Variação na composição proteica dos grãos de sorgo, em função da adubação nitrogenada e fosfatada e das épocas de plantio
Palavras-chave:
adubação nitrogenada e fosfatada, teor de proteína, épocas de plantio, produção de proteína, sorgo graníferoResumo
A study was conducted in Viçosa, Minas Gerais, to determine the effects of nitrogen and phosphorus fertilizers and planting dates on grain protein content and grain protein yield per hectare in grain sorghum (Sorghum bicolor (L.) Moench).
‘Two experiments were performed in 1972-73, one in the rainy season and the other in dry season. The sprouting (Ratoon) of the rainy season planting after harvest was studied also. Treatments were: three levels of nitrogen fertilization (0, 50 and 100 ke/ha of N), three levels of phosphorus fertilization (0, 60 and 120 ke/ha of P205) and three planting dates. Only nitrogenous fertilizer was applied to the sprouting of the rainy season experiment.
Nitrogenous fertilizer increased grain protein yield in all cases, and the grain protein content in second harvest of the rainy season experiment. Even though phosphorus fertilization had not increased grain protein content, it increased grain protein yield in the rainy and dry season trials. Nitrogen and phosphorus fertilization and planting dates acted synergistically on grain protein content in the dry season experiment. In general higher grain protein contents and lower grain protein yields per hectare were found in the dry season harvests (dry season experiment and the second crop of the rainy season experiment). The grain protein yields per hectare were more dependent on grain yield than on the grain protein content. The grain protein content varied inversely with grain yield, especially in relation to planting dates.
Referências
BURLESON, C. A., W. R. COWLEY & G. OTEY. Effect of nitrogen fertilization on yield and protein content of grain sorghum in the lower Rio Grande Valley of Texas. Agron. Journal 48(11):524-525. 1956.
CAMPBELL, A. R. & R. C. PICKETT. Effect of nitrogen fertilization on protein quality and quantity and certain other characteristics of 19 strains of Sorghum bicolor (L.) Moench. Crop. Sci. §(5):545-547. 1968.
CUMMINGS, D. P. & J. D. AXTELL. Effect of tannin content of Sorghum bicolor (L.) Moench grain on nutritional quality. Purdue University, Agr. EXp. Sta., 1973. 200 p. (Inheritance and improvement of protein quality and content in sorghum — Report 10).
GOMES, F. P. Curso de Estatística Experimental. 4. ed. Piracicaba, Liv. Nobel, 1970. 430 p
HORWITZ, W., ed. Official methods of analysis of the Association of Official Agricultural Chemists. Washington, A.O.A.C., 1965. 957 p.
MacGREGOR, J. M., L. T. TASKOVITCH & W. P. MARTIN. Effect of nitrogen fertilizer and soil type on the amino acid content of corn grain. Agron. Journal 53(4):211-214. 1961.
MacLEOD, L. B. & M. SUZUKI. Efectos de N, de P y de K sobre la composicion quimica de la cebada cultivada sobre un suelo podzolico de baja fertilidad en invernadero. Can J. Soil Sci. 52(2):169-177. 1972. In: REVISTA DE LA POTASSA 9(8-9):2. 1973.
MALAVOLTA, E. Nutricdo e adubacdo do milho (Zea mays) e do sorgo (Sorghum vulgare). Piracicaba. ESALQ, 1974. 22 p. (Apostila mimeografada).
MERTZ, E. T., R. JAMBUNATHAN & P. S. MISRA. Simple chemical and biological methods used at Purdue University to evaluate cereals for protein quality. Purdue University, Agr. EXp. Sta., 1975. 24 p. (Station Bulletin 70).
MILLER, G. D., C. W. DEYOE & F. W. SMITH. Variations in protein levels in Kansas sorghum grain. Agron. Journal 56(3):302-304. 1964.
MORRISON, F. B. Alimentos e alimentação dos animais. 2. ed. São Paulo, Ed. Melhoramentos. 1966. 892 p.
ONKEN, A. B. Cultural practices for grain sorghum production. Texas Agr. Exp. Sta., 1971. 120 p. (Grain sorghum research in Texas).
OSWALT, D. L., J. D. AXTELL, G. SRINIVASAN, A. SPIES & R. de LONG. International grain sorghum protein yield and quality trials. Report NO. 1. Purdue University, Agr. EXp. Sta., 1974. 50 p. (Station Bulletin 52).
OSWALT, D. L. & R. C. PICKETT. International protein yield trials and evaluation. Arizona, Sorghum Research Commitee, 1972. 162 p. (Sorghum Newsletter 15).
PROGRAMA INTEGRADO DE PESQUISAS AGROPECUÁRIAS DO ESTADO DE MINAS GERAIS. Recomendações do uso de fertilizantes para o estado de Minas Gerais. 2.o tentativa. Belo Horizonte, Secretaria da Agricultura, 1972. 88p.
RAI, K. D. Study of rain-grown sorghum and maize in the central rainlands of the Sudan. 2. Effect of fertilizers on crude protein content and nitrogen accumulation. Indian F. Agron. 10(2): 139-144, 1965. In: FIELD CROP ABSTRACTS 19(2):120. 1966 (Abstracts 877).
ROSS, W. M. & O. J. WEBSTER. Culture and use of grain sorghum. Washing- ton, Agr. Res. Serv., 1959. 30 p. (Agr. Hanbook 385).
SCHNEIDER, B. H. The nutritive value of corn. In: Sprague, G. F., ed. Corn and corn improvement. N. York, Academic Press, 1955. p. 637-678.
SEMENTES AGROCERES S.A. Sorgo: as perspectivas de uma cultura em expanséo. Jornal Agroceres, Sao Paulo, outubro 1973, p. 1.
TWEEDY, J. A, A. D. KERN, G. KAPUSTA & D. E. MILLIS. Yield and nitrogen content of wheat and sorghum treated with different rates of nitrogen fertilizer and herbicids. Agron. Journal 63(2):216-218. 1971.
WAGGLE, D. H, C. W. DEYOE & F. W. SMITH. Effect of nitrogen fertilization on the amino acid composition and distribution in sorghum grain. Crop Sci. 7(4):367-368. 1967.
WORKER, G. F. & J. RUCKMAN. Variations in protein levels in grain sorghum grown in the southwest desert. Agron. Journal 60(5):485-488. 1968.
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