Two water potentials (-10 and -40 kPa) and six B levels (0; 0.5; 1; 2; 3 and 5 mg dm-3 of B) were evaluated. The application of boron directly into the soil is more efficient than foliar techniques due to the low mobility it shows in plant tissues. Revista Brasileira de Ciencias do solo. (2005) for soils with boron levels lower than 0,2 mg dm3־ when the extractor is hot water. Distribuição de nutrientes e sintomas visuais de deficiência de boro em raízes de coqueiro-anão verde. number of feminine owers per spathe and the fruits. 2008a. The treatments consisted in the application of five boron dosages: zero, 1, 2, 4, and 6 kg ha-1. The treatments with boric acid were: 30 g applied on the axil of frond number 10; 60 g applied to the soil; and a control without boric acid application. In the field, the treatments were arranged according to a completely randomized block design, with four replications. Entretanto, a fronteira entre biofortificação e toxicidade de Se pode ser estreitada pelo aumento da demanda transpiratória resultante da variação na umidade relativa do ar (UR), contribuindo para que concentrações biofortificantes de Se tornem-se tóxicas. In: Raij, B. van, Cantarella. Teores de (hidr)óxidos de Fe cristalinos e amorfos estiveram correlacionados aos valores de KL obtidos nas amostras subsuperficiais e ao pH natural, bem como à Adsmáx das camadas superficiais após aumento do pH. In the samples, they were determined the N, K, P, Ca, Mg and Cl concentrations. Hence, adoption of measures such as application of organic manure at 20 kg palm -1 , husk burial in the basin and split application can enhance the nutrient use efficiency. As plantas da fazenda Capivari foram agrupadas em 4 categorias quanto ao número médio de frutos: <100; 101-150; 151-200 e >200 frutos planta-1 ano-1. (2004), in an evaluation of the nutritional status of a coconut palm orchard, reported that boron was one of the most yield limiting factors. Comparing the average boron content in leaves of the control treatment (9 mg kg-1) to that produced by the highest boron fertilizer dosage (51 mg kg-1) it is seenthat the treatment resulted in over a fivefold increase Only fertilizer dosages of 0, 1, and 2 kg ha1־ resulted in leaf boron concentration levels lower than the considered critical level ( 10 mg kg-1) as indicated by Sobral (1998), Rogon (1984), and Manciot et al. The experiment was carried out in a four year old, artificially irrigated, dwarf coconut palm orchard in Brazil, between January, 2005 and October, 2006. ** Results significant at 1% level according to the F test. Adsorption and transport of B in three soils of different textures were investigated in batch and column experi- ments. [ Links ], Prado, R.M. As a general rule, it, Join ResearchGate to discover and stay up-to-date with the latest research from leading experts in, Access scientific knowledge from anywhere. Journal of Soil Science and Plant Nutrition. Chronic B deciencies, caused by, Boron deciency, in general, reduces root growth, and in the coconut palm tree, production of total roots, status of a coconut palm orchard, reported that boron, to their ndings, the most important elements for, General recommendations for the application of, micronutrient should be applied directly into the, 1997) when analysis indicates levels lower than, application of boron directly into the soil is more, efficient than foliar techniques due to the low, mobility it shows in plant tissues. Analysis of leaf samples harvested in April of 2006 was as described by Rognon (1984). Soil and nutritional aspects associated with certain diseases and disorders across coconut growing regions are also presented. The treatments had consisted of the combination through the experimental matrix of Plan Puebla III, 5 doses of N and 5 doses of K2O both oscillating of 135 the 2565 g plant -1 year -1 derived of the urea and white potassium chloride. 32, 2581-2590. em coqueiro-anão-verde. Literature data confirm the beneficial effects of boron to coconut palm tree cultures. Da, Naiff, A.P.M. 2010. Boron Deficiency. Proyecto INTERNACIONAL CAPES, Manejo sostenible de los suelos tropicales, Boron absorption and redistribution in green dwarf coconut tree. The plants were grown in 2.5 dm3 plastic pots with soil, in a greenhouse. Boron applied, to the soil has a more persistent effect than when, Recommendations about boron dosages to be applied, to coconut plants are scarcely found in the literature, objective of this research study was to evaluate the, effects of boron applied to the soil by measuring, concentrations of the nutrient in plant leaves and the, to Koppen’s classification, is described as A, The coconut palm orchard was annually fertilized, with a mixture of 1.5 kg of N, 0.4 kg of P, cm wide band at a distance of 30 cm from the plant, (January of 2005) whereas N and K applications, were split in four – in January, February, Boron treatments described in this report consisted of, hectare applied in two equal parts each in a volume, The treatments were arranged in the experimental, and the other in February of 2005, in order to reduce, as to obtain a composite sample, which was used, to represent boron concentration in the soil. Boron concentration in soils of coconut palm trees cultures after application of different dosages of boron fertilizer. Melhoramento genético do coqueiro. Because the level estimated via the graphical method and by the Mistcherlich equation is similar with regard to the soil boron, 0.48 mg kg-1 can be considered as the critical boron level in soil. Recomendações de adubação e calagem para o Estado de Sao Paulo. [ Links ], Pinho, L.G.R., Monnerat, P.H., Pires, A.A., Marciano, C.R., Soares, Y.J.B. Low levels of boron found in tropical soils is, according to Mattiello et al. Application of Solubor to the soil significantly increased leaf B concentrations in all leaves of coconut palm after 2 months as well as in new leaves produced up to 6 months later. The critical boron level in soil and leaves was standardized using the following methods: the Cate and Nelson graphical (CN) method, the Mistcherlich equation (ME), and the quadratic plateau response (QP) method. 26, 330-334. The present review will provide an update on the physiological and molecular responses and tolerance mechanisms to B deficiency in woody plants. The treatments were arranged in the experimental area according to a completely randomized block design, with four repetitions. Applying boron to coconut palm plants: effects on the soil, on the plant nutritional status and on productivity boron to coconut palm trees, J. ** Results significant at 1%level according to the F test. 25, 371-. Increases in boron concentration in fronds persisted longer when boric acid was applied to the soil. Boron concentrations were significantly higher toward the tips of individual leaflets in both species. da., Conceição, H.E.O. 62, 131-138. 48p. 2008a), Sobral (1998), Broschat (2005), and Santos et al. Abordagem preliminar das condições climáticas de Uberlândia Sociedade & Natureza. Boron applied to the soil has a more persistent effect than when it is deposited in leaf axillae (Pinho et al., 2008b; Broschat, 2011). Frente à problemática acima mencionada, a presente proposta objetivará avaliar a contribuição do fator ambiental UR sobre a toxicidade de selênio no crescimento de plantas de alface a partir da estratégia de avaliações fisiológicas, nutricionais e anatômicas. 2004. Nutrição mineral de populações e híbridos de coqueiro (Cocos nucifera L.) cultivados em Bebedouro. When the plants were with 4, 4.5 and 5 years had been made three foliar material collections in two plants for parcel in 9 and 14 number leaves. [ Links ], Viégas, I.J.M., Thomaz, M.A.A., Silva, J.F. The adsorption rate coefficient values obtained from BTCs were smaller than those obtained from the batch kinetic data. Desenvolvimento Sustentável. The number of fruits per plant showed a quadratic increment with increasing boron fertilizer dosages (Figure 3).
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