Showing 3 results for Aghaei
A. Aghaei, J. Pourreza, A. Pourreza, A. Samee,
Volume 9, Issue 2 (summer 2005)
Abstract
An experiment was conducted to study the effects of substitution of the different levels (0.0, 10, 20, 30 and 40%) of oat grains for the corn with and without enzyme supplementation (β -Glucanase. 0.0 and 1%) on the performance of the broiler chickens. Four hundred and eighty (480) Arian broiler chicks were employed in a randomized complete block design with 10 treatments and 3 replications (16 chickens for each replicate) from 1-56 days of age. The chicks fed with 10 percent of oats in the diets, supplemented with enzyme, had significantly higher BW than other treatments. While with 40 % oat in diet body weight were significantly decreased. The feed conversion increased with increasing of the oats levels and the enzyme supplementation resulted in lower feed conversion. With increasing oats in the diet, the percentage of carcass weight decreased, but the pancreas weight increased significantly. Conversely, the enzyme supplementation resulted an increase in carcass weight and reduction in the pancreas weight. The percentage of the tibial ash, calcium and phosphorus were unsignificaulty decreased with the increasing of the oat but enzyme lementation resulted an increase in tibial ash, calcium and phosphorus. In the areas where the corn production is limited, including 30 percent of the oats supplemented with enzyme in the diet of the broiler chicks can be beneficial.
R. Amoaghaei,
Volume 11, Issue 40 (summer 2007)
Abstract
Ferula ovina Boiss. is one of grazing species whose seed germination faces certain problems. The dormancy characteristics of and optimum conditions for seed germination of this species have not been investigated so far. The present research was designed to investigate the effect of GA3 and moist chilling on seed germination of this plant. At first, a factorial the experiment in a completely randomized design with 6 replicates was performed to evaluate the factors: cold period in 0-3 °C (0,3,5,7,9 weeks), GA3 concentrations (0,500,1000 PPm) and time of GA3 (before cold, during cold, after cold). In the second experiment, the effect of cold duration and GA on T50 Ferula seed was investigated in 6 replications. The best treatment was moist chilling for 7 weeks at 3 C or 3 weeks of moist chilling together with soaking in 500 PPm GA3 solution for 12 h. These treatments significantly increased germination percentage and decreased the time of for germination by 50% (T50) compared to control. The addition of GA3, together with cold duration was more effective than its application before cold period, addition of GA3 after cold period, no further increase in germination occurred. Also increasing GA3 concentration (500 to 1000 PPm) did not have any significant effect on the percentage of germination and could not replace the total need for pre chilling. The results showed that Ferula ovina seeds display an endophysiological dormancy that can be released by GA3 and moist chilling treatment.
S. Aghaei, M. Gheysari, M. Shayannejad,
Volume 27, Issue 2 (Summer 2023)
Abstract
Due to water scarcity, it is impossible to utilize all irrigated cropland in arid and semi-arid areas. Therefore, dense cultivation with a drip irrigation system that delivers water directly to the plant's root zone is an appropriate choice to enhance water productivity. The objectives of the present study were to compare wheat yield and water productivity under two different water distribution patterns in the drip-tape irrigation system and surface irrigation in full irrigation and deficit irrigation levels. The experimental treatments consist of two irrigation systems (drip-tape (DT), and surface irrigation (SU)), and three different irrigation levels (a full irrigation level (W1), two deficit irrigation levels, the irrigation interval twice, and the same irrigation depth of W1 level (W2), applied half of the irrigation depth of W1 level at the same time (W3)). The SU was implemented in place with 100% efficiency to avoid runoff. The yield in full irrigation level in DT was 5338.4 kg/ha and in SU was 5772.8 kg/ha. Applying deficit irrigation in two irrigation systems has different effects due to various water distribution patterns. In the DT, the most yield reduction was in W2, and in SU was in W3. The highest water productivity in DT was observed in W3 with a 1.44 kg/m3 value. The highest water productivity in SU was observed in W2 with a 1.46 kg/m3 value. For each irrigation system, some type of deficit irrigation management is optimal.
