In this experiment, 100 China agricultural university dwarf layers of 285 daysage were selected and randomly allocated into 5 groups. Mulberry fodders of 0%, 2.5%, 5%, 7.5% and 10% were respectively added to the diet. The trial period lasted 30 days so as to determine the egg quality.
120 day-old geese were divided into four groups at random. The first group were fed with Zn-unsupplemented corn-soybean meal basal diet(group A) and the other three groups were fed with the basal diets supplemented with 40 mg/kg(group B),110 mg/kg(group C) and 2000 mg/kg(group D) Zn as reagent grade ZnSO4·H2O,respectively.
On the basis of that the broilers in the control group were fed the basal diet only, broilers in treatment group l,2,3,were fed diets added organic rare earth 400mg, 600mg/kg, and 730 organic complex feed additive of 0.5% into the basal diets resp. , and a feeding experiment was conducted with them for 38 days.
The optimum technical conditions were summed up by orthogonal test as follows: waste spent grains ∶ wheat bran = 5∶1, candida mycoderma : geotrichum candidum link ∶ rh. oryzae = 1∶1∶2, 5 d culture at 32 ℃. The produced feedstuff is of high nutrition and absorbed easily by domestic animals.
The influence factors of the synthesis were discussed, and the best reaction conditions were found: the molar ratio of n-butyraldehyde to 1,2-propanediol is 1:1.5, the amount of catalyst used is 1.2% of feed stock, and the reaction time is 1.0 h.
It was found that the content of AGE in the copolymer increases with the increase in monomer conversion and molar faction of the AGE in the monomer feed.
However, the polymerization could slow down when the fraction of AGE increases in the monomer feed.
A feed rate self-adjusting method was proposed to uniform the grinding speed with the changes of sectional curvature.
Implementation of an adaptive feed speed 3D NURBS interpolation algorithm
Chinese Early Cretaceous birds had experienced a significant differentiation in morphology, flight, diet and habitat.
For each test group, 20 loaches with similar body size (5.17-7.99 g; 11.79-13.21 cm) were selected and kept in aquaria with dechlorinated water at (22±1)°C and fed a commercial diet every 48 h.
Diet composition of post-metamorphic bullfrogs (Rana catesbeiana) in the Zhoushan archipelago, Zhejiang Province, China
The analysis of the stomach contents shows that, for adult bullfrogs, the most important prey (by diet volume) overall were Decapoda, Coleoptera, Odonata, Mesogastropoda, Raniformes, and Cypriniformes.
Moreover, the prey size and diet volume increased with the body size of both adult and juvenile bullfrogs.
Liquid Chromatography-Mass Spectrometry Determination of Six 5-Nitroimidazoles in Animal Feedstuff
A liquid chromatography-mass spectrometry method for the determination of the coccidiostats metronidazole, ronidazole, dimetridazole, secnidazole, tinidazole and ipronidazole in feedstuff was developed.
The method was applied successfully to determine 5-nitroimidazoles in feedstuff at level of 0.05?mg?kg-1.
Addition of the calculated amounts of sodium selenite directly to the feedstuff instead to mineral premix was the cause of this intoxication.
The objective of the reported study was to assess the abilities of various methods to differentiate the sources of fats used in feedstuff formulations.
In the control, the rodents were allowed to select any of three feeds: protein-rich, protein-free with low cellulose content, and protein-free with high cellulose content.
In low-concentrated solutions, this deceleration results from a decrease in the flow that feeds the droplet, while in high-concentrated solutions, it is due to a droplet constriction and an increase in its curvature radius.
The scanner feeds the tip to the sample at a distance of up to 3 mm and positions it in the sample plane on a 4 × 4-mm area.
Voltammetric Determination of Riboflavin in Vitaminized Supplements and Feeds
Conditions for determining vitamin B2by stripping voltammetry were found, and a procedure was developed for measuring the mass concentration of vitamin B2in vitaminized supplements and feeds.