Abstracts
1. Tagged superphosphate was applied to 2.5 year old passion fruit plants from a commercial plantation established in a sandy loam. 2. 100 grams of the fertilizer were distributed in the following ways: in a circular furrow 20 cm around the plant 40 cm from the stems; in a circular strip 10 cm wide, 40 cm from the stems; in six holes around the plants, 40 cm from the stems 20 cm deep, 2.5 cm in diameter. 3. 10 grams of the fertilizer in 11 of water were sprayed to the leaves. 4. Three weeks after the treatments were made, leaf samples were taken for analysis. 5. Determinations of specific activities both in the leaves and in the fertilizer used have shown that R in the plant was derived from the superphosphate in the following relative proportions (by making the first treatment equal to 100): circular furrow = 100; circular strip = 120; holes = 30; foliar spray = 230.
Em um ensaio de campo o superfosfato radioativo foi fornecido a plantas de maracujá de 4 maneiras: em furos nos solos, em cobertura circular, em sulco circular e nas folhas. A determinação da atividade específica nas folhas mostrou a seguinte eficiência relativa: sulco circular = 100, cobertura, circular = 120, furos = 30, aplicação foliar = 230.
Studies on the mineral nutrition and fertilization of the passion fruit plant (Passiflora edulis F. flavicarpa): II. placement of fertilizer phosphorus
Estudos sobre a nutrição mineral e adubação do maracujá (Passiflora edulis F. flavicarpa): II. localização do fertilizante fósforo
V. M. RapchanI; E. MalavoltaII
IDept. of Chemistry, ESALQ, USP, Piracicaba, SP
IICENA, ESALQ, Piracicaba, São Paulo
SUMMARY
1. Tagged superphosphate was applied to 2.5 year old passion fruit plants from a commercial plantation established in a sandy loam.
2. 100 grams of the fertilizer were distributed in the following ways: in a circular furrow 20 cm around the plant 40 cm from the stems; in a circular strip 10 cm wide, 40 cm from the stems; in six holes around the plants, 40 cm from the stems 20 cm deep, 2.5 cm in diameter.
3. 10 grams of the fertilizer in 11 of water were sprayed to the leaves.
4. Three weeks after the treatments were made, leaf samples were taken for analysis.
5. Determinations of specific activities both in the leaves and in the fertilizer used have shown that R in the plant was derived from the superphosphate in the following relative proportions (by making the first treatment equal to 100): circular furrow = 100; circular strip = 120; holes = 30; foliar spray = 230.
RESUMO
Em um ensaio de campo o superfosfato radioativo foi fornecido a plantas de maracujá de 4 maneiras: em furos nos solos, em cobertura circular, em sulco circular e nas folhas. A determinação da atividade específica nas folhas mostrou a seguinte eficiência relativa: sulco circular = 100, cobertura, circular = 120, furos = 30, aplicação foliar = 230.
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LITERATURE
Entregue para publicação em 15/12/1976
- BARBER, S.A. & R.A. OLSON. 1968 - Fertilizer use on corn. In: Changing Patterns in Fertilizer Uses. Ed. by L.B. Nelson et al., Publ. by the Soil Sci., Soc. of America, Inc., Madison.
- HAAG, H.P., G.D. OLIVEIRA, A.S. BORDUCCHI & J.R. SARRUGE, 1973 - Absorção de nutrientes por duas variedades de maracujá. An. E.S.A. "Luiz de Queiroz'' 30:267-279.
- MALAVOLTA, E., L.N. MENARD & W.L. LOTT. 1959 - Estudos sobre a alimentação mineral do cafeeiro. III. Absorção do superfosfato radioativo pelo cefeeiro (Coffea arábica L.) em condições de campo. An. E.S.A. "Luiz de Queiroz", 16:101-111.
- PAULA, O.F. de., R. LOURENÇO & E. MALAVOLTA. 1974 - Estudos sobre a nutrição mineral do maracujá (Passiflora edulis F. flavicarpa). I. Extração do macro e micronutrientes na colheita. Rev. da Agric. XLIX (2-3) :61-66.
- WITTWER, SH..MJ. BUKOVAC & H.B. TUKEY. 1963 - Advances in foliar feding of plant nutrients. In: Fertilizer Technology and Usage. Ed. by M.H. Mac Vickar, G.L. Bridger & L.B. Nelson, Publ. by the Soil Sci. Soc. of America, Madison.
Publication Dates
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Publication in this collection
29 May 2012 -
Date of issue
1976
History
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Received
1976
