Zinc deficiency as a critical problem in wheat production in Central Anatolia
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In a soil and plant survey, and in field and greenhouse experiments the nutritional status of wheat plants was evaluated for Zn, Fe, Mn and Cu in Central Anatolia, a semi-arid region and the major wheat growing area of Turkey.
All 76 soils sampled in Central Anatolia were highly alkaline with an average pH of 7. 9. More than 90% of soils contained less than 0.5 mg kg-1 DTPA-extractable Zn, which is widely considered to be the critical deficiency concentration of Zn for plants grown on calcareous soils. About 25% of soils contained less than 2.5 mg kg-1 DTPA-extractable Fe which is considered to be the critical deficiency concentration of Fe for plants. The concentrations of DTPA-extractable Mn and Cu were in the sufficiency range. Also the Zn concentrations in leaves were very low. More than 80% of the 136 leaf samples contained less than 10 mg Zn kg−1. By contrast, concentrations of Fe, Mn and Cu in leaves were in the sufficient range.
In the field experiments at six locations, application of 23 kg Zn ha-1 increased grain yield in all locations. Relative increases in grain yield resulting from Zn application ranged between 5% to 554% with a mean of 43%. Significant increases in grain yield (more than 31%) as a result of Zn application were found for the locations where soils contained less than 0.15 mg kg-1 DTPA-extractable Zn.
In pot experirnents with two bread (Triticum aestivum, cvs. Gerek-79 and Kirac-66) and two durum wheats (Triticum durum, cvs. Kiziltan-91 and Kunduru-1149), an application of 10 mg Zn kg-1 soil enhanced shoot dry matter production by about 3.5-fold in soils containing 0.11 mg kg-1 and 0.15 mg kg-1 DTPA-extractable Zn. Results from both field observations and greenhouse experiments showed that durum wheats were more susceptible to Zn deficiency than the bread wheats. On Zn deficient soils, durum wheats as compared to bread wheats developed deficiency symptoms in shoots earlier and to a greater extent, and had lower Zn concentration in shoot tissue and lower Zn content per shoot than the bread wheats.
The results presented in this paper demonstrate that (i) Zn deficiency is a critical nutritional problem in Central Anatolia substantially limiting wheat production, (ii) durum wheats possess higher sensitivity to Zn deficient conditions than bread wheats, and (iii) wheat plants grown in calcareous soils containing less than 0.2 mg kg-1 DTPA-extractable Zn significantly respond to soil Zn applications. The results also indicate that low levels of Zn in soils and plant materials (i.e. grains) could be a major contributing factor for widespread occurrence of Zn deficiency in children in Turkey, whose diets are dominated by cereal-based foods.
Key wordsbread wheat calcareous soil Central Anatolia durum wheat genetic differences zinc deficiency
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- Anonymous 1993 CIMMYT World Wheat Facts and Trends 1992/1993. The Wheat Breeding Industry in Developing Countries: An Analysis of Investments and Impacts. CIMMYT, Singapore, 35 p.Google Scholar
- Bansal R L, Singh S P and Nayyar V K 1990 The critical zinc deficiency level and response to zinc application of wheat on typic ustochrepts. Exp. Agric. 26, 303–306.Google Scholar
- Black C A 1965 Methods of Soil Analysis. Agronomy No. 9, Part 2. American Society of Agronomy, Madison, WI, USA.Google Scholar
- Cakmak I, Gülüt K Y, Marschner H and Graham R D 1994 Effect of zinc and iron deficiency on phytosiderophore release in wheat genotypes differing in zinc efficiency. J. Plant Nutr. 17, 1–17.Google Scholar
- Cakmak I, Sari N, Marschner H, Kalayci M, Yilmaz A, Eker S and Gülüt K Y 1996a Dry matter production and distribution of zinc in bread and durum wheat genotypes differing in zinc efficiency. Plant and Soil 180, 173–181.Google Scholar
- Cakmak I, Sari N, Marschner H Ekiz H, Kalayci M, Yilmaz A and Braun H J 1996b Phytosiderophore release in bread and durum wheat genotypes differing in zinc efficiency. Plant and Soil 180, 183–189.Google Scholar
