Acumulação diferencial de nutrientes por cinco cultivares de milho (zea mays L): II - acumulação de micronutrientes

Differential accumulation of nutrients by five cultivars of corn (Zea mays L.): II - micro nutrients accumulation

Acumulação diferencial de nutrientes por cinco cultivares de milho (zea mays L). II - acumulação de micronutrientes^*

Differential accumulation of nutrients by five cultivars of corn (Zea mays L.). II - micro nutrients accumulation

A.G. de Andrade^I; H.P. Haag^II; G.D. de Oliveira^II; J.R. Sarruge^II

Universidade Federal Rural de Pernambuco, Recife-PE

RESUMO

No presente trabalho, os autores apresentam os resultados de um ensaio de campo empregando os cultivares Agroceres 256, Agroceres 504, Centralmex, H-7974 e Piranao no sentido de aquilatar diferenças na acumulação e exportação de micronutrientes. O ensaio foi conduzido num regossol de fertilidade mediana, exceto em relação ao K que é baixo, situado no município de Piracicaba, SP. O delineamento experimental utilizado foi de blocos ao acaso com 4 repetições. Foram seguidas as práticas culturais comuns e a adubação constituiu de 83 g da fórmula 30--120-70 por metro linear por ocasião do plantio e 33 g por metro linear da fórmula 50-0-4, em cobertura 22 dias após a germinação. Plantas foram coletadas a partir dos 20 dias após a germinação, em intervalos de 20 dias até os 120 dias. As plantas foram divididas em "colmo + folhas", pendão e espiga e analisadas para B, Cu, Fe, Mn e Zn. Concluíram os autores que diferenças na acumulação de micronutrientes manifestam-se antes da fase de crescimento intenso. Os cultivares atingem o máximo da quantidade dos nutrientes nas seguintes épocas, em dias:Cu (61-85); Fe (71-76); Mn (82-94); Zn (87-108). Verificaram, ainda, que as quantidades máximas extraídas em mg/planta são:Cu (2,06--3,49); Fe (26,66-36,28); Mn (9,92-14,39); Zn (5,88-6,69). Finalmente a exportação de nutrientes nas espigas por hectare (50.000 plantas) colhidas é: Cu (26-35 g); Fe (200-220 g); Mn (90-140 g) e Zn (160-250 g).

SUMMARY

The objective of the present work was to examine the differences in growth, yield, accumulation and transport of nutrients between the cultivars Agroceres 256, Agroceres 504, Centralmex, H-7974 and Piranão. The experiment was carried out in the municipality of Piracicaba, State of São Paulo, Brazil. The soil type was a sandy oxisol of medium fertility, except for K which was low. The experimental set-up was a randon block design with four replications. Common cultivation practices were followed, and the fertilizer used consisted of 83 g of a formula: 30-120-70, per meter lenght at planting, and 33 g of the formula: 50-0-45 per meter lenght as dressing 22 days after germination. The plant population density was 50,000 per hectare. Plants were collected for analysis at 20 days after germination, and there after at intervals of 20 days up to 120 days. The plants were divided into "stems + leaves", tassels, and ears for chemical analysis of Cu, Fe, Mn and Zn.

Conclusions:

Accumulation of nutrients

- Differences in the accumulation of micronutrients appeared before the period of rapid growth (20 days) although afterwards no differences were detectable.

- The maximum level of nutrients are attained in the following period (in days): Cu (101 -104); Fe (106-120); Mn (82-94); Zn (87-108).

- The maximum quantities taken-up (in mg/plant) are: Cu (2.06-3.49); Fe (26.66- -36.29); Mn (9.92-14.39); Zn (5.88-6.69).

Transport of nutrients

- The transport of nutrients into the ears of the different cultivars are (per ha harvested): Cu (26-35 g); Fe (200-220 g); Mn (90-140 g); Zn (160-250 g).

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LITERATURA CITADA

Entregue para publicação em 22/07/1975.

