The plants of C. arabica do not naturally produce a large number of orthotropic sprouts, hindering clonal multiplication by cutting, which would be the simplest technique with a lower cost of production compared to other methods of vegetative propagation. An alternative form, used successfully in the propagation of eucalyptus, is propagation by minicutting, which consists of pruning the shoot apex of the plant, forming the ministumps, which in variable time interval emits the shoots that will be used to make minicutting. In C. arabica plants the number of shoots can be increased with the application of growth regulators and fertilizers. So, the purpose of this work was to verify the effect of growth regulators and foliar fertilizers on the emission and development of orthotropic shoots of C. arabica. The experiment was installed in a randomized complete block design, with ten treatments composed by growth regulators and fertilizers: T1 (Control); T2 (Stimulate + Sturdy + Enervig); T3 (Stimulate + Vitakelp + Biozyme); T4 (Tiba + Sturdy + Enervig); T5 (Tiba + Vitakelp + Biozyme); T6 (Brs + Sturdy + Enervig) T7 (Brs + Vitakelp + Biozyme); T8 (Stimulate); T9 (TIBA); T10 (Brs-Brassinoesteroid), each plot consisting of two plants. Biometric and physiological parameters were evaluated for the ministumps, as well as the biometric parameters of the shoots and plant survival. The results showed that there was no influence of the treatments on the biometric parameters of the ministumps. A greater number of orthotopic sprouts were obtained in treatments with the TIBA growth regulator, as well as a greater plant survival of the minicuttings, after 25 days of transplanting in a greenhouse. It was concluded that TIBA treatments influenced the production and quality of clonal minicuttings of C. arabica.
This study analyzes the technological conditioning factors of cassava production in the municipality of Campos dos Goytacazes-RJ, seeking to elucidate the limitations and technological barriers that have contributed to the decline of crop production and productivity. A descriptive and quantitative methodology was adopted, in which the Survey method was used to analyze the technological factors through a questionnaire applied to 157 cassava producers in the field. The results evidenced the low degree of modernization of cassava in the municipality of Campos-RJ, intensive and extractive land use, generally produced on a small scale and with a low level of capitalization and productivity of work and land. This context seems to stimulate a vicious cycle, of low performance of the crops and profitability, low capacity of accumulation of resources, and capital and technological possibilities, favoring a gradual process of discouragement of the production. Without the possibility of gains and accumulation of income, the degree of uncertainty and risk tend to increase, as adversities and external forces make the permanence and perpetuation of the activity even more difficult, to emphasize the climatic factors and obstacles of commercialization and market. Thus, the research reinforces the need to evaluate technological alternatives that fit the local culture, as well as mechanisms that make them accessible to producers, such as: technical assistance, rural credit, social organization, among other public policies which aim to reduce the aggravation of rural activity in the municipality.
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