: Determining deviation from optimum conditions at phenological phases in sunflower in selected substations Cultivation to budding Flowering End of flowering Total matured Grow phases Deviated from Deviated from Deviated from Deviated from Substation Optimum conditions Optimum conditions Optimum conditions Optimum conditions Sum of deviations Divandareh Saghez Baneh Dehgolan Table : Annual correlation elements of Kurdistan province selected substations during phenological phases (Thermal gradient) for sunflower Period Coefficients Cultivation to budding phase Flowering End of flowering Maturation B A R , Table 3: Date of completion of phenological stages in sunflower plant Substation Height Date of minimum reshold event Cultivation until budding Flowering End of flowering Total maturation Saghez 1485 st 15 May 8 May 18 June 17 July h 7 August Divandareh 1365 st 1 May 6 May 17 June 13 July 0 August Dehgolan 75 9 April 15 May nd 5 June rd 4 July 11 August Baneh 1806 st 1 May 30 May 8 June July August Fig. : Total deviation from e optimal conditions for sunflower 975

6 CONCLUSION G. Leckebusch, M. Moriondo, M. Radziejewski, J. Santos, P. Schlyter, M. Schwarb, I. Stjernquist and Whereas one of e important problems in modern U. Ulbrich, 007. Modelling e impact of climate world is production of more foods and nutrients wi extremes: an overview of e MICE Project. Clim higher quality and since producing agricultural crops and Change, 81: capabilities of any region depend on its weaer and 3. Alcamo, J., J.M. Moreno, B. Nováky, M. Bindi, climatic and ambient specifications us it is crucially R. Corobov, R.J.N. Devoy, C. Giannakopoulos, E. important to study on e effective meteorological and Martin, J.E. Olesen and A. Shvidenko, 007. Europe. environmental on agriculture. Today, It is deemed as a Climate Change 007: Impacts, Adaptation and secured and undeniable platform for accurate Vulnerability. In: Parry ML, Canziani OF, Palutikof JP, development of agriculture. In terms of agroclimatic van der Linden PJ, Hanson CE (eds) Contribution of aspect, sunflower is considered as one of active monly Working Group II to e Four Assessment Report agricultural crops based on ermal potential meod from of e Intergovernmental Panel on Climate Change. June to mid October in is region. According to Cambridge University Press, Cambridge, pp: agroclimatic analyses, e best cultivation calendar 4. Olesen, J.E. and M. Bindi, 00. Consequences of belongs to e optimal cultivation calendar for sunflower climate change for European agricultural plant in all substations at e early of may. Sunflower is productivity, land use and policy. Eur. J. Agron., harvested in Divandareh, Saghez and Dehgolan in end 16: 39-6 August while it is harvested in Baneh substation at mid 5. Peiris, D.R., J.W. Crawford, C. Grashoff, September. Wi respect to phenological meod, dates of R.A. Jefferies, J.R. Porter and B. Marshall, cultivation up to budding phase, flowering stage, end of A simulation study of crop grow and flowering and maturation of sunflower plant start sooner development under climate change. Agric For respectively in Divandareh and Dehgolan an in oer Meteorol., 79: substations. In Divandareh substation, sunflower has e 6. Harrison, P.A. and R.E. Butterfield, Effect of less deviation and more optimum conditions an oer climate change on Europe-wide winter wheat and substations at total maturation stage. After Divandareh, sunflower productivity. Clim Res., 7: Saghez and Baneh stages have less deviation while 7. Singh, B., M. El Maayar, P. André, C.R. Bryant and compared to oer stations, Dehgolan substation has J.P. Thouez, Impacts of a GHG-induced climate more deviation; as a result, in comparison wi oer change on crop yields: effects of acceleration in substations, Dehgolan substation has less deviation from maturation, moisture stress and optimal temperature. optimum conditions; namely, is substation possesses Clim Change, 38: optimal conditions for cultivation of sunflower. 8. Guereña, A., M. Ruiz-Ramos, C.H. Díaz-Ambrona, REFERENCES J. Conde and M.I. Mínguez, 001. Assessment of climate change and agriculture in Spain using climate models. Agron. J., 93: Forster, P., V. Ramaswamy, P. Artaxo, T. Berntsen, 9. Giannakopoulos, C., P. Le Sager, M. Bindi, M. R. Betts, D.W. Fahey, J. Haywood, J. Lean, Moriondo, E. Kostopoulou and C.M. Goodess, 009. D.C. Lowe, G. Myhre, J. Nganga, R. Prinn, G. Raga, Climatic changes and associated impacts in e M. Schulz and R. Van Dorland, 007. Changes in Mediterranean resulting from global warming. Global Atmospheric Constituents and in Radiative Forcing. Planet Change, 68: 09-. In: Solomon S, Qin D, Manning M, Chen Z, Marquis 10. Ainswor, E.A. and S.P. Long, 005. What have we M, Averyt KB, Tignor M, Miller HL (eds) Climate learned from 15 years of free-air CO enrichment Change 007: The Physical Science Basis. (FACE)? A meta-analytic review of e responses of Contribution of Working Group I to e Four photosynesis, canopy properties and plant Assessment Report of e Intergovernmental Panel production to rising CO. New Phytol., 165: on Climate Change. Cambridge University Press, 11. Thomson, A.M., R.A. Brown, N.J. Rosenberg, Cambridge. R.C. Izaurralde and V. Benson, 005. Climate change. Hanson, C.E., J.P. Palutikof, M.T.J. Livermore, impacts for e conterminous USA: an integrated L. Barring, M. Bindi, J. Corte-Real, R. Durao, assessment-part 3 dryland production of grain and C. Giannakopoulos, P. Good, T. Holt, Z. Kundzewicz, forage crops. Clim Change, 69:

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