• BRASIL SOBRş, M.O.C., 1966. Levantamento do teor de zinco em alguns solos do município de Piracicaba. Piracicaba, SP., 96 pp. Tese (cátedra). ESALQ.
• BROWN, J.C., 1967. Differential uptake of Fe and Ca by two corn genotypes. Soil Sci., 193: 331-338.
• BROWN, J.C. & BELL, W.D., 1969. Iron uptake dependent upon genotypes of corn. Soil Sci. Soc. Amer. Proc, 33:99-101.
• BROWN, J.C. & AMBLER, J.E., 1970. Further characterization of iron uptake in two genotypes of corn. Soil Sci. Soc. Amer. Proc, 34:249-252.
• BROWN, J.C, AMBLER, J.E., CHANEY, R.L. & FOY, C.E., 1972. Differential response of plant genotypes to micronutrients. IN: Mortvedt, J.J. et al. (eds.). Micronutrients in agriculture. Soil Science Society of America, Inc., Madison, Wis., p. 389-413.
• BROWN, J.C. & CLARK, R.B., 1974. Differential response of two maize imbreds to molybdenum stress. Soil Sci. Amer. Proc, 38:331-333.
• CLARK, R.B. & BROWN, J.C, 1974a. Differential mineral uptake by maize imbreds. Comm. Soil Sci. Plant Anal., 5:213-227.
• DONALD, C.M., 1968. The breeding of crop ideotypes. Euphytica, 17:385-03.
• DUNCAN. W.G., 1967. Corn yield to meet the challenge. IN:Maximum crop yield - the challenge. American Society of Agronomy (publicação especial nş 9), Madison, Wis., p. 51-56.
• EPSTEIN, E., 1972. Mineral nutrition of plants: principles and perspectives.'John Wiley and Sons. Inc., New York, London. 412 p.
• FRIED, M. & PEECH, M., 1946. The comparative effects of lime and gypsum upon plants grown on acid soils. J. Amer. Soc. Agron., 38:614-623.
• GORSLINE, G.W., THOMAS, W.I. & BAKER, D.E., 1964. Inheritance of P, K, Mg, Cu, B, Zn, Mn, Al, Fe concentration by corn (Zea mays L.) leaves and grain. Crop Sci., 4:207-210.
• GORSLINE, G.M., BAKER, D.E. & THOMAS, W.I., 1965. Accumulation of eleven elements by field corn (Zea mays L.). The Pennsylvania Agricultural Experiment Station. Bull. 725.
• GREGORY, F.G. & CROWTHER, F., 1928. A physiological study of varietal difference in plants. Part I: A study of the comparative yields of barley varieties with different manurings. Ann. Bot., 42:757-770.
• JONES, J.B., Jr., 1972. Plant tissue analysis for micronutrients. IN:Mortvedt, J.J. et al. (eds.). Micronutrients in agriculture. Soil Science Society of America, Inc., Madison, Wis., p. 319-346.
• LOCKMAN, R.B., 1969. Relationships between corn yields and nutrient concentration in seedling whole-plant samples. Agron. Abstr., p. 97. American Society of Agronomy, Madison, Wis.
• LUTZ, J.A., Jr., GENTER, C.F. & HAWKINS, G.W., 1972. Effect of soil pH on element concentration and uptake by maize. I: P, K, Ca, Mg and Na. Agron., J., 64 :581-583.
• MALAVOLTA, E., HAAG, H.P., MELLO, F.A.F. & BRASIL SOBRş, M.O.C., 1974. Nutrição mineral e adubação de plantas cultivadas. Liv. Pioneira editora, São Paulo, 727 pp.
• MOORE, D.P., 1972. Mechanisms of micronutrients uptake by plants. IN: Mortvedt, J.J. et al. (eds.). Micronutrients in agriculture. Soil Science Society of America, Inc. Madison, Wis., p. 171-198.
• NEUBERT, P., WRAZIDLO, W., VIELEMEYER, N.P., HUNDT, I., GULMICK, F. & BERGMANN, W., 1969. Tabellon zur planzenanalyzeerste orietierende ubersicht. Institut fur planzener-nahrung. Jena, Berlin.
• OLSEN, S.R., 1972. Micronutrients interactions. IN: Mortvedt, J.J. et al. (eds.). Micronutrients in agriculture. Soil Science of America, Inc. Madison, Wis., p. 243-264.
• OLSON, R.A. & LUCAS, R.E., 1967. Fertility requirement: secundary and micronutrients. IN: Pierre, W.H. et al. (eds.). Advances in corn production: principles and practices. The Iowa State University Press. Ames, Iowa., p. 285-330.
• RANZANI, G., 1956. Levantamento da carta de solo da Secção Técnica "Química Agrícola" da Escola Superior de Agricultura "Luiz de Queiroz". Piracicaba, SP. Tese (livre-docente) -ESALQ.
• SARRUGE, J.R. & HAAG, H.P., 1974. Análises químicas em plantas. Piracicaba, SP. Departamento de Química, ESALQ (publicação especial).
• SPRAGUE, G.F., 1969. Germ Plasm manipulation in the future. IN: J.D. Eastin et al. (eds.). Physiological aspects of crop yield. American Society of Agronomy. Crop Sci. Society of America, Madison, Wis., p. 375-395.
• TUKEY, H.B., TUKEY JR., H.B. & WITTWER, S.H., 1958. Loss of nutrients by foliar leaching as determined by radioisotopes. Proc. Amer. Soc. Hort. Sci., 71:496-506.
• WARNOCK, R.E., 1970. Micronutrient uptake and mobility within corn plants (Zea mays L.) in relation to phosphorus - induced zinc deficiency. Soil Sci. Soc. Amer. Proc, 34:765-769.
• WATANABE, F.S., LINDSAY, W.L. & OLSEN, S.R., 1965. Nutrient balance involving phosphorus, iron, and zinc. Soil Sci. Amer., 29 562-565.

*

Parte da dissertação apresentada pelo primeiro autor para obtenção do grau de MESTRE pela E.S. A. "Luiz de Queiroz", USP. Suporte financeiro da EMBRAPA, Brasília-DF.

Datas de Publicação

• Publicação nesta coleção
  30 Maio 2012
• Data do Fascículo
  1975