Abstract
Boron is one of the most limiting micronutrients in grains production system in Brazil. In this way, the objective was to evaluate the effect of forms of application and doses of boron in irrigated wheat grain yield evaluating the economic terms in Cerrado region. The experiment was conducted in no-tillage system in an Oxisol with clay texture in Selvíria, MS, Brazil. The experimental design was a randomized block design with four replicates, arranged in a 4 × 3 factorial scheme: four doses of boron (0, 1, 2 and 4 kg ha-1) with boric acid source (B = 17%); and three apllication forms: a) in desiccation of the predecessor straw, together with herbicide; b) at the time of sowing, in soil along with the formulated fertilization seeding and c) via leaf tissue with the application of post emergent herbicide. The application of 2 kg ha-1 provides greater grain yields, but the highest economic return was obtained at the dose of 1 kg ha-1, with application in soil, ensuring profitability from production of irrigated wheat in the Cerrado.
Highlights
Wheat (Triticum aestivum L.) is an annual cycle plant, considered among the cool season cereal, one that has greater economic importance, with large grain yield capacity (Teixeira Filho et al, 2010; Marini et al, 2011; Teixeira Filho et al, 2012, 2014; Theago et al, 2014)
Fertilization is recognized as one of the factors that favors the productivity and sustainability of the activity (Araújo, 2011; Galindo et al, 2016, 2017a, 2017b), and among the nutrients that most affect productivity, boron (B) is the most limiting micronutrient for crops, especially in tropical soils, which are generally low in B available and low in organic matter, a major source of this nutrient to plants, which culminates in inadequate plant nutrition (Souza et al, 2011)
The application of B doses in the soil resulted in higher grain yield as compared to straw and leaf application
Summary
Wheat (Triticum aestivum L.) is an annual cycle plant, considered among the cool season cereal, one that has greater economic importance, with large grain yield capacity (Teixeira Filho et al, 2010; Marini et al, 2011; Teixeira Filho et al, 2012, 2014; Theago et al, 2014). The cereal occupies over 17% of cultivable land in the world and represents approximately 30% of world grain production. In the period from 2012 to 2016, the annual average area of wheat cultivated worldwide was approximately 220 million hectares, reaching 734 million tons in the 2015/2016 harvest (USDA, 2016). In addition to the better fertilization of flowers and grain formation, B interferes with the retention of newly formed spikes, besides acting on meristem growth, cell differentiation, maturation, cell division and plant growth
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