Sugarcane is a very important economic crop that relies heavily on agricultural machinery, which contributes to soil compaction and a consequent decline in productivity. Subsoiling operation reduces the problems caused by compression; however, it is necessary to know its location and intensity. Accordingly, the aim of this work is to present a compression diagnostic method based on soil resistance to penetration as the parameter that indicates need for intervention in the subsoil. Measurements of penetration resistance was carried out in areas of sugarcane, located in the municipalities of Goianésia, Barro Alto and Santa Isabel, in the Brazilian state of Goiás. The Falker penetrometer (PLG 1020) was used, adjusted to a maximum depth of 40 cm and adopted as a critical resistance value of 4.0 MPa. The data were interpolated using kriging and adjusted in AutoCAD 2013 (Autodesk). The methodology proved effective in areas of compacted soil, and the surface layer had less resistance. The reduction in soil preparation was 96.54% and when considering the topographic adjustments, the reduction was 74.07%, showing the viability and importance of the diagnosis to show the proper management.
The rhizosphere is the region of influence of the roots of the plants in the soil that provide environment favorable to the maximum microbial activity. As the maximum microbial activity occurs in the rhizosphere, several benefits are added to this environment, since it becomes a source of biodiversity of microorganisms capable of maintaining the ecological balance, and also provide significant improvements for plants the soil and for the environment. The objective of this work was to evaluate the influence of xenobiotics (fungicides and insecticides) in an isolated and combined way on the microbial diversity benefices of the rhizosphere under the cultivation of 4 unconventional food plants (UFP's) or exotic vegetables. This work was performed with a randomized complete block design in the 4 x 4 factorial scheme, the first factor being the cultures: Fragaria vesca L. (“morango”), Rumex acetosa L. (“azedinha”), Tropaeolum majus L. (capuchin - “capuchinha”) and Stachys Lanata L. (“peixinho”) and the second factor (application with insecticide, application with fungicide, insecticide / fungicide application and control) with 4 replicates. There was no statistical difference between the cultures in relation to the numbers of fungal and soil CFUs and that the application of xenobiotics (fungicides and insecticides, isolated and combined) did not affect the microbial diversity in the soil cultivated with the crops. The xenobiotics did not affect the microbial diversity present in the soils of the tested cultures, being similar statistically with the control. UFP's crops did not present statistical differences regarding CFU in cultivated soils.
A presença de coração morto em cana de açúcar é reflexo do ataque da broca-da-cana (Diatraea saccharalis) sendo que 1% de intensidade de infestação reduz em média 0,77% da produtividade, 0,25% de açúcar e 0,20% de Álcool (GALLO et al., 2002). Um dos métodos de controle utilizados é o uso de diferentes inseticidas. Objetivou-se com este trabalho avaliar a influência de dois inseticidas no índice de infestação de broca. O experimento foi conduzido no Pólo do Centro de Tecnologia Canavieira (CTC) Goiás Norte em Goianésia GO, utilizandose delineamento de Blocos casualizados com três repetições. Cada parcela foi composta por quatro linhas de plantas espaçadas com 1,5 m, com 100 metros de comprimento e 18 gemas por metro linear. Os tratamentos avaliados foram: T1 = Regente + Altacor + Prori Xtra nas dosagens recomendadas; T2 = duas vezes a dose recomendada de Altacor; T3: dose recomendada de Altacor; T4 = Regente + Altacor em dosagens recomendadas e T5 = Testemunha sem aplicação. Avaliou-se aos 60 dias após o plantio a intensidade de infestação (i.i) de coração morto e aos 90 dias o stand de plantas. Foi realizado ao fim do experimento a análise econômica com base nos custos de produção e produtividades. Os dados foram submetidos a analise variância pelo software estatístico Assistat. Para a intensidade de infestação, observou-se que o melhor tratamento foi o T4 frente aos demais com i.i. média de 0,66% enquanto o pior tratamento foi a testemunha com 4,35%. Quanto ao stand observou-se influência significativa apenas para o T1 sendo este tratamento o que apresentou maior número de plantas por hectare (média de 87.870). A análise econômica foi baseada nas revendas comerciais na Região de Goianésia em Abril de 2016, sendo que o custo de produção por hectare na região é de R$ 2500,00, onde o custo de aplicação foi de R$ 20,00/ha e a venda de tonelada da cana é em média R$ 51,00, diante deste exposto excluindo a testemunha o que teve menor custo de aquisição foi o Tratamento Alt. (Altacor na dose recomendada, apresentando ainda maior produtividade e maior retorno econômico, enquanto que Reg+Alt+PrioX é relativamente alto que se torna viável quando a produtividade for alta, porém a testemunha apresentou alto retorno econômico, mas é uma prática arriscada onde houver altas taxas de infestação de lagartas causadoras do "Coração Morto".Palavras-chave: Saccharum, Diatraea saccharalis, inseticidas, danos. ABSTRACTThe presence of a dead heart in sugar cane reflects the attack of the cane borer (Diatraea saccharalis), with 1% of infestation intensity reducing on average 0.77% of productivity, 0.25% of sugar and 0, 20% Alcohol (GALLO et al., 2002). One of the control methods used is the use of different insecticides. The aim of this work was to evaluate the influence of two insecticides on the borer infestation index. The experiment was carried out at the Center for the Sugarcane Technology Center (CTC) Goiás Norte in Goianésia GO, using a randomized block design with three replications. Each plot was composed of four rows of 1.5 m ...
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.