Comparação de quatro sistemas de tratamentos no desempenho vegetativo e incidência de inços na cultura do trigo mourisco (Fagopyrum esculentum, Moench)

Abstract

Besides it’s food grain importance, buckwheat (Fagopyrum esculentum, Moench) shows a good weed suppressing potential. The vegetative performance is fundamental to ascertain the incidence of weevils, as well as the emphasis on the most appropriate and effective treatments, which present more effective weighing. Thus, the objective of the study was to compare four different systems of biodynamic, organic, conventional agrochemical and control.The field has begun with a crop rotation between forage sorghum (Sorghum sudanense), rye (Secale cereale), and buckwheat (Fagopyrum esculentum). The experiment was divided into several stages; the first stage consisted of cleaning the working area with a subsoiler, followed by plowing and harrowing with discs, to remove the clumps of brachiaria (Brachiaria spp.) present. In the second stage, forage sorghum (Sorghum sudanense) was sown as a ground cover to suppress the development of weeds by allelopathic action. The last stage consisted in the implementation of the five different types of treatment, by means of a new plowing and harrowing, followed by the sowing of buckwheat. The results reiterate that the biodynamic treatment did not bring significant results for the fresh and dry weight, since the Duncan test promoted more effective results for the conventional, organic and control treatments. Even so, the values presented in the conventional treatment demonstrate greater predominance, especially in the fresh weight and dry weight of the second buckwheat collection. Likewise, the significantly lower weed fresh and dry weights in the control treatment system reveals inversely proportional relationship between quantitative and qualitative in biomass production and dry matter contents.