- Cartwright B, Tiller K G, Zarcinas B A and Spouncer L R 1983 The chemical assessment of the boron status of soils. Aust. J. Soil Res. 21, 321–332.Google Scholar
- Cavdar A O, Arcasoy A, Cin S, Babacan E and Gözdasoglu S 1983 Geophagia in Turkey: Iron and zinc deficiency, iron and zinc absorption studies and response to treatment with zinc in geophagia cases. In Zinc Deficiency in Human Subjects. pp 71–79. Alan R Liss, Inc., New York, USA.Google Scholar
- Dang Y P, Edwards D G, Dalal R C and Tiller K G 1993 Identification of an index tissue to predict zinc status of wheat. Plant and Soil 154, 161–167.Google Scholar
- Graham R D, Ascher J S and Hynes S C 1992 Selecting zinc-efficient cereal genotypes for soils of low zinc status. Plant and Soil 146, 241–250.Google Scholar
- Graham R D and Rengel Z 1993 Genotypic variation in zinc uptake and utilization by plants. In Zinc in Soils and Plants. Ed. A D Robson. pp 107–118. Kluwer Academic Publishers, Dordrecht, the Netherlands.Google Scholar
- Graham R D and Welch R M 1994 Breeding for staple-food crops with high micronutrient density: Long-term sustainable agricultural solutions to hidden hunger in developing countries. In IFPRI Workshop on Food Policy and Agricultural Technology to Improve Diet Quality and Nutrition Annapolis, Maryland, January 10–12 (In press).Google Scholar
- Lindsay W L and Norvell W A 1978 Development of a DTPA soil test for zinc, iron, manganese and copper. Soil Sci. Soc. Am. J. 42, 421–428Google Scholar
- Marschner H 1993 Zinc uptake from soils. In Zinc in Soils and Plants. Ed. A D Robson. pp 59–77. Kluwer Academic Publishers, Dordrecht, the Netherlands.Google Scholar
- Melton J R, Mahtab S K and Swoboda A R 1973 Diffusion of zinc in soils as a function of applied zinc, phosphorus and soil pH. Soil Sci. Soc. Am. Proc. 37, 379–381.Google Scholar
- Prasad A S 1982 History of zinc in human nutrition. In Clinical Applications of Recent Advances in Zinc Metabolism. Eds. A S Prasad, I E Dreosti and B S Hetzel. pp 1–17. Alan R Liss Inc., New York, USA.Google Scholar
- Reuter D J 1986 Temperate and sub-tropical crops. In Plant Analysis: An Interpretation Manual. Eds. D J Reuter and J B Robinson. pp 38–99. Inkata Press, Melbourne, Australia.Google Scholar
- Shukla U C and Raj H 1974 Influence of genetic variability on zinc response in wheat (Triticum spp.). Soil Sci. Soc. Am. Proc. 38, 477–479.Google Scholar
- Sillanpãã M 1982 Micronutrients and the nutrient status of soils. A global study. FAO Soils Bulletin, No.48, FAO, Rome, Italy.Google Scholar
- Sillanpãã M and Vlek P L G 1985 Micronutrients and the agroecology of tropical and Mediterranean regions. Fert. Res. 7, 151–167.Google Scholar
- Sims J T and Johnson G V 1991 Micronutrient soil tests. In Micronutrients in Agriculture. 2nd ed. Eds. J J Mordvedt et al. pp 427–476, The Soil Science Society of America Book Series No. 4, Soil Science Society of America, Madison, WI, USA.Google Scholar
- Singh K, Shukla U C and Karwasra S P S 1987 Chemical assessment of the zinc status of some soils of the semi-arid region of India. Fert. Res. 13, 191–197.Google Scholar
- Takkar P N and Walker C D 1993 The distribution and correction of zinc deficiency. In Zinc in Soils and Plants. Ed. A D Robson. pp 151–166. Kluwer Academic Publishers, Dordrecht, the Netherlands.Google Scholar
- Treeby M, Marschner H and Römheld V 1989 Mobilization of iron and other micronutrient cations from a calcareous soil by plant-borne, microbial and synthetic metal chelators. Plant and Soil 114, 217–226.Google Scholar
- Warncke D D and Barber S A 1972 Diffusion of zinc in soil: I. The influence of soil moisture. Soil Sci. Soc. Am. Proc. 36, 39–42.Google Scholar
- Welch R M 1993 Zinc concentrations and forms in plants for humans and animals. In Zinc in Soils and Plants. Ed. A D Robson. pp 183–195. Kluwer Academic Publishers, Dordrecht, the Netherlands.Google Scholar
- Wilkinson H F, Loneragan J F and Quirk J P 1968 The movement of zinc to plant roots. Soil Sci. Soc. Am. Proc. 32, 831–833.Google Scholar
- Zhang F, Römheld V and Marschner H 1989 Effect of zinc deficiency in wheat on the release of zinc and iron mobilizing exudates. Z. Pflanzenernaehr. Bodenkd. 152, 205–210.Google Scholar