Abstract
Within the increase of Coffee production and its export as well, a larger resourcefulness is been required to manufacture its bags. Due to these increases, a natural fiber source became valued again despite its growing had been forgotten for some years. The mallow is being observed as an excellent ecological alternative, but the knowledge of its handling and natural requirements are restricted, by the fact of lately inattention in this natural fiber. In this context with the purpose of contributing with the knowledge of this cultivation, an experiment was settled aiming to evaluate its growth, to characterize the visual of macro and micronutrients deficiency symptoms to determine the analytical levels of these nutrients. The mallow plants, variety BR-01, were cultivated in the Department of Soil’s greenhouse from Universidade Federal Rural da Amazônia-UFRA, in plastic vases containing 3 kg of ground silica and submitted to the following treatments: complete, omission of N, omission of P, omission of K, omission of Ca, omission of Mg, omission of S, omission of B, omission of Cu, omission of Fe, omission of Mn and omission of Zn. After a period comprehended between 7 and 29 days, the occurrence of deficiency symptoms has started, except for the treatments with omission of S, Cu and Zn. The plants development were mostly affected by the treatments with omission of B and Ca.
Highlights
The Urena lobata L.belongs to the family Malvaceae, known by being a native tropical plant from the Asian continent, with passing of the years it was introduced by the most several countries including Brazil, where its main incidence is in Pará and Maranhão States (Lorenzi, 2000; Forzza et al, 2012) and in Amazônia State which is the largest national producer (Araújo, Pereira, & Castro, 2015)
Having in mind the necessity of enlarge the nutritional information regarding the mallow cultivation in the state, this work was aimed to evaluate the growth, to characterize the macro and micronutrients deficiency, using the minus one element technique (MOET), and to determine the nutritional analytical levels in the mallow plants
Starting from the biometrics analyses accomplished we can observe the development of the mallow plants (Table 1), having as indicator the height, and the most affected plants were the ones with individual omission of boron, calcium and nitrogen (Graphic 01) when compared to the complete treatment
Summary
The Urena lobata L.belongs to the family Malvaceae, known by being a native tropical plant from the Asian continent, with passing of the years it was introduced by the most several countries including Brazil, where its main incidence is in Pará and Maranhão States (Lorenzi, 2000; Forzza et al, 2012) and in Amazônia State which is the largest national producer (Araújo, Pereira, & Castro, 2015). The valuation of mallow cultivated was given by the fact that it produces an extremely resistant fiber, becoming an indispensable raw material to manufacture bags for products such as coffee and potato. One of the main companies that produces this package in the national market is located in Pará State (Souza, 2008), which is investing over years to stimulate the mallow production, the main obstacle it is facing is the lack of information regarding the cultivation mainly about the soil nutrition and fertility. In Amazônia State the cultivation in meadow soils is a characteristic due to the naturally good fertility, capable to supply the plants nutritional needs (Castro, Fraxe, Santiago, Matos, & Pinto, 2009) differently from the Pará State soil. Having in mind the necessity of enlarge the nutritional information regarding the mallow cultivation in the state, this work was aimed to evaluate the growth, to characterize the macro and micronutrients deficiency, using the minus one element technique (MOET), and to determine the nutritional analytical levels in the mallow plants
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