One major concern for poultry producers is the productivity of chickens, with the lack or excess of minerals, this productivity is compromised and cannot be achieved to the maximum, giving damage to the producer. A descriptive study was carried out, identifying and checking deformities alleged techniques that can be applied to resolve these problems. Calcium and Phosphorus are essential minerals for the chickens, and which are essential for various functions and their bone development. The study of these minerals and their contribution to the broiler is of great importance and may be monitored and analyzed its development, identifying deficiencies and correct them with them. The appropriate rate of minerals to the broiler is crucial in their development, seeking to combat bone abnormalities with alternatives and techniques in their growth.
Corn culture is one of the important economic segments of Brazilian agribusiness. The increase in corn production is related to increased productivity and in the cultivated area. In addition, the variation in productivity in the different Brazilian states is highlighted, which can be explained by the technological level of production. Therefore, the objective was to evaluate the production costs of eighteen producing regions to determine the cost of production in the first harvest in three agricultural years and in the second harvest in four agricultural years with transgenic corn, in addition to analyzing the influence of productivity on the cost of production. An exploratory research was carried out with data provided by the Companhia Nacional de Abastecimento. Statistical data were analyzed in the agricultural years of 2018, 2019 and 2020 in eighteen Brazilian municipalities. The region of Chapadão do Sul - MS, in both harvests, obtained the lowest production costs per bag of 60 Kg and per hectare were in Balsas - MA and Santo Ângelo - RS. The highest production costs per bag and per hectare in the 1st harvest were in the cities of Unaí - MG and Boa Vista - RR and the lowest costs per hectare were in Campo Mourão - PR and Sorriso - MT. The highest production costs per bag in the 2nd harvest were in Rio Verde - GO and Ubiratã - PR and per hectare were in Unaí - MG and Campo Mourão - PR.
The efficiency of waste from industrial processing has been increasingly studied in the control of phytonematoids, especially filter cake, coffee husks and sugar cane bagasse. The objective of this study was to evaluate the effect of organic residues through the use of filter cake to reduce the population density of Pratylenchus brachyurus (Tylenchida: Pratylenchidae). The first experiment was conducted in a greenhouse in the completely randomized design in the 2 × 4 factorial scheme (soybean genotypes vs. filter cake doses) with four replications using soybean genotypes AS 3810 IPRO and LG60163 IPRO and the second experiment was carried out under the same conditions, with maize AG 1051 with four doses of filter cake with 7 replications. In both experiments, the planting was carried out in an area located in the city of Goianésia, Goiás, Brazil. The results showed that the population density of Pratylenchus brachyurus in the maize crop to grow AG 1051 did not show statistically significant difference by applying the different doses of filter cake. In soybean genotypes AS 3810 IPRO and LG60163 IPRO were affected in ways contrary to phytonematoid infestation, in which AS 3810 IPRO showed a population increase according to the increase of the applied amounts of filter cake, whereas in the cultivar LG60163 IPRO there was a decrease for doses of 10 tonnes/ha-1 and 30 tonnes/ha-1, with an increase of only 20 tonnes/ha-1.
Biofertilizers can also be used as plague and disease control agents. The commercial product Microgeo® is a biological biofertilizer rich in microorganisms. Few studies have been carried out to evaluate the interaction between biofertilizer and nematodes. The objective of this study was to evaluate the efficiency of the Microgeo® biological fertilizer to control the nematode Pratylenchus brachyurus in two sugarcane cultivars. The work was carried out in greenhouse conditions with a completely randomized experimental design (DIC), in a triple factorial scheme (2 x 2 x 4), being two types of sugar cane (CTC 04 and CTC 9003), two types of management of the biofertilizer (Management 1: application of the biofertilizer and inoculation of the nematode at 0 days after transplanting (DAT), management 2: application of the biofertilizer and inoculation of the nematode in the roots of the plant 30 days later) and four doses of the liquid biofertilizer Microgeo® (0 L ha‑1; 150 L ha-1; 300 L ha-1; 450 L ha-1), with four replications. 800 specimens of P. brachyurus were inoculated in each experimental plot. The results showed that cultivating CTC 9003 during the conduct of the experiment showed greater susceptibility to the nematode compared to cultivating CTC 04. The biofertilizer Microgeo® showed no curative or preventive effect on the control of the nematode under the conditions of the experiment.
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