Foliar Fertilization with Boron on the Growth, Physiology, and Yield of Snap Beans
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ORIGINAL PAPER
Foliar Fertilization with Boron on the Growth, Physiology, and Yield of Snap Beans Karen Andreon Viçosi 1 & Aline dos Santos de Carvalho 1 Dalton Ribeiro 2 & Rilner Alves Flores 3
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Diogo Castilho Silva 1
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Fillipe de Paula Almeida 1
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Received: 9 October 2019 / Accepted: 19 January 2020 # Sociedad Chilena de la Ciencia del Suelo 2020
Abstract The snap bean is a vegetable of great worldwide economic importance. However, tropical soils have low amounts of nutrients, especially boron, a micronutrient essential for plant nutrition. The objective of this work is to verify the effects of foliar application of boron on the growth, physiology, nutrition, and productivity of snap beans. The experiment was carried out in a greenhouse in a completely randomized design, with five treatments comprising boron doses (0 – control, 1350, 2700, 4050, and 5400 ppm) and four replicates. Foliar application of boron was carried out at the V3 vegetative stage (third mature trifoliate). Growth, physiological, nutritional, and productivity variables were evaluated at the reproductive stages R5 (flowering) and R8 (harvest). Data were subjected to analysis of variance and F test at a 5% significance level. When significant, data was submitted to Student t, ScottKnott, and regression analysis. Doses above than 2700 ppm affected significantly foliar temperature, transpiration, stomatal conductance, photosynthesis, and internal carbon concentration of bean pods. Foliar fertilization with boron influenced significantly the content and accumulation of boron in the shoot (868%) and the root system (105%), but it did not change the contents in pods. However, although they affect the physiology of snap bean plants, the tested doses did not influence significantly the growth variables and productivity. Boron doses from 2700 ppm caused symptoms of phytotoxicity on snap bean crops. Therefore, we do not recommend foliar application of boron at the stage V3 in snap bean crops even with a low boron content in the soil. Keywords Phaseolus vulgaris . Plant nutrition . Micronutrient . Nutrition efficiency . Physiology
1 Introduction The snap bean (Phaseolus vulgaris L.) is a horticultural legume with a global economic importance. Its center of origin is the Americas (Vaz et al. 2017). It has a high profitability due to its short cycle and its high productivity. There is a high demand in the international market (Seif et al. 2016). Tropical soils have a low natural fertility and are poor in organic matter. They are deficient in some micronutrients, which may limit the productivity of crops (Gomes et al. * Karen Andreon Viçosi [email protected] 1
Postgraduate Program in Agronomy, School of Agronomy, Federal University of Goiás, Goiânia, Brazil
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Forest Engineer, Master in Plant Production, State University of Goiás, Goiânia, Brazil
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Department of Soil Science, School of Agronomy, Federal University of Goiás, Goiânia, Brazil
2017). Currently, several researchers have been studying the application of micronutrients, among t
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