فهرست مطالب یونس رستمی

Peppermint is an herbal plant and add it in the diet improves the performance of broiler chickens.
the purpose of this study was to evaluate the effects of different levels of dried mint powder (1, 1.5 and 2 percent) and avilamycin (15 parts per million) on performance, lipid profile blood and carcass characteristics of broilers chickens.
For this purpose, 300 one-day-old male broiler chicks (Ross 308) were divided in 5 groups with 5 replicate and 12 chicks in each. The experimental treatments designed in completely randomized design experiment. All the birds fed the same starter (1 to 21 day of age) and grower (22 to 42 day of age) but were different dietary levels of dried mint powder and or used avilamycin.
mint powder levels effect on the weight again and feed intake in broilers chickens Weren’t significantly in the experimental periods (P>0.05). Whereas in compared with another treatments and control groups significantly decreased (P0.05). But, use of level 2 percent of mint Powder significantly reduced concentrations blood cholesterol, triglyceride, VLDL and LDL in the growth experimental (P Totally, based on recent results, using the highest level (2 percent) of mint Powder reduce feed conversion and blood cholesterol and harmful fats, also significantly increased immune organs weight of broilers.

Rainfall erosivity is defined as the power of raindrops to erosion, which can be expected to change in correspondence to changes in rain characteristics, particularly intensity and duration. This study was conducted to assess the effects of intensity and duration on rainfall erosivity in a semi-arid region in north west of Zanjan, Iran. Soil loss was measured at forty eight plots (60 cm Í 80 cm) under the simulated rainfalls with eight rainfall intensities and six durations at five replications in a sloped land (8%). Based on the results, out of 240 rainfall events, only 180 events caused soil loss at the plots. Rainfall intensity of 15 mm h-1 was threshold intensity of the rainfalls from view point of soil erosion at the plots. Total rainfall energy of rainfall (E) obtained based on the sum of energies of all raindrops had a better correlation with the amount
of soil loss at the plots (r= 0.92). Soil loss strongly correlated with an index obtained from the multiplication of maximum-7.5 minute intensity (I7.5) and rainfall energy (E), EI7.5. About 96 percentage of soil loss at the plots could be explained by EI7.5. The results indicated that, EI7.5 as compared to the EI30 can properly predict soil loss at the small plots similar to what usually happens in the surface erosion.